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Merge branch 'x86/oprofile' into oprofile

This commit is contained in:
Ingo Molnar 2008-08-19 03:34:07 +02:00
parent 7e7b43892b 20211e4d34
commit 2879a927bb
6659 changed files with 187451 additions and 71677 deletions
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2
Documentation/00-INDEX
View File

@ -89,8 +89,6 @@ cciss.txt
- info, major/minor #'s for Compaq's SMART Array Controllers.
cdrom/
- directory with information on the CD-ROM drivers that Linux has.
cli-sti-removal.txt
- cli()/sti() removal guide.
computone.txt
- info on Computone Intelliport II/Plus Multiport Serial Driver.
connector/

315
Documentation/ABI/testing/sysfs-class-regulator Normal file
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@ -0,0 +1,315 @@
What: /sys/class/regulator/.../state
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
state. This holds the regulator output state.
This will be one of the following strings:
'enabled'
'disabled'
'unknown'
'enabled' means the regulator output is ON and is supplying
power to the system.
'disabled' means the regulator output is OFF and is not
supplying power to the system..
'unknown' means software cannot determine the state.
NOTE: this field can be used in conjunction with microvolts
and microamps to determine regulator output levels.
What: /sys/class/regulator/.../type
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
type. This holds the regulator type.
This will be one of the following strings:
'voltage'
'current'
'unknown'
'voltage' means the regulator output voltage can be controlled
by software.
'current' means the regulator output current limit can be
controlled by software.
'unknown' means software cannot control either voltage or
current limit.
What: /sys/class/regulator/.../microvolts
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
microvolts. This holds the regulator output voltage setting
measured in microvolts (i.e. E-6 Volts).
NOTE: This value should not be used to determine the regulator
output voltage level as this value is the same regardless of
whether the regulator is enabled or disabled.
What: /sys/class/regulator/.../microamps
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
microamps. This holds the regulator output current limit
setting measured in microamps (i.e. E-6 Amps).
NOTE: This value should not be used to determine the regulator
output current level as this value is the same regardless of
whether the regulator is enabled or disabled.
What: /sys/class/regulator/.../opmode
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
opmode. This holds the regulator operating mode setting.
The opmode value can be one of the following strings:
'fast'
'normal'
'idle'
'standby'
'unknown'
The modes are described in include/linux/regulator/regulator.h
NOTE: This value should not be used to determine the regulator
output operating mode as this value is the same regardless of
whether the regulator is enabled or disabled.
What: /sys/class/regulator/.../min_microvolts
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
min_microvolts. This holds the minimum safe working regulator
output voltage setting for this domain measured in microvolts.
NOTE: this will return the string 'constraint not defined' if
the power domain has no min microvolts constraint defined by
platform code.
What: /sys/class/regulator/.../max_microvolts
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
max_microvolts. This holds the maximum safe working regulator
output voltage setting for this domain measured in microvolts.
NOTE: this will return the string 'constraint not defined' if
the power domain has no max microvolts constraint defined by
platform code.
What: /sys/class/regulator/.../min_microamps
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
min_microamps. This holds the minimum safe working regulator
output current limit setting for this domain measured in
microamps.
NOTE: this will return the string 'constraint not defined' if
the power domain has no min microamps constraint defined by
platform code.
What: /sys/class/regulator/.../max_microamps
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
max_microamps. This holds the maximum safe working regulator
output current limit setting for this domain measured in
microamps.
NOTE: this will return the string 'constraint not defined' if
the power domain has no max microamps constraint defined by
platform code.
What: /sys/class/regulator/.../num_users
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
num_users. This holds the number of consumer devices that
have called regulator_enable() on this regulator.
What: /sys/class/regulator/.../requested_microamps
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
requested_microamps. This holds the total requested load
current in microamps for this regulator from all its consumer
devices.
What: /sys/class/regulator/.../parent
Date: April 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Some regulator directories will contain a link called parent.
This points to the parent or supply regulator if one exists.
What: /sys/class/regulator/.../suspend_mem_microvolts
Date: May 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
suspend_mem_microvolts. This holds the regulator output
voltage setting for this domain measured in microvolts when
the system is suspended to memory.
NOTE: this will return the string 'not defined' if
the power domain has no suspend to memory voltage defined by
platform code.
What: /sys/class/regulator/.../suspend_disk_microvolts
Date: May 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
suspend_disk_microvolts. This holds the regulator output
voltage setting for this domain measured in microvolts when
the system is suspended to disk.
NOTE: this will return the string 'not defined' if
the power domain has no suspend to disk voltage defined by
platform code.
What: /sys/class/regulator/.../suspend_standby_microvolts
Date: May 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
suspend_standby_microvolts. This holds the regulator output
voltage setting for this domain measured in microvolts when
the system is suspended to standby.
NOTE: this will return the string 'not defined' if
the power domain has no suspend to standby voltage defined by
platform code.
What: /sys/class/regulator/.../suspend_mem_mode
Date: May 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
suspend_mem_mode. This holds the regulator operating mode
setting for this domain when the system is suspended to
memory.
NOTE: this will return the string 'not defined' if
the power domain has no suspend to memory mode defined by
platform code.
What: /sys/class/regulator/.../suspend_disk_mode
Date: May 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
suspend_disk_mode. This holds the regulator operating mode
setting for this domain when the system is suspended to disk.
NOTE: this will return the string 'not defined' if
the power domain has no suspend to disk mode defined by
platform code.
What: /sys/class/regulator/.../suspend_standby_mode
Date: May 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
suspend_standby_mode. This holds the regulator operating mode
setting for this domain when the system is suspended to
standby.
NOTE: this will return the string 'not defined' if
the power domain has no suspend to standby mode defined by
platform code.
What: /sys/class/regulator/.../suspend_mem_state
Date: May 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
suspend_mem_state. This holds the regulator operating state
when suspended to memory.
This will be one of the following strings:
'enabled'
'disabled'
'not defined'
What: /sys/class/regulator/.../suspend_disk_state
Date: May 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
suspend_disk_state. This holds the regulator operating state
when suspended to disk.
This will be one of the following strings:
'enabled'
'disabled'
'not defined'
What: /sys/class/regulator/.../suspend_standby_state
Date: May 2008
KernelVersion: 2.6.26
Contact: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Description:
Each regulator directory will contain a field called
suspend_standby_state. This holds the regulator operating
state when suspended to standby.
This will be one of the following strings:
'enabled'
'disabled'
'not defined'

4
Documentation/DMA-API.txt
View File

@ -298,10 +298,10 @@ recommended that you never use these unless you really know what the
cache width is.
int
dma_mapping_error(dma_addr_t dma_addr)
dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
int
pci_dma_mapping_error(dma_addr_t dma_addr)
pci_dma_mapping_error(struct pci_dev *hwdev, dma_addr_t dma_addr)
In some circumstances dma_map_single and dma_map_page will fail to create
a mapping. A driver can check for these errors by testing the returned

9
Documentation/DocBook/Makefile
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@ -12,7 +12,7 @@ DOCBOOKS := wanbook.xml z8530book.xml mcabook.xml videobook.xml \
kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \
gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \
mac80211.xml debugobjects.xml
mac80211.xml debugobjects.xml sh.xml
###
# The build process is as follows (targets):
@ -102,6 +102,13 @@ C-procfs-example = procfs_example.xml
C-procfs-example2 = $(addprefix $(obj)/,$(C-procfs-example))
$(obj)/procfs-guide.xml: $(C-procfs-example2)
# List of programs to build
##oops, this is a kernel module::hostprogs-y := procfs_example
obj-m += procfs_example.o
# Tell kbuild to always build the programs
always := $(hostprogs-y)
notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
exit 1
db2xtemplate = db2TYPE -o $(dir $@) $<

18
Documentation/DocBook/kgdb.tmpl
View File

@ -98,6 +98,24 @@
"Kernel debugging" select "KGDB: kernel debugging with remote gdb".
</para>
<para>
It is advised, but not required that you turn on the
CONFIG_FRAME_POINTER kernel option. This option inserts code to
into the compiled executable which saves the frame information in
registers or on the stack at different points which will allow a
debugger such as gdb to more accurately construct stack back traces
while debugging the kernel.
</para>
<para>
If the architecture that you are using supports the kernel option
CONFIG_DEBUG_RODATA, you should consider turning it off. This
option will prevent the use of software breakpoints because it
marks certain regions of the kernel's memory space as read-only.
If kgdb supports it for the architecture you are using, you can
use hardware breakpoints if you desire to run with the
CONFIG_DEBUG_RODATA option turned on, else you need to turn off
this option.
</para>
<para>
Next you should choose one of more I/O drivers to interconnect debugging
host and debugged target. Early boot debugging requires a KGDB
I/O driver that supports early debugging and the driver must be

4
Documentation/DocBook/procfs_example.c
View File

@ -189,8 +189,6 @@ static int __init init_procfs_example(void)
return 0;
no_symlink:
remove_proc_entry("tty", example_dir);
no_tty:
remove_proc_entry("bar", example_dir);
no_bar:
remove_proc_entry("foo", example_dir);
@ -206,7 +204,6 @@ out:
static void __exit cleanup_procfs_example(void)
{
remove_proc_entry("jiffies_too", example_dir);
remove_proc_entry("tty", example_dir);
remove_proc_entry("bar", example_dir);
remove_proc_entry("foo", example_dir);
remove_proc_entry("jiffies", example_dir);
@ -222,3 +219,4 @@ module_exit(cleanup_procfs_example);
MODULE_AUTHOR("Erik Mouw");
MODULE_DESCRIPTION("procfs examples");
MODULE_LICENSE("GPL");

8
Documentation/DocBook/s390-drivers.tmpl
View File

@ -100,7 +100,7 @@
the hardware structures represented here, please consult the Principles
of Operation.
</para>
!Iinclude/asm-s390/cio.h
!Iarch/s390/include/asm/cio.h
</sect1>
<sect1 id="ccwdev">
<title>ccw devices</title>
@ -114,7 +114,7 @@
ccw device structure. Device drivers must not bypass those functions
or strange side effects may happen.
</para>
!Iinclude/asm-s390/ccwdev.h
!Iarch/s390/include/asm/ccwdev.h
!Edrivers/s390/cio/device.c
!Edrivers/s390/cio/device_ops.c
</sect1>
@ -125,7 +125,7 @@
measurement data which is made available by the channel subsystem
for each channel attached device.
</para>
!Iinclude/asm-s390/cmb.h
!Iarch/s390/include/asm/cmb.h
!Edrivers/s390/cio/cmf.c
</sect1>
</chapter>
@ -142,7 +142,7 @@
</para>
<sect1 id="ccwgroupdevices">
<title>ccw group devices</title>
!Iinclude/asm-s390/ccwgroup.h
!Iarch/s390/include/asm/ccwgroup.h
!Edrivers/s390/cio/ccwgroup.c
</sect1>
</chapter>

105
Documentation/DocBook/sh.tmpl Normal file
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@ -0,0 +1,105 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<book id="sh-drivers">
<bookinfo>
<title>SuperH Interfaces Guide</title>
<authorgroup>
<author>
<firstname>Paul</firstname>
<surname>Mundt</surname>
<affiliation>
<address>
<email>lethal@linux-sh.org</email>
</address>
</affiliation>
</author>
</authorgroup>
<copyright>
<year>2008</year>
<holder>Paul Mundt</holder>
</copyright>
<copyright>
<year>2008</year>
<holder>Renesas Technology Corp.</holder>
</copyright>
<legalnotice>
<para>
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License version 2 as published by the Free Software Foundation.
</para>
<para>
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
</para>
<para>
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
</para>
<para>
For more details see the file COPYING in the source
distribution of Linux.
</para>
</legalnotice>
</bookinfo>
<toc></toc>
<chapter id="mm">
<title>Memory Management</title>
<sect1 id="sh4">
<title>SH-4</title>
<sect2 id="sq">
<title>Store Queue API</title>
!Earch/sh/kernel/cpu/sh4/sq.c
</sect2>
</sect1>
<sect1 id="sh5">
<title>SH-5</title>
<sect2 id="tlb">
<title>TLB Interfaces</title>
!Iarch/sh/mm/tlb-sh5.c
!Iarch/sh/include/asm/tlb_64.h
</sect2>
</sect1>
</chapter>
<chapter id="clk">
<title>Clock Framework Extensions</title>
!Iarch/sh/include/asm/clock.h
</chapter>
<chapter id="mach">
<title>Machine Specific Interfaces</title>
<sect1 id="dreamcast">
<title>mach-dreamcast</title>
!Iarch/sh/boards/mach-dreamcast/rtc.c
</sect1>
<sect1 id="x3proto">
<title>mach-x3proto</title>
!Earch/sh/boards/mach-x3proto/ilsel.c
</sect1>
</chapter>
<chapter id="busses">
<title>Busses</title>
<sect1 id="superhyway">
<title>SuperHyway</title>
!Edrivers/sh/superhyway/superhyway.c
</sect1>
<sect1 id="maple">
<title>Maple</title>
!Edrivers/sh/maple/maple.c
</sect1>
</chapter>
</book>

2
Documentation/DocBook/videobook.tmpl
View File

@ -1648,7 +1648,7 @@ static struct video_buffer capture_fb;
<chapter id="pubfunctions">
<title>Public Functions Provided</title>
!Edrivers/media/video/videodev.c
!Edrivers/media/video/v4l2-dev.c
</chapter>
</book>

38
Documentation/DocBook/z8530book.tmpl
View File

@ -69,12 +69,6 @@
device to be used as both a tty interface and as a synchronous
controller is a project for Linux post the 2.4 release
</para>
<para>
The support code handles most common card configurations and
supports running both Cisco HDLC and Synchronous PPP. With extra
glue the frame relay and X.25 protocols can also be used with this
driver.
</para>
</chapter>
<chapter id="Driver_Modes">
@ -179,35 +173,27 @@
<para>
If you wish to use the network interface facilities of the driver,
then you need to attach a network device to each channel that is
present and in use. In addition to use the SyncPPP and Cisco HDLC
present and in use. In addition to use the generic HDLC
you need to follow some additional plumbing rules. They may seem
complex but a look at the example hostess_sv11 driver should
reassure you.
</para>
<para>
The network device used for each channel should be pointed to by
the netdevice field of each channel. The dev-&gt; priv field of the
the netdevice field of each channel. The hdlc-&gt; priv field of the
network device points to your private data - you will need to be
able to find your ppp device from this. In addition to use the
sync ppp layer the private data must start with a void * pointer
to the syncppp structures.
able to find your private data from this.
</para>
<para>
The way most drivers approach this particular problem is to
create a structure holding the Z8530 device definition and
put that and the syncppp pointer into the private field of
the network device. The network device fields of the channels
then point back to the network devices. The ppp_device can also
be put in the private structure conveniently.
put that into the private field of the network device. The
network device fields of the channels then point back to the
network devices.
</para>
<para>
If you wish to use the synchronous ppp then you need to attach
the syncppp layer to the network device. You should do this before
you register the network device. The
<function>sppp_attach</function> requires that the first void *
pointer in your private data is pointing to an empty struct
ppp_device. The function fills in the initial data for the
ppp/hdlc layer.
If you wish to use the generic HDLC then you need to register
the HDLC device.
</para>
<para>
Before you register your network device you will also need to
@ -314,10 +300,10 @@
buffer in sk_buff format and queues it for transmission. The
caller must provide the entire packet with the exception of the
bitstuffing and CRC. This is normally done by the caller via
the syncppp interface layer. It returns 0 if the buffer has been
queued and non zero values for queue full. If the function accepts
the buffer it becomes property of the Z8530 layer and the caller
should not free it.
the generic HDLC interface layer. It returns 0 if the buffer has been
queued and non zero values for queue full. If the function accepts
the buffer it becomes property of the Z8530 layer and the caller
should not free it.
</para>
<para>
The function <function>z8530_get_stats</function> returns a pointer

4
Documentation/Intel-IOMMU.txt
View File

@ -48,7 +48,7 @@ IOVA generation is pretty generic. We used the same technique as vmalloc()
but these are not global address spaces, but separate for each domain.
Different DMA engines may support different number of domains.
We also allocate gaurd pages with each mapping, so we can attempt to catch
We also allocate guard pages with each mapping, so we can attempt to catch
any overflow that might happen.
@ -112,4 +112,4 @@ TBD
- For compatibility testing, could use unity map domain for all devices, just
provide a 1-1 for all useful memory under a single domain for all devices.
- API for paravirt ops for abstracting functionlity for VMM folks.
- API for paravirt ops for abstracting functionality for VMM folks.

3
Documentation/Makefile Normal file
View File

@ -0,0 +1,3 @@
obj-m := DocBook/ accounting/ auxdisplay/ connector/ \
filesystems/configfs/ ia64/ networking/ \
pcmcia/ spi/ video4linux/ vm/ watchdog/src/

26
Documentation/SubmittingPatches
View File

@ -528,7 +528,33 @@ See more details on the proper patch format in the following
references.
16) Sending "git pull" requests (from Linus emails)
Please write the git repo address and branch name alone on the same line
so that I can't even by mistake pull from the wrong branch, and so
that a triple-click just selects the whole thing.
So the proper format is something along the lines of:
"Please pull from
git://jdelvare.pck.nerim.net/jdelvare-2.6 i2c-for-linus
to get these changes:"
so that I don't have to hunt-and-peck for the address and inevitably
get it wrong (actually, I've only gotten it wrong a few times, and
checking against the diffstat tells me when I get it wrong, but I'm
just a lot more comfortable when I don't have to "look for" the right
thing to pull, and double-check that I have the right branch-name).
Please use "git diff -M --stat --summary" to generate the diffstat:
the -M enables rename detection, and the summary enables a summary of
new/deleted or renamed files.
With rename detection, the statistics are rather different [...]
because git will notice that a fair number of the changes are renames.
-----------------------------------
SECTION 2 - HINTS, TIPS, AND TRICKS

10
Documentation/accounting/Makefile Normal file
View File

@ -0,0 +1,10 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := getdelays
# Tell kbuild to always build the programs
always := $(hostprogs-y)
HOSTCFLAGS_getdelays.o += -I$(objtree)/usr/include

25
Documentation/accounting/getdelays.c
View File

@ -201,13 +201,19 @@ void print_delayacct(struct taskstats *t)
"RECLAIM %12s%15s\n"
" %15llu%15llu\n",
"count", "real total", "virtual total", "delay total",
t->cpu_count, t->cpu_run_real_total, t->cpu_run_virtual_total,
t->cpu_delay_total,
(unsigned long long)t->cpu_count,
(unsigned long long)t->cpu_run_real_total,
(unsigned long long)t->cpu_run_virtual_total,
(unsigned long long)t->cpu_delay_total,
"count", "delay total",
t->blkio_count, t->blkio_delay_total,
"count", "delay total", t->swapin_count, t->swapin_delay_total,
(unsigned long long)t->blkio_count,
(unsigned long long)t->blkio_delay_total,
"count", "delay total",
t->freepages_count, t->freepages_delay_total);
(unsigned long long)t->swapin_count,
(unsigned long long)t->swapin_delay_total,
"count", "delay total",
(unsigned long long)t->freepages_count,
(unsigned long long)t->freepages_delay_total);
}
void task_context_switch_counts(struct taskstats *t)
@ -215,14 +221,17 @@ void task_context_switch_counts(struct taskstats *t)
printf("\n\nTask %15s%15s\n"
" %15llu%15llu\n",
"voluntary", "nonvoluntary",
t->nvcsw, t->nivcsw);
(unsigned long long)t->nvcsw, (unsigned long long)t->nivcsw);
}
void print_cgroupstats(struct cgroupstats *c)
{
printf("sleeping %llu, blocked %llu, running %llu, stopped %llu, "
"uninterruptible %llu\n", c->nr_sleeping, c->nr_io_wait,
c->nr_running, c->nr_stopped, c->nr_uninterruptible);
"uninterruptible %llu\n", (unsigned long long)c->nr_sleeping,
(unsigned long long)c->nr_io_wait,
(unsigned long long)c->nr_running,
(unsigned long long)c->nr_stopped,
(unsigned long long)c->nr_uninterruptible);
}

2
Documentation/accounting/taskstats-struct.txt
View File

@ -6,7 +6,7 @@ This document contains an explanation of the struct taskstats fields.
There are three different groups of fields in the struct taskstats:
1) Common and basic accounting fields
If CONFIG_TASKSTATS is set, the taskstats inteface is enabled and
If CONFIG_TASKSTATS is set, the taskstats interface is enabled and
the common fields and basic accounting fields are collected for
delivery at do_exit() of a task.
2) Delay accounting fields

2
Documentation/arm/IXP4xx
View File

@ -32,7 +32,7 @@ Linux currently supports the following features on the IXP4xx chips:
- Flash access (MTD/JFFS)
- I2C through GPIO on IXP42x
- GPIO for input/output/interrupts
See include/asm-arm/arch-ixp4xx/platform.h for access functions.
See arch/arm/mach-ixp4xx/include/mach/platform.h for access functions.
- Timers (watchdog, OS)
The following components of the chips are not supported by Linux and

12
Documentation/arm/Interrupts
View File

@ -138,14 +138,8 @@ So, what's changed?
Set active the IRQ edge(s)/level. This replaces the
SA1111 INTPOL manipulation, and the set_GPIO_IRQ_edge()
function. Type should be one of the following:
#define IRQT_NOEDGE (0)
#define IRQT_RISING (__IRQT_RISEDGE)
#define IRQT_FALLING (__IRQT_FALEDGE)
#define IRQT_BOTHEDGE (__IRQT_RISEDGE|__IRQT_FALEDGE)
#define IRQT_LOW (__IRQT_LOWLVL)
#define IRQT_HIGH (__IRQT_HIGHLVL)
function. Type should be one of IRQ_TYPE_xxx defined in
<linux/irq.h>
3. set_GPIO_IRQ_edge() is obsolete, and should be replaced by set_irq_type.
@ -164,7 +158,7 @@ So, what's changed?
be re-checked for pending events. (see the Neponset IRQ handler for
details).
7. fixup_irq() is gone, as is include/asm-arm/arch-*/irq.h
7. fixup_irq() is gone, as is arch/arm/mach-*/include/mach/irq.h
Please note that this will not solve all problems - some of them are
hardware based. Mixing level-based and edge-based IRQs on the same

4
Documentation/arm/README
View File

@ -79,7 +79,7 @@ Machine/Platform support
To this end, we now have arch/arm/mach-$(MACHINE) directories which are
designed to house the non-driver files for a particular machine (eg, PCI,
memory management, architecture definitions etc). For all future
machines, there should be a corresponding include/asm-arm/arch-$(MACHINE)
machines, there should be a corresponding arch/arm/mach-$(MACHINE)/include/mach
directory.
@ -176,7 +176,7 @@ Kernel entry (head.S)
class typically based around one or more system on a chip devices, and
acts as a natural container around the actual implementations. These
classes are given directories - arch/arm/mach-<class> and
include/asm-arm/arch-<class> - which contain the source files to
arch/arm/mach-<class> - which contain the source files to/include/mach
support the machine class. This directories also contain any machine
specific supporting code.

23
Documentation/arm/Samsung-S3C24XX/GPIO.txt
View File

@ -13,16 +13,31 @@ Introduction
data-sheet/users manual to find out the complete list.
GPIOLIB
-------
With the event of the GPIOLIB in drivers/gpio, support for some
of the GPIO functions such as reading and writing a pin will
be removed in favour of this common access method.
Once all the extant drivers have been converted, the functions
listed below will be removed (they may be marked as __deprecated
in the near future).
- s3c2410_gpio_getpin
- s3c2410_gpio_setpin
Headers
-------
See include/asm-arm/arch-s3c2410/regs-gpio.h for the list
See arch/arm/mach-s3c2410/include/mach/regs-gpio.h for the list
of GPIO pins, and the configuration values for them. This
is included by using #include <asm/arch/regs-gpio.h>
is included by using #include <mach/regs-gpio.h>
The GPIO management functions are defined in the hardware
header include/asm-arm/arch-s3c2410/hardware.h which can be
included by #include <asm/arch/hardware.h>
header arch/arm/mach-s3c2410/include/mach/hardware.h which can be
included by #include <mach/hardware.h>
A useful amount of documentation can be found in the hardware
header on how the GPIO functions (and others) work.

37
Documentation/arm/Samsung-S3C24XX/Overview.txt
View File

@ -8,9 +8,10 @@ Introduction
The Samsung S3C24XX range of ARM9 System-on-Chip CPUs are supported
by the 's3c2410' architecture of ARM Linux. Currently the S3C2410,
S3C2412, S3C2413, S3C2440 and S3C2442 devices are supported.
S3C2412, S3C2413, S3C2440, S3C2442 and S3C2443 devices are supported.
Support for the S3C2400 and S3C24A0 series are in progress.
Support for the S3C2400 series is in progress.
Configuration
-------------
@ -36,7 +37,23 @@ Layout
in arch/arm/mach-s3c2410 and S3C2440 in arch/arm/mach-s3c2440
Register, kernel and platform data definitions are held in the
include/asm-arm/arch-s3c2410 directory.
arch/arm/mach-s3c2410 directory./include/mach
arch/arm/plat-s3c24xx:
Files in here are either common to all the s3c24xx family,
or are common to only some of them with names to indicate this
status. The files that are not common to all are generally named
with the initial cpu they support in the series to ensure a short
name without any possibility of confusion with newer devices.
As an example, initially s3c244x would cover s3c2440 and s3c2442, but
with the s3c2443 which does not share many of the same drivers in
this directory, the name becomes invalid. We stick to s3c2440-<x>
to indicate a driver that is s3c2440 and s3c2442 compatible.
This does mean that to find the status of any given SoC, a number
of directories may need to be searched.
Machines
@ -159,6 +176,17 @@ NAND
For more information see Documentation/arm/Samsung-S3C24XX/NAND.txt
SD/MMC
------
The SD/MMC hardware pre S3C2443 is supported in the current
kernel, the driver is drivers/mmc/host/s3cmci.c and supports
1 and 4 bit SD or MMC cards.
The SDIO behaviour of this driver has not been fully tested. There is no
current support for hardware SDIO interrupts.
Serial
------
@ -178,6 +206,9 @@ GPIO
The core contains support for manipulating the GPIO, see the
documentation in GPIO.txt in the same directory as this file.
Newer kernels carry GPIOLIB, and support is being moved towards
this with some of the older support in line to be removed.
Clock Management
----------------

2
Documentation/arm/Samsung-S3C24XX/USB-Host.txt
View File

@ -49,7 +49,7 @@ Board Support
Platform Data
-------------
See linux/include/asm-arm/arch-s3c2410/usb-control.h for the
See arch/arm/mach-s3c2410/include/mach/usb-control.h for the
descriptions of the platform device data. An implementation
can be found in linux/arch/arm/mach-s3c2410/usb-simtec.c .

10
Documentation/auxdisplay/Makefile Normal file
View File

@ -0,0 +1,10 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := cfag12864b-example
# Tell kbuild to always build the programs
always := $(hostprogs-y)
HOSTCFLAGS_cfag12864b-example.o += -I$(objtree)/usr/include

21
Documentation/cciss.txt
View File

@ -112,27 +112,18 @@ Hot plug support for SCSI tape drives
Hot plugging of SCSI tape drives is supported, with some caveats.
The cciss driver must be informed that changes to the SCSI bus
have been made, in addition to and prior to informing the SCSI
mid layer. This may be done via the /proc filesystem. For example:
have been made. This may be done via the /proc filesystem.
For example:
echo "rescan" > /proc/scsi/cciss0/1
This causes the adapter to query the adapter about changes to the
physical SCSI buses and/or fibre channel arbitrated loop and the
This causes the driver to query the adapter about changes to the
physical SCSI buses and/or fibre channel arbitrated loop and the
driver to make note of any new or removed sequential access devices
or medium changers. The driver will output messages indicating what
devices have been added or removed and the controller, bus, target and
lun used to address the device. Once this is done, the SCSI mid layer
can be informed of changes to the virtual SCSI bus which the driver
presents to it in the usual way. For example:
echo scsi add-single-device 3 2 1 0 > /proc/scsi/scsi
to add a device on controller 3, bus 2, target 1, lun 0. Note that
the driver makes an effort to preserve the devices positions
in the virtual SCSI bus, so if you are only moving tape drives
around on the same adapter and not adding or removing tape drives
from the adapter, informing the SCSI mid layer may not be necessary.
lun used to address the device. It then notifies the SCSI mid layer
of these changes.
Note that the naming convention of the /proc filesystem entries
contains a number in addition to the driver name. (E.g. "cciss0"

133
Documentation/cli-sti-removal.txt
View File

@ -1,133 +0,0 @@
#### cli()/sti() removal guide, started by Ingo Molnar <mingo@redhat.com>
as of 2.5.28, five popular macros have been removed on SMP, and
are being phased out on UP:
cli(), sti(), save_flags(flags), save_flags_cli(flags), restore_flags(flags)
until now it was possible to protect driver code against interrupt
handlers via a cli(), but from now on other, more lightweight methods
have to be used for synchronization, such as spinlocks or semaphores.
for example, driver code that used to do something like:
struct driver_data;
irq_handler (...)
{
....
driver_data.finish = 1;
driver_data.new_work = 0;
....
}
...
ioctl_func (...)
{
...
cli();
...
driver_data.finish = 0;
driver_data.new_work = 2;
...
sti();
...
}
was SMP-correct because the cli() function ensured that no
interrupt handler (amongst them the above irq_handler()) function
would execute while the cli()-ed section is executing.
but from now on a more direct method of locking has to be used:
DEFINE_SPINLOCK(driver_lock);
struct driver_data;
irq_handler (...)
{
unsigned long flags;
....
spin_lock_irqsave(&driver_lock, flags);
....
driver_data.finish = 1;
driver_data.new_work = 0;
....
spin_unlock_irqrestore(&driver_lock, flags);
....
}
...
ioctl_func (...)
{
...
spin_lock_irq(&driver_lock);
...
driver_data.finish = 0;
driver_data.new_work = 2;
...
spin_unlock_irq(&driver_lock);
...
}
the above code has a number of advantages:
- the locking relation is easier to understand - actual lock usage
pinpoints the critical sections. cli() usage is too opaque.
Easier to understand means it's easier to debug.
- it's faster, because spinlocks are faster to acquire than the
potentially heavily-used IRQ lock. Furthermore, your driver does
not have to wait eg. for a big heavy SCSI interrupt to finish,
because the driver_lock spinlock is only used by your driver.
cli() on the other hand was used by many drivers, and extended
the critical section to the whole IRQ handler function - creating
serious lock contention.
to make the transition easier, we've still kept the cli(), sti(),
save_flags(), save_flags_cli() and restore_flags() macros defined
on UP systems - but their usage will be phased out until 2.6 is
released.
drivers that want to disable local interrupts (interrupts on the
current CPU), can use the following five macros:
local_irq_disable(), local_irq_enable(), local_save_flags(flags),
local_irq_save(flags), local_irq_restore(flags)
but beware, their meaning and semantics are much simpler, far from
that of the old cli(), sti(), save_flags(flags) and restore_flags(flags)
SMP meaning:
local_irq_disable() => turn local IRQs off
local_irq_enable() => turn local IRQs on
local_save_flags(flags) => save the current IRQ state into flags. The
state can be on or off. (on some
architectures there's even more bits in it.)
local_irq_save(flags) => save the current IRQ state into flags and
disable interrupts.
local_irq_restore(flags) => restore the IRQ state from flags.
(local_irq_save can save both irqs on and irqs off state, and
local_irq_restore can restore into both irqs on and irqs off state.)
another related change is that synchronize_irq() now takes a parameter:
synchronize_irq(irq). This change too has the purpose of making SMP
synchronization more lightweight - this way you can wait for your own
interrupt handler to finish, no need to wait for other IRQ sources.
why were these changes done? The main reason was the architectural burden
of maintaining the cli()/sti() interface - it became a real problem. The
new interrupt system is much more streamlined, easier to understand, debug,
and it's also a bit faster - the same happened to it that will happen to
cli()/sti() using drivers once they convert to spinlocks :-)

11
Documentation/connector/Makefile Normal file
View File

@ -0,0 +1,11 @@
ifneq ($(CONFIG_CONNECTOR),)
obj-m += cn_test.o
endif
# List of programs to build
hostprogs-y := ucon
# Tell kbuild to always build the programs
always := $(hostprogs-y)
HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include

2
Documentation/cpu-freq/governors.txt
View File

@ -122,7 +122,7 @@ around '10000' or more.
show_sampling_rate_(min|max): the minimum and maximum sampling rates
available that you may set 'sampling_rate' to.
up_threshold: defines what the average CPU usaged between the samplings
up_threshold: defines what the average CPU usage between the samplings
of 'sampling_rate' needs to be for the kernel to make a decision on
whether it should increase the frequency. For example when it is set
to its default value of '80' it means that between the checking

5
Documentation/cpu-hotplug.txt
View File

@ -59,15 +59,10 @@ apicid values in those tables for disabled apics. In the event BIOS doesn't
mark such hot-pluggable cpus as disabled entries, one could use this
parameter "additional_cpus=x" to represent those cpus in the cpu_possible_map.
s390 uses the number of cpus it detects at IPL time to also the number of bits
in cpu_possible_map. If it is desired to add additional cpus at a later time
the number should be specified using this option or the possible_cpus option.
possible_cpus=n [s390 only] use this to set hotpluggable cpus.
This option sets possible_cpus bits in
cpu_possible_map. Thus keeping the numbers of bits set
constant even if the machine gets rebooted.
This option overrides additional_cpus.
CPU maps and such
-----------------

3
Documentation/devices.txt
View File

@ -2560,9 +2560,6 @@ Your cooperation is appreciated.
96 = /dev/usb/hiddev0 1st USB HID device
...
111 = /dev/usb/hiddev15 16th USB HID device
112 = /dev/usb/auer0 1st auerswald ISDN device
...
127 = /dev/usb/auer15 16th auerswald ISDN device
128 = /dev/usb/brlvgr0 First Braille Voyager device
...
131 = /dev/usb/brlvgr3 Fourth Braille Voyager device

2
Documentation/edac.txt
View File

@ -327,7 +327,7 @@ Sdram memory scrubbing rate:
'sdram_scrub_rate'
Read/Write attribute file that controls memory scrubbing. The scrubbing
rate is set by writing a minimum bandwith in bytes/sec to the attribute
rate is set by writing a minimum bandwidth in bytes/sec to the attribute
file. The rate will be translated to an internal value that gives at
least the specified rate.

46
Documentation/feature-removal-schedule.txt
View File

@ -19,15 +19,6 @@ Who: Pavel Machek <pavel@suse.cz>
---------------------------
What: old NCR53C9x driver
When: October 2007
Why: Replaced by the much better esp_scsi driver. Actual low-level
driver can be ported over almost trivially.
Who: David Miller <davem@davemloft.net>
Christoph Hellwig <hch@lst.de>
---------------------------
What: Video4Linux API 1 ioctls and video_decoder.h from Video devices.
When: December 2008
Files: include/linux/video_decoder.h include/linux/videodev.h
@ -47,6 +38,30 @@ Who: Mauro Carvalho Chehab <mchehab@infradead.org>
---------------------------
What: old tuner-3036 i2c driver
When: 2.6.28
Why: This driver is for VERY old i2c-over-parallel port teletext receiver
boxes. Rather then spending effort on converting this driver to V4L2,
and since it is extremely unlikely that anyone still uses one of these
devices, it was decided to drop it.
Who: Hans Verkuil <hverkuil@xs4all.nl>
Mauro Carvalho Chehab <mchehab@infradead.org>
---------------------------
What: V4L2 dpc7146 driver
When: 2.6.28
Why: Old driver for the dpc7146 demonstration board that is no longer
relevant. The last time this was tested on actual hardware was
probably around 2002. Since this is a driver for a demonstration
board the decision was made to remove it rather than spending a
lot of effort continually updating this driver to stay in sync
with the latest internal V4L2 or I2C API.
Who: Hans Verkuil <hverkuil@xs4all.nl>
Mauro Carvalho Chehab <mchehab@infradead.org>
---------------------------
What: PCMCIA control ioctl (needed for pcmcia-cs [cardmgr, cardctl])
When: November 2005
Files: drivers/pcmcia/: pcmcia_ioctl.c
@ -181,19 +196,6 @@ Who: Tejun Heo <htejun@gmail.com>
---------------------------
What: The arch/ppc and include/asm-ppc directories
When: Jun 2008
Why: The arch/powerpc tree is the merged architecture for ppc32 and ppc64
platforms. Currently there are efforts underway to port the remaining
arch/ppc platforms to the merged tree. New submissions to the arch/ppc
tree have been frozen with the 2.6.22 kernel release and that tree will
remain in bug-fix only mode until its scheduled removal. Platforms
that are not ported by June 2008 will be removed due to the lack of an
interested maintainer.
Who: linuxppc-dev@ozlabs.org
---------------------------
What: i386/x86_64 bzImage symlinks
When: April 2010

3
Documentation/filesystems/configfs/Makefile Normal file
View File

@ -0,0 +1,3 @@
ifneq ($(CONFIG_CONFIGFS_FS),)
obj-m += configfs_example_explicit.o configfs_example_macros.o
endif

17
Documentation/filesystems/configfs/configfs.txt
View File

@ -311,9 +311,20 @@ the subsystem must be ready for it.
[An Example]
The best example of these basic concepts is the simple_children
subsystem/group and the simple_child item in configfs_example.c It
shows a trivial object displaying and storing an attribute, and a simple
group creating and destroying these children.
subsystem/group and the simple_child item in configfs_example_explicit.c
and configfs_example_macros.c. It shows a trivial object displaying and
storing an attribute, and a simple group creating and destroying these
children.
The only difference between configfs_example_explicit.c and
configfs_example_macros.c is how the attributes of the childless item
are defined. The childless item has extended attributes, each with
their own show()/store() operation. This follows a convention commonly
used in sysfs. configfs_example_explicit.c creates these attributes
by explicitly defining the structures involved. Conversely
configfs_example_macros.c uses some convenience macros from configfs.h
to define the attributes. These macros are similar to their sysfs
counterparts.
[Hierarchy Navigation and the Subsystem Mutex]

18
Documentation/filesystems/configfs/configfs_example.c → Documentation/filesystems/configfs/configfs_example_explicit.c
View File

@ -1,8 +1,10 @@
/*
* vim: noexpandtab ts=8 sts=0 sw=8:
*
* configfs_example.c - This file is a demonstration module containing
* a number of configfs subsystems.
* configfs_example_explicit.c - This file is a demonstration module
* containing a number of configfs subsystems. It explicitly defines
* each structure without using the helper macros defined in
* configfs.h.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
@ -281,7 +283,6 @@ static struct config_item *simple_children_make_item(struct config_group *group,
if (!simple_child)
return ERR_PTR(-ENOMEM);
config_item_init_type_name(&simple_child->item, name,
&simple_child_type);
@ -302,8 +303,8 @@ static struct configfs_attribute *simple_children_attrs[] = {
};
static ssize_t simple_children_attr_show(struct config_item *item,
struct configfs_attribute *attr,
char *page)
struct configfs_attribute *attr,
char *page)
{
return sprintf(page,
"[02-simple-children]\n"
@ -318,7 +319,7 @@ static void simple_children_release(struct config_item *item)
}
static struct configfs_item_operations simple_children_item_ops = {
.release = simple_children_release,
.release = simple_children_release,
.show_attribute = simple_children_attr_show,
};
@ -368,7 +369,6 @@ static struct config_group *group_children_make_group(struct config_group *group
if (!simple_children)
return ERR_PTR(-ENOMEM);
config_group_init_type_name(&simple_children->group, name,
&simple_children_type);
@ -387,8 +387,8 @@ static struct configfs_attribute *group_children_attrs[] = {
};
static ssize_t group_children_attr_show(struct config_item *item,
struct configfs_attribute *attr,
char *page)
struct configfs_attribute *attr,
char *page)
{
return sprintf(page,
"[03-group-children]\n"

448
Documentation/filesystems/configfs/configfs_example_macros.c Normal file
View File

@ -0,0 +1,448 @@
/*
* vim: noexpandtab ts=8 sts=0 sw=8:
*
* configfs_example_macros.c - This file is a demonstration module
* containing a number of configfs subsystems. It uses the helper
* macros defined by configfs.h
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*
* Based on sysfs:
* sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
*
* configfs Copyright (C) 2005 Oracle. All rights reserved.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/configfs.h>
/*
* 01-childless
*
* This first example is a childless subsystem. It cannot create
* any config_items. It just has attributes.
*
* Note that we are enclosing the configfs_subsystem inside a container.
* This is not necessary if a subsystem has no attributes directly
* on the subsystem. See the next example, 02-simple-children, for
* such a subsystem.
*/
struct childless {
struct configfs_subsystem subsys;
int showme;
int storeme;
};
static inline struct childless *to_childless(struct config_item *item)
{
return item ? container_of(to_configfs_subsystem(to_config_group(item)), struct childless, subsys) : NULL;
}
CONFIGFS_ATTR_STRUCT(childless);
#define CHILDLESS_ATTR(_name, _mode, _show, _store) \
struct childless_attribute childless_attr_##_name = __CONFIGFS_ATTR(_name, _mode, _show, _store)
#define CHILDLESS_ATTR_RO(_name, _show) \
struct childless_attribute childless_attr_##_name = __CONFIGFS_ATTR_RO(_name, _show);
static ssize_t childless_showme_read(struct childless *childless,
char *page)
{
ssize_t pos;
pos = sprintf(page, "%d\n", childless->showme);
childless->showme++;
return pos;
}
static ssize_t childless_storeme_read(struct childless *childless,
char *page)
{
return sprintf(page, "%d\n", childless->storeme);
}
static ssize_t childless_storeme_write(struct childless *childless,
const char *page,
size_t count)
{
unsigned long tmp;
char *p = (char *) page;
tmp = simple_strtoul(p, &p, 10);
if (!p || (*p && (*p != '\n')))
return -EINVAL;
if (tmp > INT_MAX)
return -ERANGE;
childless->storeme = tmp;
return count;
}
static ssize_t childless_description_read(struct childless *childless,
char *page)
{
return sprintf(page,
"[01-childless]\n"
"\n"
"The childless subsystem is the simplest possible subsystem in\n"
"configfs. It does not support the creation of child config_items.\n"
"It only has a few attributes. In fact, it isn't much different\n"
"than a directory in /proc.\n");
}
CHILDLESS_ATTR_RO(showme, childless_showme_read);
CHILDLESS_ATTR(storeme, S_IRUGO | S_IWUSR, childless_storeme_read,
childless_storeme_write);
CHILDLESS_ATTR_RO(description, childless_description_read);
static struct configfs_attribute *childless_attrs[] = {
&childless_attr_showme.attr,
&childless_attr_storeme.attr,
&childless_attr_description.attr,
NULL,
};
CONFIGFS_ATTR_OPS(childless);
static struct configfs_item_operations childless_item_ops = {
.show_attribute = childless_attr_show,
.store_attribute = childless_attr_store,
};
static struct config_item_type childless_type = {
.ct_item_ops = &childless_item_ops,
.ct_attrs = childless_attrs,
.ct_owner = THIS_MODULE,
};
static struct childless childless_subsys = {
.subsys = {
.su_group = {
.cg_item = {
.ci_namebuf = "01-childless",
.ci_type = &childless_type,
},
},
},
};
/* ----------------------------------------------------------------- */
/*
* 02-simple-children
*
* This example merely has a simple one-attribute child. Note that
* there is no extra attribute structure, as the child's attribute is
* known from the get-go. Also, there is no container for the
* subsystem, as it has no attributes of its own.
*/
struct simple_child {
struct config_item item;
int storeme;
};
static inline struct simple_child *to_simple_child(struct config_item *item)
{
return item ? container_of(item, struct simple_child, item) : NULL;
}
static struct configfs_attribute simple_child_attr_storeme = {
.ca_owner = THIS_MODULE,
.ca_name = "storeme",
.ca_mode = S_IRUGO | S_IWUSR,
};
static struct configfs_attribute *simple_child_attrs[] = {
&simple_child_attr_storeme,
NULL,
};
static ssize_t simple_child_attr_show(struct config_item *item,
struct configfs_attribute *attr,
char *page)
{
ssize_t count;
struct simple_child *simple_child = to_simple_child(item);
count = sprintf(page, "%d\n", simple_child->storeme);
return count;
}
static ssize_t simple_child_attr_store(struct config_item *item,
struct configfs_attribute *attr,
const char *page, size_t count)
{
struct simple_child *simple_child = to_simple_child(item);
unsigned long tmp;
char *p = (char *) page;
tmp = simple_strtoul(p, &p, 10);
if (!p || (*p && (*p != '\n')))
return -EINVAL;
if (tmp > INT_MAX)
return -ERANGE;
simple_child->storeme = tmp;
return count;
}
static void simple_child_release(struct config_item *item)
{
kfree(to_simple_child(item));
}
static struct configfs_item_operations simple_child_item_ops = {
.release = simple_child_release,
.show_attribute = simple_child_attr_show,
.store_attribute = simple_child_attr_store,
};
static struct config_item_type simple_child_type = {
.ct_item_ops = &simple_child_item_ops,
.ct_attrs = simple_child_attrs,
.ct_owner = THIS_MODULE,
};
struct simple_children {
struct config_group group;
};
static inline struct simple_children *to_simple_children(struct config_item *item)
{
return item ? container_of(to_config_group(item), struct simple_children, group) : NULL;
}
static struct config_item *simple_children_make_item(struct config_group *group, const char *name)
{
struct simple_child *simple_child;
simple_child = kzalloc(sizeof(struct simple_child), GFP_KERNEL);
if (!simple_child)
return ERR_PTR(-ENOMEM);
config_item_init_type_name(&simple_child->item, name,
&simple_child_type);
simple_child->storeme = 0;
return &simple_child->item;
}
static struct configfs_attribute simple_children_attr_description = {
.ca_owner = THIS_MODULE,
.ca_name = "description",
.ca_mode = S_IRUGO,
};
static struct configfs_attribute *simple_children_attrs[] = {
&simple_children_attr_description,
NULL,
};
static ssize_t simple_children_attr_show(struct config_item *item,
struct configfs_attribute *attr,
char *page)
{
return sprintf(page,
"[02-simple-children]\n"
"\n"
"This subsystem allows the creation of child config_items. These\n"
"items have only one attribute that is readable and writeable.\n");
}
static void simple_children_release(struct config_item *item)
{
kfree(to_simple_children(item));
}
static struct configfs_item_operations simple_children_item_ops = {
.release = simple_children_release,
.show_attribute = simple_children_attr_show,
};
/*
* Note that, since no extra work is required on ->drop_item(),
* no ->drop_item() is provided.
*/
static struct configfs_group_operations simple_children_group_ops = {
.make_item = simple_children_make_item,
};
static struct config_item_type simple_children_type = {
.ct_item_ops = &simple_children_item_ops,
.ct_group_ops = &simple_children_group_ops,
.ct_attrs = simple_children_attrs,
.ct_owner = THIS_MODULE,
};
static struct configfs_subsystem simple_children_subsys = {
.su_group = {
.cg_item = {
.ci_namebuf = "02-simple-children",
.ci_type = &simple_children_type,
},
},
};
/* ----------------------------------------------------------------- */
/*
* 03-group-children
*
* This example reuses the simple_children group from above. However,
* the simple_children group is not the subsystem itself, it is a
* child of the subsystem. Creation of a group in the subsystem creates
* a new simple_children group. That group can then have simple_child
* children of its own.
*/
static struct config_group *group_children_make_group(struct config_group *group, const char *name)
{
struct simple_children *simple_children;
simple_children = kzalloc(sizeof(struct simple_children),
GFP_KERNEL);
if (!simple_children)
return ERR_PTR(-ENOMEM);
config_group_init_type_name(&simple_children->group, name,
&simple_children_type);
return &simple_children->group;
}
static struct configfs_attribute group_children_attr_description = {
.ca_owner = THIS_MODULE,
.ca_name = "description",
.ca_mode = S_IRUGO,
};
static struct configfs_attribute *group_children_attrs[] = {
&group_children_attr_description,
NULL,
};
static ssize_t group_children_attr_show(struct config_item *item,
struct configfs_attribute *attr,
char *page)
{
return sprintf(page,
"[03-group-children]\n"
"\n"
"This subsystem allows the creation of child config_groups. These\n"
"groups are like the subsystem simple-children.\n");
}
static struct configfs_item_operations group_children_item_ops = {
.show_attribute = group_children_attr_show,
};
/*
* Note that, since no extra work is required on ->drop_item(),
* no ->drop_item() is provided.
*/
static struct configfs_group_operations group_children_group_ops = {
.make_group = group_children_make_group,
};
static struct config_item_type group_children_type = {
.ct_item_ops = &group_children_item_ops,
.ct_group_ops = &group_children_group_ops,
.ct_attrs = group_children_attrs,
.ct_owner = THIS_MODULE,
};
static struct configfs_subsystem group_children_subsys = {
.su_group = {
.cg_item = {
.ci_namebuf = "03-group-children",
.ci_type = &group_children_type,
},
},
};
/* ----------------------------------------------------------------- */
/*
* We're now done with our subsystem definitions.
* For convenience in this module, here's a list of them all. It
* allows the init function to easily register them. Most modules
* will only have one subsystem, and will only call register_subsystem
* on it directly.
*/
static struct configfs_subsystem *example_subsys[] = {
&childless_subsys.subsys,
&simple_children_subsys,
&group_children_subsys,
NULL,
};
static int __init configfs_example_init(void)
{
int ret;
int i;
struct configfs_subsystem *subsys;
for (i = 0; example_subsys[i]; i++) {
subsys = example_subsys[i];
config_group_init(&subsys->su_group);
mutex_init(&subsys->su_mutex);
ret = configfs_register_subsystem(subsys);
if (ret) {
printk(KERN_ERR "Error %d while registering subsystem %s\n",
ret,
subsys->su_group.cg_item.ci_namebuf);
goto out_unregister;
}
}
return 0;
out_unregister:
for (; i >= 0; i--) {
configfs_unregister_subsystem(example_subsys[i]);
}
return ret;
}
static void __exit configfs_example_exit(void)
{
int i;
for (i = 0; example_subsys[i]; i++) {
configfs_unregister_subsystem(example_subsys[i]);
}
}
module_init(configfs_example_init);
module_exit(configfs_example_exit);
MODULE_LICENSE("GPL");

106
Documentation/filesystems/omfs.txt Normal file
View File

@ -0,0 +1,106 @@
Optimized MPEG Filesystem (OMFS)
Overview
========
OMFS is a filesystem created by SonicBlue for use in the ReplayTV DVR
and Rio Karma MP3 player. The filesystem is extent-based, utilizing
block sizes from 2k to 8k, with hash-based directories. This
filesystem driver may be used to read and write disks from these
devices.
Note, it is not recommended that this FS be used in place of a general
filesystem for your own streaming media device. Native Linux filesystems
will likely perform better.
More information is available at:
http://linux-karma.sf.net/
Various utilities, including mkomfs and omfsck, are included with
omfsprogs, available at:
http://bobcopeland.com/karma/
Instructions are included in its README.
Options
=======
OMFS supports the following mount-time options:
uid=n - make all files owned by specified user
gid=n - make all files owned by specified group
umask=xxx - set permission umask to xxx
fmask=xxx - set umask to xxx for files
dmask=xxx - set umask to xxx for directories
Disk format
===========
OMFS discriminates between "sysblocks" and normal data blocks. The sysblock
group consists of super block information, file metadata, directory structures,
and extents. Each sysblock has a header containing CRCs of the entire
sysblock, and may be mirrored in successive blocks on the disk. A sysblock may
have a smaller size than a data block, but since they are both addressed by the
same 64-bit block number, any remaining space in the smaller sysblock is
unused.
Sysblock header information:
struct omfs_header {
__be64 h_self; /* FS block where this is located */
__be32 h_body_size; /* size of useful data after header */
__be16 h_crc; /* crc-ccitt of body_size bytes */
char h_fill1[2];
u8 h_version; /* version, always 1 */
char h_type; /* OMFS_INODE_X */
u8 h_magic; /* OMFS_IMAGIC */
u8 h_check_xor; /* XOR of header bytes before this */
__be32 h_fill2;
};
Files and directories are both represented by omfs_inode:
struct omfs_inode {
struct omfs_header i_head; /* header */
__be64 i_parent; /* parent containing this inode */
__be64 i_sibling; /* next inode in hash bucket */
__be64 i_ctime; /* ctime, in milliseconds */
char i_fill1[35];
char i_type; /* OMFS_[DIR,FILE] */
__be32 i_fill2;
char i_fill3[64];
char i_name[OMFS_NAMELEN]; /* filename */
__be64 i_size; /* size of file, in bytes */
};
Directories in OMFS are implemented as a large hash table. Filenames are
hashed then prepended into the bucket list beginning at OMFS_DIR_START.
Lookup requires hashing the filename, then seeking across i_sibling pointers
until a match is found on i_name. Empty buckets are represented by block
pointers with all-1s (~0).
A file is an omfs_inode structure followed by an extent table beginning at
OMFS_EXTENT_START:
struct omfs_extent_entry {
__be64 e_cluster; /* start location of a set of blocks */
__be64 e_blocks; /* number of blocks after e_cluster */
};
struct omfs_extent {
__be64 e_next; /* next extent table location */
__be32 e_extent_count; /* total # extents in this table */
__be32 e_fill;
struct omfs_extent_entry e_entry; /* start of extent entries */
};
Each extent holds the block offset followed by number of blocks allocated to
the extent. The final extent in each table is a terminator with e_cluster
being ~0 and e_blocks being ones'-complement of the total number of blocks
in the table.
If this table overflows, a continuation inode is written and pointed to by
e_next. These have a header but lack the rest of the inode structure.

4
Documentation/filesystems/proc.txt
View File

@ -931,7 +931,7 @@ group_prealloc max_to_scan mb_groups mb_history min_to_scan order2_req
stats stream_req
mb_groups:
This file gives the details of mutiblock allocator buddy cache of free blocks
This file gives the details of multiblock allocator buddy cache of free blocks
mb_history:
Multiblock allocation history.
@ -1474,7 +1474,7 @@ used because pages_free(1355) is smaller than watermark + protection[2]
normal page requirement. If requirement is DMA zone(index=0), protection[0]
(=0) is used.
zone[i]'s protection[j] is calculated by following exprssion.
zone[i]'s protection[j] is calculated by following expression.
(i < j):
zone[i]->protection[j]

22
Documentation/filesystems/quota.txt
View File

@ -3,14 +3,14 @@ Quota subsystem
===============
Quota subsystem allows system administrator to set limits on used space and
number of used inodes (inode is a filesystem structure which is associated
with each file or directory) for users and/or groups. For both used space and
number of used inodes there are actually two limits. The first one is called
softlimit and the second one hardlimit. An user can never exceed a hardlimit
for any resource. User is allowed to exceed softlimit but only for limited
period of time. This period is called "grace period" or "grace time". When
grace time is over, user is not able to allocate more space/inodes until he
frees enough of them to get below softlimit.
number of used inodes (inode is a filesystem structure which is associated with
each file or directory) for users and/or groups. For both used space and number
of used inodes there are actually two limits. The first one is called softlimit
and the second one hardlimit. An user can never exceed a hardlimit for any
resource (unless he has CAP_SYS_RESOURCE capability). User is allowed to exceed
softlimit but only for limited period of time. This period is called "grace
period" or "grace time". When grace time is over, user is not able to allocate
more space/inodes until he frees enough of them to get below softlimit.
Quota limits (and amount of grace time) are set independently for each
filesystem.
@ -53,6 +53,12 @@ in parentheses):
QUOTA_NL_BSOFTLONGWARN - space (block) softlimit is exceeded
longer than given grace period.
QUOTA_NL_BSOFTWARN - space (block) softlimit
- four warnings are also defined for the event when user stops
exceeding some limit:
QUOTA_NL_IHARDBELOW - inode hardlimit
QUOTA_NL_ISOFTBELOW - inode softlimit
QUOTA_NL_BHARDBELOW - space (block) hardlimit
QUOTA_NL_BSOFTBELOW - space (block) softlimit
QUOTA_NL_A_DEV_MAJOR (u32)
- major number of a device with the affected filesystem
QUOTA_NL_A_DEV_MINOR (u32)

10
Documentation/filesystems/relay.txt
View File

@ -294,6 +294,16 @@ user-defined data with a channel, and is immediately available
(including in create_buf_file()) via chan->private_data or
buf->chan->private_data.
Buffer-only channels
--------------------
These channels have no files associated and can be created with
relay_open(NULL, NULL, ...). Such channels are useful in scenarios such
as when doing early tracing in the kernel, before the VFS is up. In these
cases, one may open a buffer-only channel and then call
relay_late_setup_files() when the kernel is ready to handle files,
to expose the buffered data to the userspace.
Channel 'modes'
---------------

2
Documentation/filesystems/ubifs.txt
View File

@ -57,7 +57,7 @@ Similarly to JFFS2, UBIFS supports on-the-flight compression which makes
it possible to fit quite a lot of data to the flash.
Similarly to JFFS2, UBIFS is tolerant of unclean reboots and power-cuts.
It does not need stuff like ckfs.ext2. UBIFS automatically replays its
It does not need stuff like fsck.ext2. UBIFS automatically replays its
journal and recovers from crashes, ensuring that the on-flash data
structures are consistent.

6
Documentation/filesystems/vfs.txt
View File

@ -143,7 +143,7 @@ struct file_system_type {
The get_sb() method has the following arguments:
struct file_system_type *fs_type: decribes the filesystem, partly initialized
struct file_system_type *fs_type: describes the filesystem, partly initialized
by the specific filesystem code
int flags: mount flags
@ -895,9 +895,9 @@ struct dentry_operations {
iput() yourself
d_dname: called when the pathname of a dentry should be generated.
Usefull for some pseudo filesystems (sockfs, pipefs, ...) to delay
Useful for some pseudo filesystems (sockfs, pipefs, ...) to delay
pathname generation. (Instead of doing it when dentry is created,
its done only when the path is needed.). Real filesystems probably
it's done only when the path is needed.). Real filesystems probably
dont want to use it, because their dentries are present in global
dcache hash, so their hash should be an invariant. As no lock is
held, d_dname() should not try to modify the dentry itself, unless

1
Documentation/ftrace.txt
View File

@ -4,6 +4,7 @@
Copyright 2008 Red Hat Inc.
Author: Steven Rostedt <srostedt@redhat.com>
License: The GNU Free Documentation License, Version 1.2
(dual licensed under the GPL v2)
Reviewers: Elias Oltmanns, Randy Dunlap, Andrew Morton,
John Kacur, and David Teigland.

57
Documentation/hwmon/dme1737
View File

@ -10,6 +10,10 @@ Supported chips:
Prefix: 'sch311x'
Addresses scanned: none, address read from Super-I/O config space
Datasheet: http://www.nuhorizons.com/FeaturedProducts/Volume1/SMSC/311x.pdf
* SMSC SCH5027
Prefix: 'sch5027'
Addresses scanned: I2C 0x2c, 0x2d, 0x2e
Datasheet: Provided by SMSC upon request and under NDA
Authors:
Juerg Haefliger <juergh@gmail.com>
@ -22,34 +26,36 @@ Module Parameters
and PWM output control functions. Using this parameter
shouldn't be required since the BIOS usually takes care
of this.
Note that there is no need to use this parameter if the driver loads without
complaining. The driver will say so if it is necessary.
* probe_all_addr: bool Include non-standard LPC addresses 0x162e and 0x164e
when probing for ISA devices. This is required for the
following boards:
- VIA EPIA SN18000
Description
-----------
This driver implements support for the hardware monitoring capabilities of the
SMSC DME1737 and Asus A8000 (which are the same) and SMSC SCH311x Super-I/O
chips. These chips feature monitoring of 3 temp sensors temp[1-3] (2 remote
diodes and 1 internal), 7 voltages in[0-6] (6 external and 1 internal) and up
to 6 fan speeds fan[1-6]. Additionally, the chips implement up to 5 PWM
outputs pwm[1-3,5-6] for controlling fan speeds both manually and
SMSC DME1737 and Asus A8000 (which are the same), SMSC SCH5027, and SMSC
SCH311x Super-I/O chips. These chips feature monitoring of 3 temp sensors
temp[1-3] (2 remote diodes and 1 internal), 7 voltages in[0-6] (6 external and
1 internal) and up to 6 fan speeds fan[1-6]. Additionally, the chips implement
up to 5 PWM outputs pwm[1-3,5-6] for controlling fan speeds both manually and
automatically.
For the DME1737 and A8000, fan[1-2] and pwm[1-2] are always present. Fan[3-6]
and pwm[3,5-6] are optional features and their availability depends on the
configuration of the chip. The driver will detect which features are present
during initialization and create the sysfs attributes accordingly.
For the DME1737, A8000 and SCH5027, fan[1-2] and pwm[1-2] are always present.
Fan[3-6] and pwm[3,5-6] are optional features and their availability depends on
the configuration of the chip. The driver will detect which features are
present during initialization and create the sysfs attributes accordingly.
For the SCH311x, fan[1-3] and pwm[1-3] are always present and fan[4-6] and
pwm[5-6] don't exist.
The hardware monitoring features of the DME1737 and A8000 are only accessible
via SMBus, while the SCH311x only provides access via the ISA bus. The driver
will therefore register itself as an I2C client driver if it detects a DME1737
or A8000 and as a platform driver if it detects a SCH311x chip.
The hardware monitoring features of the DME1737, A8000, and SCH5027 are only
accessible via SMBus, while the SCH311x only provides access via the ISA bus.
The driver will therefore register itself as an I2C client driver if it detects
a DME1737, A8000, or SCH5027 and as a platform driver if it detects a SCH311x
chip.
Voltage Monitoring
@ -60,6 +66,7 @@ scaling resistors. The values returned by the driver therefore reflect true
millivolts and don't need scaling. The voltage inputs are mapped as follows
(the last column indicates the input ranges):
DME1737, A8000:
in0: +5VTR (+5V standby) 0V - 6.64V
in1: Vccp (processor core) 0V - 3V
in2: VCC (internal +3.3V) 0V - 4.38V
@ -68,6 +75,24 @@ millivolts and don't need scaling. The voltage inputs are mapped as follows
in5: VTR (+3.3V standby) 0V - 4.38V
in6: Vbat (+3.0V) 0V - 4.38V
SCH311x:
in0: +2.5V 0V - 6.64V
in1: Vccp (processor core) 0V - 2V
in2: VCC (internal +3.3V) 0V - 4.38V
in3: +5V 0V - 6.64V
in4: +12V 0V - 16V
in5: VTR (+3.3V standby) 0V - 4.38V
in6: Vbat (+3.0V) 0V - 4.38V
SCH5027:
in0: +5VTR (+5V standby) 0V - 6.64V
in1: Vccp (processor core) 0V - 3V
in2: VCC (internal +3.3V) 0V - 4.38V
in3: V2_IN 0V - 1.5V
in4: V1_IN 0V - 1.5V
in5: VTR (+3.3V standby) 0V - 4.38V
in6: Vbat (+3.0V) 0V - 4.38V
Each voltage input has associated min and max limits which trigger an alarm
when crossed.

33
Documentation/hwmon/ibmaem
View File

@ -1,8 +1,11 @@
Kernel driver ibmaem
======================
This driver talks to the IBM Systems Director Active Energy Manager, known
henceforth as AEM.
Supported systems:
* Any recent IBM System X server with Active Energy Manager support.
* Any recent IBM System X server with AEM support.
This includes the x3350, x3550, x3650, x3655, x3755, x3850 M2,
x3950 M2, and certain HS2x/LS2x/QS2x blades. The IPMI host interface
driver ("ipmi-si") needs to be loaded for this driver to do anything.
@ -14,24 +17,22 @@ Author: Darrick J. Wong
Description
-----------
This driver implements sensor reading support for the energy and power
meters available on various IBM System X hardware through the BMC. All
sensor banks will be exported as platform devices; this driver can talk
to both v1 and v2 interfaces. This driver is completely separate from the
older ibmpex driver.
This driver implements sensor reading support for the energy and power meters
available on various IBM System X hardware through the BMC. All sensor banks
will be exported as platform devices; this driver can talk to both v1 and v2
interfaces. This driver is completely separate from the older ibmpex driver.
The v1 AEM interface has a simple set of features to monitor energy use.
There is a register that displays an estimate of raw energy consumption
since the last BMC reset, and a power sensor that returns average power
use over a configurable interval.
The v1 AEM interface has a simple set of features to monitor energy use. There
is a register that displays an estimate of raw energy consumption since the
last BMC reset, and a power sensor that returns average power use over a
configurable interval.
The v2 AEM interface is a bit more sophisticated, being able to present
a wider range of energy and power use registers, the power cap as
set by the AEM software, and temperature sensors.
The v2 AEM interface is a bit more sophisticated, being able to present a wider
range of energy and power use registers, the power cap as set by the AEM
software, and temperature sensors.
Special Features
----------------
The "power_cap" value displays the current system power cap, as set by
the Active Energy Manager software. Setting the power cap from the host
is not currently supported.
The "power_cap" value displays the current system power cap, as set by the AEM
software. Setting the power cap from the host is not currently supported.

13
Documentation/hwmon/it87
View File

@ -6,12 +6,14 @@ Supported chips:
Prefix: 'it87'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Publicly available at the ITE website
http://www.ite.com.tw/
http://www.ite.com.tw/product_info/file/pc/IT8705F_V.0.4.1.pdf
* IT8712F
Prefix: 'it8712'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Publicly available at the ITE website
http://www.ite.com.tw/
http://www.ite.com.tw/product_info/file/pc/IT8712F_V0.9.1.pdf
http://www.ite.com.tw/product_info/file/pc/Errata%20V0.1%20for%20IT8712F%20V0.9.1.pdf
http://www.ite.com.tw/product_info/file/pc/IT8712F_V0.9.3.pdf
* IT8716F/IT8726F
Prefix: 'it8716'
Addresses scanned: from Super I/O config space (8 I/O ports)
@ -90,14 +92,13 @@ upper VID bits share their pins with voltage inputs (in5 and in6) so you
can't have both on a given board.
The IT8716F, IT8718F and later IT8712F revisions have support for
2 additional fans. They are supported by the driver for the IT8716F and
IT8718F but not for the IT8712F
2 additional fans. The additional fans are supported by the driver.
The IT8716F and IT8718F, and late IT8712F and IT8705F also have optional
16-bit tachometer counters for fans 1 to 3. This is better (no more fan
clock divider mess) but not compatible with the older chips and
revisions. For now, the driver only uses the 16-bit mode on the
IT8716F and IT8718F.
revisions. The 16-bit tachometer mode is enabled by the driver when one
of the above chips is detected.
The IT8726F is just bit enhanced IT8716F with additional hardware
for AMD power sequencing. Therefore the chip will appear as IT8716F

11
Documentation/hwmon/lm85
View File

@ -96,11 +96,6 @@ initial testing of the ADM1027 it was 1.00 degC steps. Analog Devices has
confirmed this "bug". The ADT7463 is reported to work as described in the
documentation. The current lm85 driver does not show the offset register.
The ADT7463 has a THERM asserted counter. This counter has a 22.76ms
resolution and a range of 5.8 seconds. The driver implements a 32-bit
accumulator of the counter value to extend the range to over a year. The
counter will stay at it's max value until read.
See the vendor datasheets for more information. There is application note
from National (AN-1260) with some additional information about the LM85.
The Analog Devices datasheet is very detailed and describes a procedure for
@ -206,13 +201,15 @@ Configuration choices:
The National LM85's have two vendor specific configuration
features. Tach. mode and Spinup Control. For more details on these,
see the LM85 datasheet or Application Note AN-1260.
see the LM85 datasheet or Application Note AN-1260. These features
are not currently supported by the lm85 driver.
The Analog Devices ADM1027 has several vendor specific enhancements.
The number of pulses-per-rev of the fans can be set, Tach monitoring
can be optimized for PWM operation, and an offset can be applied to
the temperatures to compensate for systemic errors in the
measurements.
measurements. These features are not currently supported by the lm85
driver.
In addition to the ADM1027 features, the ADT7463 also has Tmin control
and THERM asserted counts. Automatic Tmin control acts to adjust the

4
Documentation/hwmon/w83627hf
View File

@ -40,10 +40,6 @@ Module Parameters
(default is 1)
Use 'init=0' to bypass initializing the chip.
Try this if your computer crashes when you load the module.
* reset: int
(default is 0)
The driver used to reset the chip on load, but does no more. Use
'reset=1' to restore the old behavior. Report if you need to do this.
Description
-----------

6
Documentation/hwmon/w83791d
View File

@ -22,6 +22,7 @@ Credits:
Additional contributors:
Sven Anders <anders@anduras.de>
Marc Hulsman <m.hulsman@tudelft.nl>
Module Parameters
-----------------
@ -67,9 +68,8 @@ on until the temperature falls below the Hysteresis value.
Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
triggered if the rotation speed has dropped below a programmable limit. Fan
readings can be divided by a programmable divider (1, 2, 4, 8 for fan 1/2/3
and 1, 2, 4, 8, 16, 32, 64 or 128 for fan 4/5) to give the readings more
range or accuracy.
readings can be divided by a programmable divider (1, 2, 4, 8, 16,
32, 64 or 128 for all fans) to give the readings more range or accuracy.
Voltage sensors (also known as IN sensors) report their values in millivolts.
An alarm is triggered if the voltage has crossed a programmable minimum

281
Documentation/i2c/upgrading-clients Normal file
View File

@ -0,0 +1,281 @@
Upgrading I2C Drivers to the new 2.6 Driver Model
=================================================
Ben Dooks <ben-linux@fluff.org>
Introduction
------------
This guide outlines how to alter existing Linux 2.6 client drivers from
the old to the new new binding methods.
Example old-style driver
------------------------
struct example_state {
struct i2c_client client;
....
};
static struct i2c_driver example_driver;
static unsigned short ignore[] = { I2C_CLIENT_END };
static unsigned short normal_addr[] = { OUR_ADDR, I2C_CLIENT_END };
I2C_CLIENT_INSMOD;
static int example_attach(struct i2c_adapter *adap, int addr, int kind)
{
struct example_state *state;
struct device *dev = &adap->dev; /* to use for dev_ reports */
int ret;
state = kzalloc(sizeof(struct example_state), GFP_KERNEL);
if (state == NULL) {
dev_err(dev, "failed to create our state\n");
return -ENOMEM;
}
example->client.addr = addr;
example->client.flags = 0;
example->client.adapter = adap;
i2c_set_clientdata(&state->i2c_client, state);
strlcpy(client->i2c_client.name, "example", I2C_NAME_SIZE);
ret = i2c_attach_client(&state->i2c_client);
if (ret < 0) {
dev_err(dev, "failed to attach client\n");
kfree(state);
return ret;
}
dev = &state->i2c_client.dev;
/* rest of the initialisation goes here. */
dev_info(dev, "example client created\n");
return 0;
}
static int __devexit example_detach(struct i2c_client *client)
{
struct example_state *state = i2c_get_clientdata(client);
i2c_detach_client(client);
kfree(state);
return 0;
}
static int example_attach_adapter(struct i2c_adapter *adap)
{
return i2c_probe(adap, &addr_data, example_attach);
}
static struct i2c_driver example_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "example",
},
.attach_adapter = example_attach_adapter,
.detach_client = __devexit_p(example_detach),
.suspend = example_suspend,
.resume = example_resume,
};
Updating the client
-------------------
The new style binding model will check against a list of supported
devices and their associated address supplied by the code registering
the busses. This means that the driver .attach_adapter and
.detach_adapter methods can be removed, along with the addr_data,
as follows:
- static struct i2c_driver example_driver;
- static unsigned short ignore[] = { I2C_CLIENT_END };
- static unsigned short normal_addr[] = { OUR_ADDR, I2C_CLIENT_END };
- I2C_CLIENT_INSMOD;
- static int example_attach_adapter(struct i2c_adapter *adap)
- {
- return i2c_probe(adap, &addr_data, example_attach);
- }
static struct i2c_driver example_driver = {
- .attach_adapter = example_attach_adapter,
- .detach_client = __devexit_p(example_detach),
}
Add the probe and remove methods to the i2c_driver, as so:
static struct i2c_driver example_driver = {
+ .probe = example_probe,
+ .remove = __devexit_p(example_remove),
}
Change the example_attach method to accept the new parameters
which include the i2c_client that it will be working with:
- static int example_attach(struct i2c_adapter *adap, int addr, int kind)
+ static int example_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
Change the name of example_attach to example_probe to align it with the
i2c_driver entry names. The rest of the probe routine will now need to be
changed as the i2c_client has already been setup for use.
The necessary client fields have already been setup before
the probe function is called, so the following client setup
can be removed:
- example->client.addr = addr;
- example->client.flags = 0;
- example->client.adapter = adap;
-
- strlcpy(client->i2c_client.name, "example", I2C_NAME_SIZE);
The i2c_set_clientdata is now:
- i2c_set_clientdata(&state->client, state);
+ i2c_set_clientdata(client, state);
The call to i2c_attach_client is no longer needed, if the probe
routine exits successfully, then the driver will be automatically
attached by the core. Change the probe routine as so:
- ret = i2c_attach_client(&state->i2c_client);
- if (ret < 0) {
- dev_err(dev, "failed to attach client\n");
- kfree(state);
- return ret;
- }
Remove the storage of 'struct i2c_client' from the 'struct example_state'
as we are provided with the i2c_client in our example_probe. Instead we
store a pointer to it for when it is needed.
struct example_state {
- struct i2c_client client;
+ struct i2c_client *client;
the new i2c client as so:
- struct device *dev = &adap->dev; /* to use for dev_ reports */
+ struct device *dev = &i2c_client->dev; /* to use for dev_ reports */
And remove the change after our client is attached, as the driver no
longer needs to register a new client structure with the core:
- dev = &state->i2c_client.dev;
In the probe routine, ensure that the new state has the client stored
in it:
static int example_probe(struct i2c_client *i2c_client,
const struct i2c_device_id *id)
{
struct example_state *state;
struct device *dev = &i2c_client->dev;
int ret;
state = kzalloc(sizeof(struct example_state), GFP_KERNEL);
if (state == NULL) {
dev_err(dev, "failed to create our state\n");
return -ENOMEM;
}
+ state->client = i2c_client;
Update the detach method, by changing the name to _remove and
to delete the i2c_detach_client call. It is possible that you
can also remove the ret variable as it is not not needed for
any of the core functions.
- static int __devexit example_detach(struct i2c_client *client)
+ static int __devexit example_remove(struct i2c_client *client)
{
struct example_state *state = i2c_get_clientdata(client);
- i2c_detach_client(client);
And finally ensure that we have the correct ID table for the i2c-core
and other utilities:
+ struct i2c_device_id example_idtable[] = {
+ { "example", 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, example_idtable);
static struct i2c_driver example_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "example",
},
+ .id_table = example_ids,
Our driver should now look like this:
struct example_state {
struct i2c_client *client;
....
};
static int example_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct example_state *state;
struct device *dev = &client->dev;
state = kzalloc(sizeof(struct example_state), GFP_KERNEL);
if (state == NULL) {
dev_err(dev, "failed to create our state\n");
return -ENOMEM;
}
state->client = client;
i2c_set_clientdata(client, state);
/* rest of the initialisation goes here. */
dev_info(dev, "example client created\n");
return 0;
}
static int __devexit example_remove(struct i2c_client *client)
{
struct example_state *state = i2c_get_clientdata(client);
kfree(state);
return 0;
}
static struct i2c_device_id example_idtable[] = {
{ "example", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, example_idtable);
static struct i2c_driver example_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "example",
},
.id_table = example_idtable,
.probe = example_probe,
.remove = __devexit_p(example_remove),
.suspend = example_suspend,
.resume = example_resume,
};

8
Documentation/ia64/Makefile Normal file
View File

@ -0,0 +1,8 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := aliasing-test
# Tell kbuild to always build the programs
always := $(hostprogs-y)

8
Documentation/ia64/kvm.txt
View File

@ -50,9 +50,9 @@ Note: For step 2, please make sure that host page size == TARGET_PAGE_SIZE of qe
/usr/local/bin/qemu-system-ia64 -smp xx -m 512 -hda $your_image
(xx is the number of virtual processors for the guest, now the maximum value is 4)
5. Known possibile issue on some platforms with old Firmware.
5. Known possible issue on some platforms with old Firmware.
If meet strange host crashe issues, try to solve it through either of the following ways:
In the event of strange host crash issues, try to solve it through either of the following ways:
(1): Upgrade your Firmware to the latest one.
@ -65,8 +65,8 @@ index 0b53344..f02b0f7 100644
mov ar.pfs = loc1
mov rp = loc0
;;
- srlz.d // seralize restoration of psr.l
+ srlz.i // seralize restoration of psr.l
- srlz.d // serialize restoration of psr.l
+ srlz.i // serialize restoration of psr.l
+ ;;
br.ret.sptk.many b0
END(ia64_pal_call_static)

2
Documentation/input/cs461x.txt
View File

@ -31,7 +31,7 @@ The driver works with ALSA drivers simultaneously. For example, the xracer
uses joystick as input device and PCM device as sound output in one time.
There are no sound or input collisions detected. The source code have
comments about them; but I've found the joystick can be initialized
separately of ALSA modules. So, you canm use only one joystick driver
separately of ALSA modules. So, you can use only one joystick driver
without ALSA drivers. The ALSA drivers are not needed to compile or
run this driver.

1
Documentation/ioctl-number.txt
View File

@ -105,7 +105,6 @@ Code Seq# Include File Comments
'T' all linux/soundcard.h conflict!
'T' all asm-i386/ioctls.h conflict!
'U' 00-EF linux/drivers/usb/usb.h
'U' F0-FF drivers/usb/auerswald.c
'V' all linux/vt.h
'W' 00-1F linux/watchdog.h conflict!
'W' 00-1F linux/wanrouter.h conflict!

4
Documentation/ioctl/ioctl-decoding.txt
View File

@ -1,6 +1,6 @@
To decode a hex IOCTL code:
Most architecures use this generic format, but check
Most architectures use this generic format, but check
include/ARCH/ioctl.h for specifics, e.g. powerpc
uses 3 bits to encode read/write and 13 bits for size.
@ -18,7 +18,7 @@ uses 3 bits to encode read/write and 13 bits for size.
7-0 function #
So for example 0x82187201 is a read with arg length of 0x218,
So for example 0x82187201 is a read with arg length of 0x218,
character 'r' function 1. Grepping the source reveals this is:
#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct dirent [2])

2
Documentation/iostats.txt
View File

@ -143,7 +143,7 @@ disk and partition statistics are consistent again. Since we still don't
keep record of the partition-relative address, an operation is attributed to
the partition which contains the first sector of the request after the
eventual merges. As requests can be merged across partition, this could lead
to some (probably insignificant) innacuracy.
to some (probably insignificant) inaccuracy.
Additional notes
----------------

6
Documentation/isdn/README.mISDN Normal file
View File

@ -0,0 +1,6 @@
mISDN is a new modular ISDN driver, in the long term it should replace
the old I4L driver architecture for passiv ISDN cards.
It was designed to allow a broad range of applications and interfaces
but only have the basic function in kernel, the interface to the user
space is based on sockets with a own address family AF_ISDN.

20
Documentation/kdump/kdump.txt
View File

@ -65,26 +65,26 @@ Install kexec-tools
2) Download the kexec-tools user-space package from the following URL:
http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools-testing.tar.gz
http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools.tar.gz
This is a symlink to the latest version, which at the time of writing is
20061214, the only release of kexec-tools-testing so far. As other versions
are released, the older ones will remain available at
http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/
This is a symlink to the latest version.
Note: Latest kexec-tools-testing git tree is available at
The latest kexec-tools git tree is available at:
git://git.kernel.org/pub/scm/linux/kernel/git/horms/kexec-tools-testing.git
git://git.kernel.org/pub/scm/linux/kernel/git/horms/kexec-tools.git
or
http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools-testing.git;a=summary
http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools.git
More information about kexec-tools can be found at
http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/README.html
3) Unpack the tarball with the tar command, as follows:
tar xvpzf kexec-tools-testing.tar.gz
tar xvpzf kexec-tools.tar.gz
4) Change to the kexec-tools directory, as follows:
cd kexec-tools-testing-VERSION
cd kexec-tools-VERSION
5) Configure the package, as follows:

2
Documentation/keys.txt
View File

@ -864,7 +864,7 @@ payload contents" for more information.
request_key_with_auxdata() respectively.
These two functions return with the key potentially still under
construction. To wait for contruction completion, the following should be
construction. To wait for construction completion, the following should be
called:
int wait_for_key_construction(struct key *key, bool intr);

2
Documentation/leds-class.txt
View File

@ -59,7 +59,7 @@ Hardware accelerated blink of LEDs
Some LEDs can be programmed to blink without any CPU interaction. To
support this feature, a LED driver can optionally implement the
blink_set() function (see <linux/leds.h>). If implemeted, triggers can
blink_set() function (see <linux/leds.h>). If implemented, triggers can
attempt to use it before falling back to software timers. The blink_set()
function should return 0 if the blink setting is supported, or -EINVAL
otherwise, which means that LED blinking will be handled by software.

510
Documentation/lguest/lguest.c
View File

@ -36,11 +36,13 @@
#include <sched.h>
#include <limits.h>
#include <stddef.h>
#include <signal.h>
#include "linux/lguest_launcher.h"
#include "linux/virtio_config.h"
#include "linux/virtio_net.h"
#include "linux/virtio_blk.h"
#include "linux/virtio_console.h"
#include "linux/virtio_rng.h"
#include "linux/virtio_ring.h"
#include "asm-x86/bootparam.h"
/*L:110 We can ignore the 39 include files we need for this program, but I do
@ -64,8 +66,8 @@ typedef uint8_t u8;
#endif
/* We can have up to 256 pages for devices. */
#define DEVICE_PAGES 256
/* This will occupy 2 pages: it must be a power of 2. */
#define VIRTQUEUE_NUM 128
/* This will occupy 3 pages: it must be a power of 2. */
#define VIRTQUEUE_NUM 256
/*L:120 verbose is both a global flag and a macro. The C preprocessor allows
* this, and although I wouldn't recommend it, it works quite nicely here. */
@ -74,12 +76,19 @@ static bool verbose;
do { if (verbose) printf(args); } while(0)
/*:*/
/* The pipe to send commands to the waker process */
static int waker_fd;
/* File descriptors for the Waker. */
struct {
int pipe[2];
int lguest_fd;
} waker_fds;
/* The pointer to the start of guest memory. */
static void *guest_base;
/* The maximum guest physical address allowed, and maximum possible. */
static unsigned long guest_limit, guest_max;
/* The pipe for signal hander to write to. */
static int timeoutpipe[2];
static unsigned int timeout_usec = 500;
/* a per-cpu variable indicating whose vcpu is currently running */
static unsigned int __thread cpu_id;
@ -155,11 +164,14 @@ struct virtqueue
/* Last available index we saw. */
u16 last_avail_idx;
/* The routine to call when the Guest pings us. */
void (*handle_output)(int fd, struct virtqueue *me);
/* The routine to call when the Guest pings us, or timeout. */
void (*handle_output)(int fd, struct virtqueue *me, bool timeout);
/* Outstanding buffers */
unsigned int inflight;
/* Is this blocked awaiting a timer? */
bool blocked;
};
/* Remember the arguments to the program so we can "reboot" */
@ -190,6 +202,9 @@ static void *_convert(struct iovec *iov, size_t size, size_t align,
return iov->iov_base;
}
/* Wrapper for the last available index. Makes it easier to change. */
#define lg_last_avail(vq) ((vq)->last_avail_idx)
/* The virtio configuration space is defined to be little-endian. x86 is
* little-endian too, but it's nice to be explicit so we have these helpers. */
#define cpu_to_le16(v16) (v16)
@ -199,6 +214,33 @@ static void *_convert(struct iovec *iov, size_t size, size_t align,
#define le32_to_cpu(v32) (v32)
#define le64_to_cpu(v64) (v64)
/* Is this iovec empty? */
static bool iov_empty(const struct iovec iov[], unsigned int num_iov)
{
unsigned int i;
for (i = 0; i < num_iov; i++)
if (iov[i].iov_len)
return false;
return true;
}
/* Take len bytes from the front of this iovec. */
static void iov_consume(struct iovec iov[], unsigned num_iov, unsigned len)
{
unsigned int i;
for (i = 0; i < num_iov; i++) {
unsigned int used;
used = iov[i].iov_len < len ? iov[i].iov_len : len;
iov[i].iov_base += used;
iov[i].iov_len -= used;
len -= used;
}
assert(len == 0);
}
/* The device virtqueue descriptors are followed by feature bitmasks. */
static u8 *get_feature_bits(struct device *dev)
{
@ -254,6 +296,7 @@ static void *map_zeroed_pages(unsigned int num)
PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, fd, 0);
if (addr == MAP_FAILED)
err(1, "Mmaping %u pages of /dev/zero", num);
close(fd);
return addr;
}
@ -540,69 +583,64 @@ static void add_device_fd(int fd)
* watch, but handing a file descriptor mask through to the kernel is fairly
* icky.
*
* Instead, we fork off a process which watches the file descriptors and writes
* Instead, we clone off a thread which watches the file descriptors and writes
* the LHREQ_BREAK command to the /dev/lguest file descriptor to tell the Host
* stop running the Guest. This causes the Launcher to return from the
* /dev/lguest read with -EAGAIN, where it will write to /dev/lguest to reset
* the LHREQ_BREAK and wake us up again.
*
* This, of course, is merely a different *kind* of icky.
*
* Given my well-known antipathy to threads, I'd prefer to use processes. But
* it's easier to share Guest memory with threads, and trivial to share the
* devices.infds as the Launcher changes it.
*/
static void wake_parent(int pipefd, int lguest_fd)
static int waker(void *unused)
{
/* Add the pipe from the Launcher to the fdset in the device_list, so
* we watch it, too. */
add_device_fd(pipefd);
/* Close the write end of the pipe: only the Launcher has it open. */
close(waker_fds.pipe[1]);
for (;;) {
fd_set rfds = devices.infds;
unsigned long args[] = { LHREQ_BREAK, 1 };
unsigned int maxfd = devices.max_infd;
/* We also listen to the pipe from the Launcher. */
FD_SET(waker_fds.pipe[0], &rfds);
if (waker_fds.pipe[0] > maxfd)
maxfd = waker_fds.pipe[0];
/* Wait until input is ready from one of the devices. */
select(devices.max_infd+1, &rfds, NULL, NULL, NULL);
/* Is it a message from the Launcher? */
if (FD_ISSET(pipefd, &rfds)) {
int fd;
/* If read() returns 0, it means the Launcher has
* exited. We silently follow. */
if (read(pipefd, &fd, sizeof(fd)) == 0)
exit(0);
/* Otherwise it's telling us to change what file
* descriptors we're to listen to. Positive means
* listen to a new one, negative means stop
* listening. */
if (fd >= 0)
FD_SET(fd, &devices.infds);
else
FD_CLR(-fd - 1, &devices.infds);
} else /* Send LHREQ_BREAK command. */
pwrite(lguest_fd, args, sizeof(args), cpu_id);
select(maxfd+1, &rfds, NULL, NULL, NULL);
/* Message from Launcher? */
if (FD_ISSET(waker_fds.pipe[0], &rfds)) {
char c;
/* If this fails, then assume Launcher has exited.
* Don't do anything on exit: we're just a thread! */
if (read(waker_fds.pipe[0], &c, 1) != 1)
_exit(0);
continue;
}
/* Send LHREQ_BREAK command to snap the Launcher out of it. */
pwrite(waker_fds.lguest_fd, args, sizeof(args), cpu_id);
}
return 0;
}
/* This routine just sets up a pipe to the Waker process. */
static int setup_waker(int lguest_fd)
static void setup_waker(int lguest_fd)
{
int pipefd[2], child;
/* This pipe is closed when Launcher dies, telling Waker. */
if (pipe(waker_fds.pipe) != 0)
err(1, "Creating pipe for Waker");
/* We create a pipe to talk to the Waker, and also so it knows when the
* Launcher dies (and closes pipe). */
pipe(pipefd);
child = fork();
if (child == -1)
err(1, "forking");
/* Waker also needs to know the lguest fd */
waker_fds.lguest_fd = lguest_fd;
if (child == 0) {
/* We are the Waker: close the "writing" end of our copy of the
* pipe and start waiting for input. */
close(pipefd[1]);
wake_parent(pipefd[0], lguest_fd);
}
/* Close the reading end of our copy of the pipe. */
close(pipefd[0]);
/* Here is the fd used to talk to the waker. */
return pipefd[1];
if (clone(waker, malloc(4096) + 4096, CLONE_VM | SIGCHLD, NULL) == -1)
err(1, "Creating Waker");
}
/*
@ -661,19 +699,22 @@ static unsigned get_vq_desc(struct virtqueue *vq,
unsigned int *out_num, unsigned int *in_num)
{
unsigned int i, head;
u16 last_avail;
/* Check it isn't doing very strange things with descriptor numbers. */
if ((u16)(vq->vring.avail->idx - vq->last_avail_idx) > vq->vring.num)
last_avail = lg_last_avail(vq);
if ((u16)(vq->vring.avail->idx - last_avail) > vq->vring.num)
errx(1, "Guest moved used index from %u to %u",
vq->last_avail_idx, vq->vring.avail->idx);
last_avail, vq->vring.avail->idx);
/* If there's nothing new since last we looked, return invalid. */
if (vq->vring.avail->idx == vq->last_avail_idx)
if (vq->vring.avail->idx == last_avail)
return vq->vring.num;
/* Grab the next descriptor number they're advertising, and increment
* the index we've seen. */
head = vq->vring.avail->ring[vq->last_avail_idx++ % vq->vring.num];
head = vq->vring.avail->ring[last_avail % vq->vring.num];
lg_last_avail(vq)++;
/* If their number is silly, that's a fatal mistake. */
if (head >= vq->vring.num)
@ -821,8 +862,8 @@ static bool handle_console_input(int fd, struct device *dev)
unsigned long args[] = { LHREQ_BREAK, 0 };
/* Close the fd so Waker will know it has to
* exit. */
close(waker_fd);
/* Just in case waker is blocked in BREAK, send
close(waker_fds.pipe[1]);
/* Just in case Waker is blocked in BREAK, send
* unbreak now. */
write(fd, args, sizeof(args));
exit(2);
@ -839,7 +880,7 @@ static bool handle_console_input(int fd, struct device *dev)
/* Handling output for console is simple: we just get all the output buffers
* and write them to stdout. */
static void handle_console_output(int fd, struct virtqueue *vq)
static void handle_console_output(int fd, struct virtqueue *vq, bool timeout)
{
unsigned int head, out, in;
int len;
@ -854,6 +895,21 @@ static void handle_console_output(int fd, struct virtqueue *vq)
}
}
static void block_vq(struct virtqueue *vq)
{
struct itimerval itm;
vq->vring.used->flags |= VRING_USED_F_NO_NOTIFY;
vq->blocked = true;
itm.it_interval.tv_sec = 0;
itm.it_interval.tv_usec = 0;
itm.it_value.tv_sec = 0;
itm.it_value.tv_usec = timeout_usec;
setitimer(ITIMER_REAL, &itm, NULL);
}
/*
* The Network
*
@ -861,22 +917,34 @@ static void handle_console_output(int fd, struct virtqueue *vq)
* and write them (ignoring the first element) to this device's file descriptor
* (/dev/net/tun).
*/
static void handle_net_output(int fd, struct virtqueue *vq)
static void handle_net_output(int fd, struct virtqueue *vq, bool timeout)
{
unsigned int head, out, in;
unsigned int head, out, in, num = 0;
int len;
struct iovec iov[vq->vring.num];
static int last_timeout_num;
/* Keep getting output buffers from the Guest until we run out. */
while ((head = get_vq_desc(vq, iov, &out, &in)) != vq->vring.num) {
if (in)
errx(1, "Input buffers in output queue?");
/* Check header, but otherwise ignore it (we told the Guest we
* supported no features, so it shouldn't have anything
* interesting). */
(void)convert(&iov[0], struct virtio_net_hdr);
len = writev(vq->dev->fd, iov+1, out-1);
len = writev(vq->dev->fd, iov, out);
if (len < 0)
err(1, "Writing network packet to tun");
add_used_and_trigger(fd, vq, head, len);
num++;
}
/* Block further kicks and set up a timer if we saw anything. */
if (!timeout && num)
block_vq(vq);
if (timeout) {
if (num < last_timeout_num)
timeout_usec += 10;
else if (timeout_usec > 1)
timeout_usec--;
last_timeout_num = num;
}
}
@ -887,7 +955,6 @@ static bool handle_tun_input(int fd, struct device *dev)
unsigned int head, in_num, out_num;
int len;
struct iovec iov[dev->vq->vring.num];
struct virtio_net_hdr *hdr;
/* First we need a network buffer from the Guests's recv virtqueue. */
head = get_vq_desc(dev->vq, iov, &out_num, &in_num);
@ -896,25 +963,23 @@ static bool handle_tun_input(int fd, struct device *dev)
* early, the Guest won't be ready yet. Wait until the device
* status says it's ready. */
/* FIXME: Actually want DRIVER_ACTIVE here. */
if (dev->desc->status & VIRTIO_CONFIG_S_DRIVER_OK)
warn("network: no dma buffer!");
/* Now tell it we want to know if new things appear. */
dev->vq->vring.used->flags &= ~VRING_USED_F_NO_NOTIFY;
wmb();
/* We'll turn this back on if input buffers are registered. */
return false;
} else if (out_num)
errx(1, "Output buffers in network recv queue?");
/* First element is the header: we set it to 0 (no features). */
hdr = convert(&iov[0], struct virtio_net_hdr);
hdr->flags = 0;
hdr->gso_type = VIRTIO_NET_HDR_GSO_NONE;
/* Read the packet from the device directly into the Guest's buffer. */
len = readv(dev->fd, iov+1, in_num-1);
len = readv(dev->fd, iov, in_num);
if (len <= 0)
err(1, "reading network");
/* Tell the Guest about the new packet. */
add_used_and_trigger(fd, dev->vq, head, sizeof(*hdr) + len);
add_used_and_trigger(fd, dev->vq, head, len);
verbose("tun input packet len %i [%02x %02x] (%s)\n", len,
((u8 *)iov[1].iov_base)[0], ((u8 *)iov[1].iov_base)[1],
@ -927,11 +992,18 @@ static bool handle_tun_input(int fd, struct device *dev)
/*L:215 This is the callback attached to the network and console input
* virtqueues: it ensures we try again, in case we stopped console or net
* delivery because Guest didn't have any buffers. */
static void enable_fd(int fd, struct virtqueue *vq)
static void enable_fd(int fd, struct virtqueue *vq, bool timeout)
{
add_device_fd(vq->dev->fd);
/* Tell waker to listen to it again */
write(waker_fd, &vq->dev->fd, sizeof(vq->dev->fd));
/* Snap the Waker out of its select loop. */
write(waker_fds.pipe[1], "", 1);
}
static void net_enable_fd(int fd, struct virtqueue *vq, bool timeout)
{
/* We don't need to know again when Guest refills receive buffer. */
vq->vring.used->flags |= VRING_USED_F_NO_NOTIFY;
enable_fd(fd, vq, timeout);
}
/* When the Guest tells us they updated the status field, we handle it. */
@ -951,7 +1023,7 @@ static void update_device_status(struct device *dev)
for (vq = dev->vq; vq; vq = vq->next) {
memset(vq->vring.desc, 0,
vring_size(vq->config.num, getpagesize()));
vq->last_avail_idx = 0;
lg_last_avail(vq) = 0;
}
} else if (dev->desc->status & VIRTIO_CONFIG_S_FAILED) {
warnx("Device %s configuration FAILED", dev->name);
@ -960,10 +1032,10 @@ static void update_device_status(struct device *dev)
verbose("Device %s OK: offered", dev->name);
for (i = 0; i < dev->desc->feature_len; i++)
verbose(" %08x", get_feature_bits(dev)[i]);
verbose(" %02x", get_feature_bits(dev)[i]);
verbose(", accepted");
for (i = 0; i < dev->desc->feature_len; i++)
verbose(" %08x", get_feature_bits(dev)
verbose(" %02x", get_feature_bits(dev)
[dev->desc->feature_len+i]);
if (dev->ready)
@ -1000,7 +1072,7 @@ static void handle_output(int fd, unsigned long addr)
if (strcmp(vq->dev->name, "console") != 0)
verbose("Output to %s\n", vq->dev->name);
if (vq->handle_output)
vq->handle_output(fd, vq);
vq->handle_output(fd, vq, false);
return;
}
}
@ -1014,6 +1086,29 @@ static void handle_output(int fd, unsigned long addr)
strnlen(from_guest_phys(addr), guest_limit - addr));
}
static void handle_timeout(int fd)
{
char buf[32];
struct device *i;
struct virtqueue *vq;
/* Clear the pipe */
read(timeoutpipe[0], buf, sizeof(buf));
/* Check each device and virtqueue: flush blocked ones. */
for (i = devices.dev; i; i = i->next) {
for (vq = i->vq; vq; vq = vq->next) {
if (!vq->blocked)
continue;
vq->vring.used->flags &= ~VRING_USED_F_NO_NOTIFY;
vq->blocked = false;
if (vq->handle_output)
vq->handle_output(fd, vq, true);
}
}
}
/* This is called when the Waker wakes us up: check for incoming file
* descriptors. */
static void handle_input(int fd)
@ -1024,16 +1119,20 @@ static void handle_input(int fd)
for (;;) {
struct device *i;
fd_set fds = devices.infds;
int num;
num = select(devices.max_infd+1, &fds, NULL, NULL, &poll);
/* Could get interrupted */
if (num < 0)
continue;
/* If nothing is ready, we're done. */
if (select(devices.max_infd+1, &fds, NULL, NULL, &poll) == 0)
if (num == 0)
break;
/* Otherwise, call the device(s) which have readable file
* descriptors and a method of handling them. */
for (i = devices.dev; i; i = i->next) {
if (i->handle_input && FD_ISSET(i->fd, &fds)) {
int dev_fd;
if (i->handle_input(fd, i))
continue;
@ -1043,13 +1142,12 @@ static void handle_input(int fd)
* buffers to deliver into. Console also uses
* it when it discovers that stdin is closed. */
FD_CLR(i->fd, &devices.infds);
/* Tell waker to ignore it too, by sending a
* negative fd number (-1, since 0 is a valid
* FD number). */
dev_fd = -i->fd - 1;
write(waker_fd, &dev_fd, sizeof(dev_fd));
}
}
/* Is this the timeout fd? */
if (FD_ISSET(timeoutpipe[0], &fds))
handle_timeout(fd);
}
}
@ -1098,7 +1196,7 @@ static struct lguest_device_desc *new_dev_desc(u16 type)
/* Each device descriptor is followed by the description of its virtqueues. We
* specify how many descriptors the virtqueue is to have. */
static void add_virtqueue(struct device *dev, unsigned int num_descs,
void (*handle_output)(int fd, struct virtqueue *me))
void (*handle_output)(int, struct virtqueue *, bool))
{
unsigned int pages;
struct virtqueue **i, *vq = malloc(sizeof(*vq));
@ -1114,6 +1212,7 @@ static void add_virtqueue(struct device *dev, unsigned int num_descs,
vq->last_avail_idx = 0;
vq->dev = dev;
vq->inflight = 0;
vq->blocked = false;
/* Initialize the configuration. */
vq->config.num = num_descs;
@ -1246,6 +1345,24 @@ static void setup_console(void)
}
/*:*/
static void timeout_alarm(int sig)
{
write(timeoutpipe[1], "", 1);
}
static void setup_timeout(void)
{
if (pipe(timeoutpipe) != 0)
err(1, "Creating timeout pipe");
if (fcntl(timeoutpipe[1], F_SETFL,
fcntl(timeoutpipe[1], F_GETFL) | O_NONBLOCK) != 0)
err(1, "Making timeout pipe nonblocking");
add_device_fd(timeoutpipe[0]);
signal(SIGALRM, timeout_alarm);
}
/*M:010 Inter-guest networking is an interesting area. Simplest is to have a
* --sharenet=<name> option which opens or creates a named pipe. This can be
* used to send packets to another guest in a 1:1 manner.
@ -1264,10 +1381,25 @@ static void setup_console(void)
static u32 str2ip(const char *ipaddr)
{
unsigned int byte[4];
unsigned int b[4];
sscanf(ipaddr, "%u.%u.%u.%u", &byte[0], &byte[1], &byte[2], &byte[3]);
return (byte[0] << 24) | (byte[1] << 16) | (byte[2] << 8) | byte[3];
if (sscanf(ipaddr, "%u.%u.%u.%u", &b[0], &b[1], &b[2], &b[3]) != 4)
errx(1, "Failed to parse IP address '%s'", ipaddr);
return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3];
}
static void str2mac(const char *macaddr, unsigned char mac[6])
{
unsigned int m[6];
if (sscanf(macaddr, "%02x:%02x:%02x:%02x:%02x:%02x",
&m[0], &m[1], &m[2], &m[3], &m[4], &m[5]) != 6)
errx(1, "Failed to parse mac address '%s'", macaddr);
mac[0] = m[0];
mac[1] = m[1];
mac[2] = m[2];
mac[3] = m[3];
mac[4] = m[4];
mac[5] = m[5];
}
/* This code is "adapted" from libbridge: it attaches the Host end of the
@ -1288,6 +1420,7 @@ static void add_to_bridge(int fd, const char *if_name, const char *br_name)
errx(1, "interface %s does not exist!", if_name);
strncpy(ifr.ifr_name, br_name, IFNAMSIZ);
ifr.ifr_name[IFNAMSIZ-1] = '\0';
ifr.ifr_ifindex = ifidx;
if (ioctl(fd, SIOCBRADDIF, &ifr) < 0)
err(1, "can't add %s to bridge %s", if_name, br_name);
@ -1296,64 +1429,75 @@ static void add_to_bridge(int fd, const char *if_name, const char *br_name)
/* This sets up the Host end of the network device with an IP address, brings
* it up so packets will flow, the copies the MAC address into the hwaddr
* pointer. */
static void configure_device(int fd, const char *devname, u32 ipaddr,
unsigned char hwaddr[6])
static void configure_device(int fd, const char *tapif, u32 ipaddr)
{
struct ifreq ifr;
struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr;
/* Don't read these incantations. Just cut & paste them like I did! */
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, devname);
strcpy(ifr.ifr_name, tapif);
/* Don't read these incantations. Just cut & paste them like I did! */
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = htonl(ipaddr);
if (ioctl(fd, SIOCSIFADDR, &ifr) != 0)
err(1, "Setting %s interface address", devname);
err(1, "Setting %s interface address", tapif);
ifr.ifr_flags = IFF_UP;
if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0)
err(1, "Bringing interface %s up", devname);
/* SIOC stands for Socket I/O Control. G means Get (vs S for Set
* above). IF means Interface, and HWADDR is hardware address.
* Simple! */
if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0)
err(1, "getting hw address for %s", devname);
memcpy(hwaddr, ifr.ifr_hwaddr.sa_data, 6);
err(1, "Bringing interface %s up", tapif);
}
/*L:195 Our network is a Host<->Guest network. This can either use bridging or
* routing, but the principle is the same: it uses the "tun" device to inject
* packets into the Host as if they came in from a normal network card. We
* just shunt packets between the Guest and the tun device. */
static void setup_tun_net(const char *arg)
static int get_tun_device(char tapif[IFNAMSIZ])
{
struct device *dev;
struct ifreq ifr;
int netfd, ipfd;
u32 ip;
const char *br_name = NULL;
struct virtio_net_config conf;
int netfd;
/* Start with this zeroed. Messy but sure. */
memset(&ifr, 0, sizeof(ifr));
/* We open the /dev/net/tun device and tell it we want a tap device. A
* tap device is like a tun device, only somehow different. To tell
* the truth, I completely blundered my way through this code, but it
* works now! */
netfd = open_or_die("/dev/net/tun", O_RDWR);
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR;
strcpy(ifr.ifr_name, "tap%d");
if (ioctl(netfd, TUNSETIFF, &ifr) != 0)
err(1, "configuring /dev/net/tun");
if (ioctl(netfd, TUNSETOFFLOAD,
TUN_F_CSUM|TUN_F_TSO4|TUN_F_TSO6|TUN_F_TSO_ECN) != 0)
err(1, "Could not set features for tun device");
/* We don't need checksums calculated for packets coming in this
* device: trust us! */
ioctl(netfd, TUNSETNOCSUM, 1);
memcpy(tapif, ifr.ifr_name, IFNAMSIZ);
return netfd;
}
/*L:195 Our network is a Host<->Guest network. This can either use bridging or
* routing, but the principle is the same: it uses the "tun" device to inject
* packets into the Host as if they came in from a normal network card. We
* just shunt packets between the Guest and the tun device. */
static void setup_tun_net(char *arg)
{
struct device *dev;
int netfd, ipfd;
u32 ip = INADDR_ANY;
bool bridging = false;
char tapif[IFNAMSIZ], *p;
struct virtio_net_config conf;
netfd = get_tun_device(tapif);
/* First we create a new network device. */
dev = new_device("net", VIRTIO_ID_NET, netfd, handle_tun_input);
/* Network devices need a receive and a send queue, just like
* console. */
add_virtqueue(dev, VIRTQUEUE_NUM, enable_fd);
add_virtqueue(dev, VIRTQUEUE_NUM, net_enable_fd);
add_virtqueue(dev, VIRTQUEUE_NUM, handle_net_output);
/* We need a socket to perform the magic network ioctls to bring up the
@ -1364,28 +1508,50 @@ static void setup_tun_net(const char *arg)
/* If the command line was --tunnet=bridge:<name> do bridging. */
if (!strncmp(BRIDGE_PFX, arg, strlen(BRIDGE_PFX))) {
ip = INADDR_ANY;
br_name = arg + strlen(BRIDGE_PFX);
add_to_bridge(ipfd, ifr.ifr_name, br_name);
} else /* It is an IP address to set up the device with */
arg += strlen(BRIDGE_PFX);
bridging = true;
}
/* A mac address may follow the bridge name or IP address */
p = strchr(arg, ':');
if (p) {
str2mac(p+1, conf.mac);
add_feature(dev, VIRTIO_NET_F_MAC);
*p = '\0';
}
/* arg is now either an IP address or a bridge name */
if (bridging)
add_to_bridge(ipfd, tapif, arg);
else
ip = str2ip(arg);
/* Set up the tun device, and get the mac address for the interface. */
configure_device(ipfd, ifr.ifr_name, ip, conf.mac);
/* Set up the tun device. */
configure_device(ipfd, tapif, ip);
/* Tell Guest what MAC address to use. */
add_feature(dev, VIRTIO_NET_F_MAC);
add_feature(dev, VIRTIO_F_NOTIFY_ON_EMPTY);
/* Expect Guest to handle everything except UFO */
add_feature(dev, VIRTIO_NET_F_CSUM);
add_feature(dev, VIRTIO_NET_F_GUEST_CSUM);
add_feature(dev, VIRTIO_NET_F_GUEST_TSO4);
add_feature(dev, VIRTIO_NET_F_GUEST_TSO6);
add_feature(dev, VIRTIO_NET_F_GUEST_ECN);
add_feature(dev, VIRTIO_NET_F_HOST_TSO4);
add_feature(dev, VIRTIO_NET_F_HOST_TSO6);
add_feature(dev, VIRTIO_NET_F_HOST_ECN);
set_config(dev, sizeof(conf), &conf);
/* We don't need the socket any more; setup is done. */
close(ipfd);
verbose("device %u: tun net %u.%u.%u.%u\n",
devices.device_num++,
(u8)(ip>>24),(u8)(ip>>16),(u8)(ip>>8),(u8)ip);
if (br_name)
verbose("attached to bridge: %s\n", br_name);
devices.device_num++;
if (bridging)
verbose("device %u: tun %s attached to bridge: %s\n",
devices.device_num, tapif, arg);
else
verbose("device %u: tun %s: %s\n",
devices.device_num, tapif, arg);
}
/* Our block (disk) device should be really simple: the Guest asks for a block
@ -1550,7 +1716,7 @@ static bool handle_io_finish(int fd, struct device *dev)
}
/* When the Guest submits some I/O, we just need to wake the I/O thread. */
static void handle_virtblk_output(int fd, struct virtqueue *vq)
static void handle_virtblk_output(int fd, struct virtqueue *vq, bool timeout)
{
struct vblk_info *vblk = vq->dev->priv;
char c = 0;
@ -1621,6 +1787,64 @@ static void setup_block_file(const char *filename)
verbose("device %u: virtblock %llu sectors\n",
devices.device_num, le64_to_cpu(conf.capacity));
}
/* Our random number generator device reads from /dev/random into the Guest's
* input buffers. The usual case is that the Guest doesn't want random numbers
* and so has no buffers although /dev/random is still readable, whereas
* console is the reverse.
*
* The same logic applies, however. */
static bool handle_rng_input(int fd, struct device *dev)
{
int len;
unsigned int head, in_num, out_num, totlen = 0;
struct iovec iov[dev->vq->vring.num];
/* First we need a buffer from the Guests's virtqueue. */
head = get_vq_desc(dev->vq, iov, &out_num, &in_num);
/* If they're not ready for input, stop listening to this file
* descriptor. We'll start again once they add an input buffer. */
if (head == dev->vq->vring.num)
return false;
if (out_num)
errx(1, "Output buffers in rng?");
/* This is why we convert to iovecs: the readv() call uses them, and so
* it reads straight into the Guest's buffer. We loop to make sure we
* fill it. */
while (!iov_empty(iov, in_num)) {
len = readv(dev->fd, iov, in_num);
if (len <= 0)
err(1, "Read from /dev/random gave %i", len);
iov_consume(iov, in_num, len);
totlen += len;
}
/* Tell the Guest about the new input. */
add_used_and_trigger(fd, dev->vq, head, totlen);
/* Everything went OK! */
return true;
}
/* And this creates a "hardware" random number device for the Guest. */
static void setup_rng(void)
{
struct device *dev;
int fd;
fd = open_or_die("/dev/random", O_RDONLY);
/* The device responds to return from I/O thread. */
dev = new_device("rng", VIRTIO_ID_RNG, fd, handle_rng_input);
/* The device has one virtqueue, where the Guest places inbufs. */
add_virtqueue(dev, VIRTQUEUE_NUM, enable_fd);
verbose("device %u: rng\n", devices.device_num++);
}
/* That's the end of device setup. */
/*L:230 Reboot is pretty easy: clean up and exec() the Launcher afresh. */
@ -1628,11 +1852,12 @@ static void __attribute__((noreturn)) restart_guest(void)
{
unsigned int i;
/* Closing pipes causes the Waker thread and io_threads to die, and
* closing /dev/lguest cleans up the Guest. Since we don't track all
* open fds, we simply close everything beyond stderr. */
/* Since we don't track all open fds, we simply close everything beyond
* stderr. */
for (i = 3; i < FD_SETSIZE; i++)
close(i);
/* The exec automatically gets rid of the I/O and Waker threads. */
execv(main_args[0], main_args);
err(1, "Could not exec %s", main_args[0]);
}
@ -1663,7 +1888,7 @@ static void __attribute__((noreturn)) run_guest(int lguest_fd)
/* ERESTART means that we need to reboot the guest */
} else if (errno == ERESTART) {
restart_guest();
/* EAGAIN means the Waker wanted us to look at some input.
/* EAGAIN means a signal (timeout).
* Anything else means a bug or incompatible change. */
} else if (errno != EAGAIN)
err(1, "Running guest failed");
@ -1691,13 +1916,14 @@ static struct option opts[] = {
{ "verbose", 0, NULL, 'v' },
{ "tunnet", 1, NULL, 't' },
{ "block", 1, NULL, 'b' },
{ "rng", 0, NULL, 'r' },
{ "initrd", 1, NULL, 'i' },
{ NULL },
};
static void usage(void)
{
errx(1, "Usage: lguest [--verbose] "
"[--tunnet=(<ipaddr>|bridge:<bridgename>)\n"
"[--tunnet=(<ipaddr>:<macaddr>|bridge:<bridgename>:<macaddr>)\n"
"|--block=<filename>|--initrd=<filename>]...\n"
"<mem-in-mb> vmlinux [args...]");
}
@ -1765,6 +1991,9 @@ int main(int argc, char *argv[])
case 'b':
setup_block_file(optarg);
break;
case 'r':
setup_rng();
break;
case 'i':
initrd_name = optarg;
break;
@ -1783,6 +2012,9 @@ int main(int argc, char *argv[])
/* We always have a console device */
setup_console();
/* We can timeout waiting for Guest network transmit. */
setup_timeout();
/* Now we load the kernel */
start = load_kernel(open_or_die(argv[optind+1], O_RDONLY));
@ -1826,10 +2058,10 @@ int main(int argc, char *argv[])
* /dev/lguest file descriptor. */
lguest_fd = tell_kernel(pgdir, start);
/* We fork off a child process, which wakes the Launcher whenever one
* of the input file descriptors needs attention. We call this the
* Waker, and we'll cover it in a moment. */
waker_fd = setup_waker(lguest_fd);
/* We clone off a thread, which wakes the Launcher whenever one of the
* input file descriptors needs attention. We call this the Waker, and
* we'll cover it in a moment. */
setup_waker(lguest_fd);
/* Finally, run the Guest. This doesn't return. */
run_guest(lguest_fd);

2
Documentation/local_ops.txt
View File

@ -36,7 +36,7 @@ It can be done by slightly modifying the standard atomic operations : only
their UP variant must be kept. It typically means removing LOCK prefix (on
i386 and x86_64) and any SMP sychronization barrier. If the architecture does
not have a different behavior between SMP and UP, including asm-generic/local.h
in your archtecture's local.h is sufficient.
in your architecture's local.h is sufficient.
The local_t type is defined as an opaque signed long by embedding an
atomic_long_t inside a structure. This is made so a cast from this type to a

8
Documentation/networking/Makefile Normal file
View File

@ -0,0 +1,8 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := ifenslave
# Tell kbuild to always build the programs
always := $(hostprogs-y)

2
Documentation/networking/bonding.txt
View File

@ -631,7 +631,7 @@ xmit_hash_policy
in environments where a layer3 gateway device is
required to reach most destinations.
This algorithm is 802.3ad complient.
This algorithm is 802.3ad compliant.
layer3+4

4
Documentation/networking/can.txt
View File

@ -186,7 +186,7 @@ solution for a couple of reasons:
The Linux network devices (by default) just can handle the
transmission and reception of media dependent frames. Due to the
arbritration on the CAN bus the transmission of a low prio CAN-ID
arbitration on the CAN bus the transmission of a low prio CAN-ID
may be delayed by the reception of a high prio CAN frame. To
reflect the correct* traffic on the node the loopback of the sent
data has to be performed right after a successful transmission. If
@ -481,7 +481,7 @@ solution for a couple of reasons:
- stats_timer: To calculate the Socket CAN core statistics
(e.g. current/maximum frames per second) this 1 second timer is
invoked at can.ko module start time by default. This timer can be
disabled by using stattimer=0 on the module comandline.
disabled by using stattimer=0 on the module commandline.
- debug: (removed since SocketCAN SVN r546)

2
Documentation/networking/ifenslave.c
View File

@ -1081,7 +1081,7 @@ static int set_if_addr(char *master_ifname, char *slave_ifname)
}
ipaddr = ifr.ifr_addr.sa_data;
ipaddr = (unsigned char *)ifr.ifr_addr.sa_data;
v_print("Interface '%s': set IP %s to %d.%d.%d.%d\n",
slave_ifname, ifra[i].desc,
ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);

2
Documentation/networking/packet_mmap.txt
View File

@ -326,7 +326,7 @@ just one call to mmap is needed:
mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
If tp_frame_size is a divisor of tp_block_size frames will be
contiguosly spaced by tp_frame_size bytes. If not, each
contiguously spaced by tp_frame_size bytes. If not, each
tp_block_size/tp_frame_size frames there will be a gap between
the frames. This is because a frame cannot be spawn across two
blocks.

15
Documentation/networking/tc-actions-env-rules.txt
View File

@ -4,26 +4,27 @@ The "enviromental" rules for authors of any new tc actions are:
1) If you stealeth or borroweth any packet thou shalt be branching
from the righteous path and thou shalt cloneth.
For example if your action queues a packet to be processed later
or intentionaly branches by redirecting a packet then you need to
For example if your action queues a packet to be processed later,
or intentionally branches by redirecting a packet, then you need to
clone the packet.
There are certain fields in the skb tc_verd that need to be reset so we
avoid loops etc. A few are generic enough so much so that skb_act_clone()
resets them for you. So invoke skb_act_clone() rather than skb_clone()
avoid loops, etc. A few are generic enough that skb_act_clone()
resets them for you, so invoke skb_act_clone() rather than skb_clone().
2) If you munge any packet thou shalt call pskb_expand_head in the case
someone else is referencing the skb. After that you "own" the skb.
You must also tell us if it is ok to munge the packet (TC_OK2MUNGE),
this way any action downstream can stomp on the packet.
3) dropping packets you dont own is a nono. You simply return
3) Dropping packets you don't own is a no-no. You simply return
TC_ACT_SHOT to the caller and they will drop it.
The "enviromental" rules for callers of actions (qdiscs etc) are:
*) thou art responsible for freeing anything returned as being
*) Thou art responsible for freeing anything returned as being
TC_ACT_SHOT/STOLEN/QUEUED. If none of TC_ACT_SHOT/STOLEN/QUEUED is
returned then all is great and you dont need to do anything.
returned, then all is great and you don't need to do anything.
Post on netdev if something is unclear.

10
Documentation/pcmcia/Makefile Normal file
View File

@ -0,0 +1,10 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := crc32hash
# Tell kbuild to always build the programs
always := $(hostprogs-y)
HOSTCFLAGS_crc32hash.o += -I$(objtree)/usr/include

2
Documentation/pcmcia/crc32hash.c
View File

@ -26,7 +26,7 @@ int main(int argc, char **argv) {
printf("no string passed as argument\n");
return -1;
}
result = crc32(argv[1], strlen(argv[1]));
result = crc32((unsigned char const *)argv[1], strlen(argv[1]));
printf("0x%x\n", result);
return 0;
}

7
Documentation/power/pm_qos_interface.txt
View File

@ -1,4 +1,4 @@
PM quality of Service interface.
PM Quality Of Service Interface.
This interface provides a kernel and user mode interface for registering
performance expectations by drivers, subsystems and user space applications on
@ -7,6 +7,11 @@ one of the parameters.
Currently we have {cpu_dma_latency, network_latency, network_throughput} as the
initial set of pm_qos parameters.
Each parameters have defined units:
* latency: usec
* timeout: usec
* throughput: kbs (kilo bit / sec)
The infrastructure exposes multiple misc device nodes one per implemented
parameter. The set of parameters implement is defined by pm_qos_power_init()
and pm_qos_params.h. This is done because having the available parameters

4
Documentation/power/power_supply_class.txt
View File

@ -101,6 +101,10 @@ of charge when battery became full/empty". It also could mean "value of
charge when battery considered full/empty at given conditions (temperature,
age)". I.e. these attributes represents real thresholds, not design values.
CHARGE_COUNTER - the current charge counter (in µAh). This could easily
be negative; there is no empty or full value. It is only useful for
relative, time-based measurements.
ENERGY_FULL, ENERGY_EMPTY - same as above but for energy.
CAPACITY - capacity in percents.

182
Documentation/power/regulator/consumer.txt Normal file
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@ -0,0 +1,182 @@
Regulator Consumer Driver Interface
===================================
This text describes the regulator interface for consumer device drivers.
Please see overview.txt for a description of the terms used in this text.
1. Consumer Regulator Access (static & dynamic drivers)
=======================================================
A consumer driver can get access to it's supply regulator by calling :-
regulator = regulator_get(dev, "Vcc");
The consumer passes in it's struct device pointer and power supply ID. The core
then finds the correct regulator by consulting a machine specific lookup table.
If the lookup is successful then this call will return a pointer to the struct
regulator that supplies this consumer.
To release the regulator the consumer driver should call :-
regulator_put(regulator);
Consumers can be supplied by more than one regulator e.g. codec consumer with
analog and digital supplies :-
digital = regulator_get(dev, "Vcc"); /* digital core */
analog = regulator_get(dev, "Avdd"); /* analog */
The regulator access functions regulator_get() and regulator_put() will
usually be called in your device drivers probe() and remove() respectively.
2. Regulator Output Enable & Disable (static & dynamic drivers)
====================================================================
A consumer can enable it's power supply by calling:-
int regulator_enable(regulator);
NOTE: The supply may already be enabled before regulator_enabled() is called.
This may happen if the consumer shares the regulator or the regulator has been
previously enabled by bootloader or kernel board initialization code.
A consumer can determine if a regulator is enabled by calling :-
int regulator_is_enabled(regulator);
This will return > zero when the regulator is enabled.
A consumer can disable it's supply when no longer needed by calling :-
int regulator_disable(regulator);
NOTE: This may not disable the supply if it's shared with other consumers. The
regulator will only be disabled when the enabled reference count is zero.
Finally, a regulator can be forcefully disabled in the case of an emergency :-
int regulator_force_disable(regulator);
NOTE: this will immediately and forcefully shutdown the regulator output. All
consumers will be powered off.
3. Regulator Voltage Control & Status (dynamic drivers)
======================================================
Some consumer drivers need to be able to dynamically change their supply
voltage to match system operating points. e.g. CPUfreq drivers can scale
voltage along with frequency to save power, SD drivers may need to select the
correct card voltage, etc.
Consumers can control their supply voltage by calling :-
int regulator_set_voltage(regulator, min_uV, max_uV);
Where min_uV and max_uV are the minimum and maximum acceptable voltages in
microvolts.
NOTE: this can be called when the regulator is enabled or disabled. If called
when enabled, then the voltage changes instantly, otherwise the voltage
configuration changes and the voltage is physically set when the regulator is
next enabled.
The regulators configured voltage output can be found by calling :-
int regulator_get_voltage(regulator);
NOTE: get_voltage() will return the configured output voltage whether the
regulator is enabled or disabled and should NOT be used to determine regulator
output state. However this can be used in conjunction with is_enabled() to
determine the regulator physical output voltage.
4. Regulator Current Limit Control & Status (dynamic drivers)
===========================================================
Some consumer drivers need to be able to dynamically change their supply
current limit to match system operating points. e.g. LCD backlight driver can
change the current limit to vary the backlight brightness, USB drivers may want
to set the limit to 500mA when supplying power.
Consumers can control their supply current limit by calling :-
int regulator_set_current_limit(regulator, min_uV, max_uV);
Where min_uA and max_uA are the minimum and maximum acceptable current limit in
microamps.
NOTE: this can be called when the regulator is enabled or disabled. If called
when enabled, then the current limit changes instantly, otherwise the current
limit configuration changes and the current limit is physically set when the
regulator is next enabled.
A regulators current limit can be found by calling :-
int regulator_get_current_limit(regulator);
NOTE: get_current_limit() will return the current limit whether the regulator
is enabled or disabled and should not be used to determine regulator current
load.
5. Regulator Operating Mode Control & Status (dynamic drivers)
=============================================================
Some consumers can further save system power by changing the operating mode of
their supply regulator to be more efficient when the consumers operating state
changes. e.g. consumer driver is idle and subsequently draws less current
Regulator operating mode can be changed indirectly or directly.
Indirect operating mode control.
--------------------------------
Consumer drivers can request a change in their supply regulator operating mode
by calling :-
int regulator_set_optimum_mode(struct regulator *regulator, int load_uA);
This will cause the core to recalculate the total load on the regulator (based
on all it's consumers) and change operating mode (if necessary and permitted)
to best match the current operating load.
The load_uA value can be determined from the consumers datasheet. e.g.most
datasheets have tables showing the max current consumed in certain situations.
Most consumers will use indirect operating mode control since they have no
knowledge of the regulator or whether the regulator is shared with other
consumers.
Direct operating mode control.
------------------------------
Bespoke or tightly coupled drivers may want to directly control regulator
operating mode depending on their operating point. This can be achieved by
calling :-
int regulator_set_mode(struct regulator *regulator, unsigned int mode);
unsigned int regulator_get_mode(struct regulator *regulator);
Direct mode will only be used by consumers that *know* about the regulator and
are not sharing the regulator with other consumers.
6. Regulator Events
===================
Regulators can notify consumers of external events. Events could be received by
consumers under regulator stress or failure conditions.
Consumers can register interest in regulator events by calling :-
int regulator_register_notifier(struct regulator *regulator,
struct notifier_block *nb);
Consumers can uregister interest by calling :-
int regulator_unregister_notifier(struct regulator *regulator,
struct notifier_block *nb);
Regulators use the kernel notifier framework to send event to thier interested
consumers.

101
Documentation/power/regulator/machine.txt Normal file
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@ -0,0 +1,101 @@
Regulator Machine Driver Interface
===================================
The regulator machine driver interface is intended for board/machine specific
initialisation code to configure the regulator subsystem. Typical things that
machine drivers would do are :-
1. Regulator -> Device mapping.
2. Regulator supply configuration.
3. Power Domain constraint setting.
1. Regulator -> device mapping
==============================
Consider the following machine :-
Regulator-1 -+-> Regulator-2 --> [Consumer A @ 1.8 - 2.0V]
|
+-> [Consumer B @ 3.3V]
The drivers for consumers A & B must be mapped to the correct regulator in
order to control their power supply. This mapping can be achieved in machine
initialisation code by calling :-
int regulator_set_device_supply(const char *regulator, struct device *dev,
const char *supply);
and is shown with the following code :-
regulator_set_device_supply("Regulator-1", devB, "Vcc");
regulator_set_device_supply("Regulator-2", devA, "Vcc");
This maps Regulator-1 to the 'Vcc' supply for Consumer B and maps Regulator-2
to the 'Vcc' supply for Consumer A.
2. Regulator supply configuration.
==================================
Consider the following machine (again) :-
Regulator-1 -+-> Regulator-2 --> [Consumer A @ 1.8 - 2.0V]
|
+-> [Consumer B @ 3.3V]
Regulator-1 supplies power to Regulator-2. This relationship must be registered
with the core so that Regulator-1 is also enabled when Consumer A enables it's
supply (Regulator-2).
This relationship can be register with the core via :-
int regulator_set_supply(const char *regulator, const char *regulator_supply);
In this example we would use the following code :-
regulator_set_supply("Regulator-2", "Regulator-1");
Relationships can be queried by calling :-
const char *regulator_get_supply(const char *regulator);
3. Power Domain constraint setting.
===================================
Each power domain within a system has physical constraints on voltage and
current. This must be defined in software so that the power domain is always
operated within specifications.
Consider the following machine (again) :-
Regulator-1 -+-> Regulator-2 --> [Consumer A @ 1.8 - 2.0V]
|
+-> [Consumer B @ 3.3V]
This gives us two regulators and two power domains:
Domain 1: Regulator-2, Consumer B.
Domain 2: Consumer A.
Constraints can be registered by calling :-
int regulator_set_platform_constraints(const char *regulator,
struct regulation_constraints *constraints);
The example is defined as follows :-
struct regulation_constraints domain_1 = {
.min_uV = 3300000,
.max_uV = 3300000,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
};
struct regulation_constraints domain_2 = {
.min_uV = 1800000,
.max_uV = 2000000,
.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
.valid_modes_mask = REGULATOR_MODE_NORMAL,
};
regulator_set_platform_constraints("Regulator-1", &domain_1);
regulator_set_platform_constraints("Regulator-2", &domain_2);

171
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@ -0,0 +1,171 @@
Linux voltage and current regulator framework
=============================================
About
=====
This framework is designed to provide a standard kernel interface to control
voltage and current regulators.
The intention is to allow systems to dynamically control regulator power output
in order to save power and prolong battery life. This applies to both voltage
regulators (where voltage output is controllable) and current sinks (where
current limit is controllable).
(C) 2008 Wolfson Microelectronics PLC.
Author: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Nomenclature
============
Some terms used in this document:-
o Regulator - Electronic device that supplies power to other devices.
Most regulators can enable and disable their output whilst
some can control their output voltage and or current.
Input Voltage -> Regulator -> Output Voltage
o PMIC - Power Management IC. An IC that contains numerous regulators
and often contains other susbsystems.
o Consumer - Electronic device that is supplied power by a regulator.
Consumers can be classified into two types:-
Static: consumer does not change it's supply voltage or
current limit. It only needs to enable or disable it's
power supply. It's supply voltage is set by the hardware,
bootloader, firmware or kernel board initialisation code.
Dynamic: consumer needs to change it's supply voltage or
current limit to meet operation demands.
o Power Domain - Electronic circuit that is supplied it's input power by the
output power of a regulator, switch or by another power
domain.
The supply regulator may be behind a switch(s). i.e.
Regulator -+-> Switch-1 -+-> Switch-2 --> [Consumer A]
| |
| +-> [Consumer B], [Consumer C]
|
+-> [Consumer D], [Consumer E]
That is one regulator and three power domains:
Domain 1: Switch-1, Consumers D & E.
Domain 2: Switch-2, Consumers B & C.
Domain 3: Consumer A.
and this represents a "supplies" relationship:
Domain-1 --> Domain-2 --> Domain-3.
A power domain may have regulators that are supplied power
by other regulators. i.e.
Regulator-1 -+-> Regulator-2 -+-> [Consumer A]
|
+-> [Consumer B]
This gives us two regulators and two power domains:
Domain 1: Regulator-2, Consumer B.
Domain 2: Consumer A.
and a "supplies" relationship:
Domain-1 --> Domain-2
o Constraints - Constraints are used to define power levels for performance
and hardware protection. Constraints exist at three levels:
Regulator Level: This is defined by the regulator hardware
operating parameters and is specified in the regulator
datasheet. i.e.
- voltage output is in the range 800mV -> 3500mV.
- regulator current output limit is 20mA @ 5V but is
10mA @ 10V.
Power Domain Level: This is defined in software by kernel
level board initialisation code. It is used to constrain a
power domain to a particular power range. i.e.
- Domain-1 voltage is 3300mV
- Domain-2 voltage is 1400mV -> 1600mV
- Domain-3 current limit is 0mA -> 20mA.
Consumer Level: This is defined by consumer drivers
dynamically setting voltage or current limit levels.
e.g. a consumer backlight driver asks for a current increase
from 5mA to 10mA to increase LCD illumination. This passes
to through the levels as follows :-
Consumer: need to increase LCD brightness. Lookup and
request next current mA value in brightness table (the
consumer driver could be used on several different
personalities based upon the same reference device).
Power Domain: is the new current limit within the domain
operating limits for this domain and system state (e.g.
battery power, USB power)
Regulator Domains: is the new current limit within the
regulator operating parameters for input/ouput voltage.
If the regulator request passes all the constraint tests
then the new regulator value is applied.
Design
======
The framework is designed and targeted at SoC based devices but may also be
relevant to non SoC devices and is split into the following four interfaces:-
1. Consumer driver interface.
This uses a similar API to the kernel clock interface in that consumer
drivers can get and put a regulator (like they can with clocks atm) and
get/set voltage, current limit, mode, enable and disable. This should
allow consumers complete control over their supply voltage and current
limit. This also compiles out if not in use so drivers can be reused in
systems with no regulator based power control.
See Documentation/power/regulator/consumer.txt
2. Regulator driver interface.
This allows regulator drivers to register their regulators and provide
operations to the core. It also has a notifier call chain for propagating
regulator events to clients.
See Documentation/power/regulator/regulator.txt
3. Machine interface.
This interface is for machine specific code and allows the creation of
voltage/current domains (with constraints) for each regulator. It can
provide regulator constraints that will prevent device damage through
overvoltage or over current caused by buggy client drivers. It also
allows the creation of a regulator tree whereby some regulators are
supplied by others (similar to a clock tree).
See Documentation/power/regulator/machine.txt
4. Userspace ABI.
The framework also exports a lot of useful voltage/current/opmode data to
userspace via sysfs. This could be used to help monitor device power
consumption and status.
See Documentation/ABI/testing/regulator-sysfs.txt

30
Documentation/power/regulator/regulator.txt Normal file
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@ -0,0 +1,30 @@
Regulator Driver Interface
==========================
The regulator driver interface is relatively simple and designed to allow
regulator drivers to register their services with the core framework.
Registration
============
Drivers can register a regulator by calling :-
struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
void *reg_data);
This will register the regulators capabilities and operations the regulator
core. The core does not touch reg_data (private to regulator driver).
Regulators can be unregistered by calling :-
void regulator_unregister(struct regulator_dev *rdev);
Regulator Events
================
Regulators can send events (e.g. over temp, under voltage, etc) to consumer
drivers by calling :-
int regulator_notifier_call_chain(struct regulator_dev *rdev,
unsigned long event, void *data);

2
Documentation/powerpc/00-INDEX
View File

@ -20,8 +20,6 @@ mpc52xx-device-tree-bindings.txt
- MPC5200 Device Tree Bindings
ppc_htab.txt
- info about the Linux/PPC /proc/ppc_htab entry
SBC8260_memory_mapping.txt
- EST SBC8260 board info
smp.txt
- use and state info about Linux/PPC on MP machines
sound.txt

197
Documentation/powerpc/SBC8260_memory_mapping.txt
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@ -1,197 +0,0 @@
Please mail me (Jon Diekema, diekema_jon@si.com or diekema@cideas.com)
if you have questions, comments or corrections.
* EST SBC8260 Linux memory mapping rules
http://www.estc.com/
http://www.estc.com/products/boards/SBC8260-8240_ds.html
Initial conditions:
-------------------
Tasks that need to be perform by the boot ROM before control is
transferred to zImage (compressed Linux kernel):
- Define the IMMR to 0xf0000000
- Initialize the memory controller so that RAM is available at
physical address 0x00000000. On the SBC8260 is this 16M (64M)
SDRAM.
- The boot ROM should only clear the RAM that it is using.
The reason for doing this is to enhances the chances of a
successful post mortem on a Linux panic. One of the first
items to examine is the 16k (LOG_BUF_LEN) circular console
buffer called log_buf which is defined in kernel/printk.c.
- To enhance boot ROM performance, the I-cache can be enabled.
Date: Mon, 22 May 2000 14:21:10 -0700
From: Neil Russell <caret@c-side.com>
LiMon (LInux MONitor) runs with and starts Linux with MMU
off, I-cache enabled, D-cache disabled. The I-cache doesn't
need hints from the MMU to work correctly as the D-cache
does. No D-cache means no special code to handle devices in
the presence of cache (no snooping, etc). The use of the
I-cache means that the monitor can run acceptably fast
directly from ROM, rather than having to copy it to RAM.
- Build the board information structure (see
include/asm-ppc/est8260.h for its definition)
- The compressed Linux kernel (zImage) contains a bootstrap loader
that is position independent; you can load it into any RAM,
ROM or FLASH memory address >= 0x00500000 (above 5 MB), or
at its link address of 0x00400000 (4 MB).
Note: If zImage is loaded at its link address of 0x00400000 (4 MB),
then zImage will skip the step of moving itself to
its link address.
- Load R3 with the address of the board information structure
- Transfer control to zImage
- The Linux console port is SMC1, and the baud rate is controlled
from the bi_baudrate field of the board information structure.
On thing to keep in mind when picking the baud rate, is that
there is no flow control on the SMC ports. I would stick
with something safe and standard like 19200.
On the EST SBC8260, the SMC1 port is on the COM1 connector of
the board.
EST SBC8260 defaults:
---------------------
Chip
Memory Sel Bus Use
--------------------- --- --- ----------------------------------
0x00000000-0x03FFFFFF CS2 60x (16M or 64M)/64M SDRAM
0x04000000-0x04FFFFFF CS4 local 4M/16M SDRAM (soldered to the board)
0x21000000-0x21000000 CS7 60x 1B/64K Flash present detect (from the flash SIMM)
0x21000001-0x21000001 CS7 60x 1B/64K Switches (read) and LEDs (write)
0x22000000-0x2200FFFF CS5 60x 8K/64K EEPROM
0xFC000000-0xFCFFFFFF CS6 60x 2M/16M flash (8 bits wide, soldered to the board)
0xFE000000-0xFFFFFFFF CS0 60x 4M/16M flash (SIMM)
Notes:
------
- The chip selects can map 32K blocks and up (powers of 2)
- The SDRAM machine can handled up to 128Mbytes per chip select
- Linux uses the 60x bus memory (the SDRAM DIMM) for the
communications buffers.
- BATs can map 128K-256Mbytes each. There are four data BATs and
four instruction BATs. Generally the data and instruction BATs
are mapped the same.
- The IMMR must be set above the kernel virtual memory addresses,
which start at 0xC0000000. Otherwise, the kernel may crash as
soon as you start any threads or processes due to VM collisions
in the kernel or user process space.
Details from Dan Malek <dan_malek@mvista.com> on 10/29/1999:
The user application virtual space consumes the first 2 Gbytes
(0x00000000 to 0x7FFFFFFF). The kernel virtual text starts at
0xC0000000, with data following. There is a "protection hole"
between the end of kernel data and the start of the kernel
dynamically allocated space, but this space is still within
0xCxxxxxxx.
Obviously the kernel can't map any physical addresses 1:1 in
these ranges.
Details from Dan Malek <dan_malek@mvista.com> on 5/19/2000:
During the early kernel initialization, the kernel virtual
memory allocator is not operational. Prior to this KVM
initialization, we choose to map virtual to physical addresses
1:1. That is, the kernel virtual address exactly matches the
physical address on the bus. These mappings are typically done
in arch/ppc/kernel/head.S, or arch/ppc/mm/init.c. Only
absolutely necessary mappings should be done at this time, for
example board control registers or a serial uart. Normal device
driver initialization should map resources later when necessary.
Although platform dependent, and certainly the case for embedded
8xx, traditionally memory is mapped at physical address zero,
and I/O devices above physical address 0x80000000. The lowest
and highest (above 0xf0000000) I/O addresses are traditionally
used for devices or registers we need to map during kernel
initialization and prior to KVM operation. For this reason,
and since it followed prior PowerPC platform examples, I chose
to map the embedded 8xx kernel to the 0xc0000000 virtual address.
This way, we can enable the MMU to map the kernel for proper
operation, and still map a few windows before the KVM is operational.
On some systems, you could possibly run the kernel at the
0x80000000 or any other virtual address. It just depends upon
mapping that must be done prior to KVM operational. You can never
map devices or kernel spaces that overlap with the user virtual
space. This is why default IMMR mapping used by most BDM tools
won't work. They put the IMMR at something like 0x10000000 or
0x02000000 for example. You simply can't map these addresses early
in the kernel, and continue proper system operation.
The embedded 8xx/82xx kernel is mature enough that all you should
need to do is map the IMMR someplace at or above 0xf0000000 and it
should boot far enough to get serial console messages and KGDB
connected on any platform. There are lots of other subtle memory
management design features that you simply don't need to worry
about. If you are changing functions related to MMU initialization,
you are likely breaking things that are known to work and are
heading down a path of disaster and frustration. Your changes
should be to make the flexibility of the processor fit Linux,
not force arbitrary and non-workable memory mappings into Linux.
- You don't want to change KERNELLOAD or KERNELBASE, otherwise the
virtual memory and MMU code will get confused.
arch/ppc/Makefile:KERNELLOAD = 0xc0000000
include/asm-ppc/page.h:#define PAGE_OFFSET 0xc0000000
include/asm-ppc/page.h:#define KERNELBASE PAGE_OFFSET
- RAM is at physical address 0x00000000, and gets mapped to
virtual address 0xC0000000 for the kernel.
Physical addresses used by the Linux kernel:
--------------------------------------------
0x00000000-0x3FFFFFFF 1GB reserved for RAM
0xF0000000-0xF001FFFF 128K IMMR 64K used for dual port memory,
64K for 8260 registers
Logical addresses used by the Linux kernel:
-------------------------------------------
0xF0000000-0xFFFFFFFF 256M BAT0 (IMMR: dual port RAM, registers)
0xE0000000-0xEFFFFFFF 256M BAT1 (I/O space for custom boards)
0xC0000000-0xCFFFFFFF 256M BAT2 (RAM)
0xD0000000-0xDFFFFFFF 256M BAT3 (if RAM > 256MByte)
EST SBC8260 Linux mapping:
--------------------------
DBAT0, IBAT0, cache inhibited:
Chip
Memory Sel Use
--------------------- --- ---------------------------------
0xF0000000-0xF001FFFF n/a IMMR: dual port RAM, registers
DBAT1, IBAT1, cache inhibited:

12
Documentation/powerpc/booting-without-of.txt
View File

@ -278,7 +278,7 @@ it with special cases.
a 64-bit platform.
d) request and get assigned a platform number (see PLATFORM_*
constants in include/asm-powerpc/processor.h
constants in arch/powerpc/include/asm/processor.h
32-bit embedded kernels:
@ -340,7 +340,7 @@ the block to RAM before passing it to the kernel.
---------
The kernel is entered with r3 pointing to an area of memory that is
roughly described in include/asm-powerpc/prom.h by the structure
roughly described in arch/powerpc/include/asm/prom.h by the structure
boot_param_header:
struct boot_param_header {
@ -708,7 +708,7 @@ device or bus to be described by the device tree.
In general, the format of an address for a device is defined by the
parent bus type, based on the #address-cells and #size-cells
properties. Note that the parent's parent definitions of #address-cells
and #size-cells are not inhereted so every node with children must specify
and #size-cells are not inherited so every node with children must specify
them. The kernel requires the root node to have those properties defining
addresses format for devices directly mapped on the processor bus.
@ -1777,7 +1777,7 @@ platforms are moved over to use the flattened-device-tree model.
Xilinx uartlite devices are simple fixed speed serial ports.
Requred properties:
Required properties:
- current-speed : Baud rate of uartlite
v) Xilinx hwicap
@ -1799,7 +1799,7 @@ platforms are moved over to use the flattened-device-tree model.
Xilinx UART 16550 devices are very similar to the NS16550 but with
different register spacing and an offset from the base address.
Requred properties:
Required properties:
- clock-frequency : Frequency of the clock input
- reg-offset : A value of 3 is required
- reg-shift : A value of 2 is required
@ -1953,7 +1953,7 @@ prefixed with the string "marvell,", for Marvell Technology Group Ltd.
1) The /system-controller node
This node is used to represent the system-controller and must be
present when the system uses a system contller chip. The top-level
present when the system uses a system controller chip. The top-level
system-controller node contains information that is global to all
devices within the system controller chip. The node name begins
with "system-controller" followed by the unit address, which is

11
Documentation/powerpc/dts-bindings/fsl/cpm_qe/serial.txt
View File

@ -7,6 +7,15 @@ Currently defined compatibles:
- fsl,cpm2-scc-uart
- fsl,qe-uart
Modem control lines connected to GPIO controllers are listed in the gpios
property as described in booting-without-of.txt, section IX.1 in the following
order:
CTS, RTS, DCD, DSR, DTR, and RI.
The gpios property is optional and can be left out when control lines are
not used.
Example:
serial@11a00 {
@ -18,4 +27,6 @@ Example:
interrupt-parent = <&PIC>;
fsl,cpm-brg = <1>;
fsl,cpm-command = <00800000>;
gpios = <&gpio_c 15 0
&gpio_d 29 0>;
};

2
Documentation/powerpc/eeh-pci-error-recovery.txt
View File

@ -133,7 +133,7 @@ error. Given an arbitrary address, the routine
pci_get_device_by_addr() will find the pci device associated
with that address (if any).
The default include/asm-powerpc/io.h macros readb(), inb(), insb(),
The default arch/powerpc/include/asm/io.h macros readb(), inb(), insb(),
etc. include a check to see if the i/o read returned all-0xff's.
If so, these make a call to eeh_dn_check_failure(), which in turn
asks the firmware if the all-ff's value is the sign of a true EEH

2
Documentation/powerpc/qe_firmware.txt
View File

@ -217,7 +217,7 @@ Although it is not recommended, you can specify '0' in the soc.model
field to skip matching SOCs altogether.
The 'model' field is a 16-bit number that matches the actual SOC. The
'major' and 'minor' fields are the major and minor revision numbrs,
'major' and 'minor' fields are the major and minor revision numbers,
respectively, of the SOC.
For example, to match the 8323, revision 1.0:

20
Documentation/rfkill.txt
View File

@ -390,9 +390,10 @@ rfkill lines are inactive, it must return RFKILL_STATE_SOFT_BLOCKED if its soft
rfkill input line is active. Only if none of the rfkill input lines are
active, will it return RFKILL_STATE_UNBLOCKED.
If it doesn't implement the get_state() hook, it must make sure that its calls
to rfkill_force_state() are enough to keep the status always up-to-date, and it
must do a rfkill_force_state() on resume from sleep.
Since the device has a hardware rfkill line, it IS subject to state changes
external to rfkill. Therefore, the driver must make sure that it calls
rfkill_force_state() to keep the status always up-to-date, and it must do a
rfkill_force_state() on resume from sleep.
Every time the driver gets a notification from the card that one of its rfkill
lines changed state (polling might be needed on badly designed cards that don't
@ -422,13 +423,24 @@ of the hardware is unknown), or read-write (where the hardware can be queried
about its current state).
The rfkill class will call the get_state hook of a device every time it needs
to know the *real* current state of the hardware. This can happen often.
to know the *real* current state of the hardware. This can happen often, but
it does not do any polling, so it is not enough on hardware that is subject
to state changes outside of the rfkill subsystem.
Therefore, calling rfkill_force_state() when a state change happens is
mandatory when the device has a hardware rfkill line, or when something else
like the firmware could cause its state to be changed without going through the
rfkill class.
Some hardware provides events when its status changes. In these cases, it is
best for the driver to not provide a get_state hook, and instead register the
rfkill class *already* with the correct status, and keep it updated using
rfkill_force_state() when it gets an event from the hardware.
rfkill_force_state() must be used on the device resume handlers to update the
rfkill status, should there be any chance of the device status changing during
the sleep.
There is no provision for a statically-allocated rfkill struct. You must
use rfkill_allocate() to allocate one.

2
Documentation/s390/driver-model.txt
View File

@ -25,7 +25,7 @@ device 4711 via subchannel 1 in subchannel set 0, and subchannel 2 is a non-I/O
subchannel. Device 1234 is accessed via subchannel 0 in subchannel set 1.
The subchannel named 'defunct' does not represent any real subchannel on the
system; it is a pseudo subchannel where disconnnected ccw devices are moved to
system; it is a pseudo subchannel where disconnected ccw devices are moved to
if they are displaced by another ccw device becoming operational on their
former subchannel. The ccw devices will be moved again to a proper subchannel
if they become operational again on that subchannel.

6
Documentation/scsi/ibmmca.txt
View File

@ -524,7 +524,7 @@
- Michael Lang
June 25 1997: (v1.8b)
1) Some cosmetical changes for the handling of SCSI-device-types.
1) Some cosmetic changes for the handling of SCSI-device-types.
Now, also CD-Burners / WORMs and SCSI-scanners should work. For
MO-drives I have no experience, therefore not yet supported.
In logical_devices I changed from different type-variables to one
@ -914,7 +914,7 @@
in version 4.0. This was never really necessary, as all troubles were
based on non-command related reasons up to now, so bypassing commands
did not help to avoid any bugs. It is kept in 3.2X for debugging reasons.
5) Dynamical reassignment of ldns was again verified and analyzed to be
5) Dynamic reassignment of ldns was again verified and analyzed to be
completely inoperational. This is corrected and should work now.
6) All commands that get sent to the SCSI adapter were verified and
completed in such a way, that they are now completely conform to the
@ -1386,7 +1386,7 @@
concerning the Linux-kernel in special, this SCSI-driver comes without any
warranty. Its functionality is tested as good as possible on certain
machines and combinations of computer hardware, which does not exclude,
that dataloss or severe damage of hardware is possible while using this
that data loss or severe damage of hardware is possible while using this
part of software on some arbitrary computer hardware or in combination
with other software packages. It is highly recommended to make backup
copies of your data before using this software. Furthermore, personal

2
Documentation/scsi/lpfc.txt
View File

@ -36,7 +36,7 @@ Cable pull and temporary device Loss:
being removed, a switch rebooting, or a device reboot), the driver could
hide the disappearance of the device from the midlayer. I/O's issued to
the LLDD would simply be queued for a short duration, allowing the device
to reappear or link come back alive, with no inadvertant side effects
to reappear or link come back alive, with no inadvertent side effects
to the system. If the driver did not hide these conditions, i/o would be
errored by the driver, the mid-layer would exhaust its retries, and the
device would be taken offline. Manual intervention would be required to

6
Documentation/scsi/scsi_fc_transport.txt
View File

@ -65,7 +65,7 @@ Overview:
discussion will concentrate on NPIV.
Note: World Wide Name assignment (and uniqueness guarantees) are left
up to an administrative entity controling the vport. For example,
up to an administrative entity controlling the vport. For example,
if vports are to be associated with virtual machines, a XEN mgmt
utility would be responsible for creating wwpn/wwnn's for the vport,
using it's own naming authority and OUI. (Note: it already does this
@ -91,7 +91,7 @@ Device Trees and Vport Objects:
Here's what to expect in the device tree :
The typical Physical Port's Scsi_Host:
/sys/devices/.../host17/
and it has the typical decendent tree:
and it has the typical descendant tree:
/sys/devices/.../host17/rport-17:0-0/target17:0:0/17:0:0:0:
and then the vport is created on the Physical Port:
/sys/devices/.../host17/vport-17:0-0
@ -192,7 +192,7 @@ Vport States:
independent of the adapter's link state.
- Instantiation of the vport on the FC link via ELS traffic, etc.
This is equivalent to a "link up" and successfull link initialization.
Futher information can be found in the interfaces section below for
Further information can be found in the interfaces section below for
Vport Creation.
Once a vport has been instantiated with the kernel/LLDD, a vport state

2
Documentation/sh/clk.txt
View File

@ -12,7 +12,7 @@ means no changes to adjanced clock
Internally, the clk_set_rate_ex forwards request to clk->ops->set_rate method,
if it is present in ops structure. The method should set the clock rate and adjust
all needed clocks according to the passed algo_id.
Exact values for algo_id are machine-dependend. For the sh7722, the following
Exact values for algo_id are machine-dependent. For the sh7722, the following
values are defined:
NO_CHANGE = 0,

11
Documentation/sound/alsa/ALSA-Configuration.txt
View File

@ -1024,6 +1024,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
intel-mac-v3 Intel Mac Type 3
intel-mac-v4 Intel Mac Type 4
intel-mac-v5 Intel Mac Type 5
intel-mac-auto Intel Mac (detect type according to subsystem id)
macmini Intel Mac Mini (equivalent with type 3)
macbook Intel Mac Book (eq. type 5)
macbook-pro-v1 Intel Mac Book Pro 1st generation (eq. type 3)
@ -1143,8 +1144,6 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
This module supports autoprobe and multiple cards.
Power management is _not_ supported.
Module snd-ice1712
------------------
@ -1627,8 +1626,6 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
This module supports autoprobe and multiple cards.
Power management is _not_ supported.
Module snd-pcsp
-----------------
@ -2080,13 +2077,11 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
Module snd-virtuoso
-------------------
Module for sound cards based on the Asus AV200 chip, i.e.,
Xonar D2 and Xonar D2X.
Module for sound cards based on the Asus AV100/AV200 chips,
i.e., Xonar D1, DX, D2 and D2X.
This module supports autoprobe and multiple cards.
Power management is _not_ supported.
Module snd-vx222
----------------

10
Documentation/sound/alsa/Audiophile-Usb.txt
View File

@ -236,15 +236,15 @@ The parameter can be given:
alias snd-card-1 snd-usb-audio
options snd-usb-audio index=1 device_setup=0x09
CAUTION when initializaing the device
CAUTION when initializing the device
-------------------------------------
* Correct initialization on the device requires that device_setup is given to
the module BEFORE the device is turned on. So, if you use the "manual probing"
method described above, take care to power-on the device AFTER this initialization.
* Failing to respect this will lead in a misconfiguration of the device. In this case
turn off the device, unproble the snd-usb-audio module, then probe it again with
* Failing to respect this will lead to a misconfiguration of the device. In this case
turn off the device, unprobe the snd-usb-audio module, then probe it again with
correct device_setup parameter and then (and only then) turn on the device again.
* If you've correctly initialized the device in a valid mode and then want to switch
@ -388,9 +388,9 @@ There are 2 main potential issues when using Jackd with the device:
Jack supports big endian devices only in recent versions (thanks to
Andreas Steinmetz for his first big-endian patch). I can't remember
extacly when this support was released into jackd, let's just say that
exactly when this support was released into jackd, let's just say that
with jackd version 0.103.0 it's almost ok (just a small bug is affecting
16bits Big-Endian devices, but since you've read carefully the above
16bits Big-Endian devices, but since you've read carefully the above
paragraphs, you're now using kernel >= 2.6.23 and your 16bits devices
are now Little Endians ;-) ).

2
Documentation/sound/alsa/hda_codec.txt
View File

@ -67,7 +67,7 @@ CONFIG_SND_HDA_POWER_SAVE kconfig. It's called when the codec needs
to power up or may power down. The controller should check the all
belonging codecs on the bus whether they are actually powered off
(check codec->power_on), and optionally the driver may power down the
contoller side, too.
controller side, too.
The bus instance is created via snd_hda_bus_new(). You need to pass
the card instance, the template, and the pointer to store the

2
Documentation/sound/alsa/soc/dapm.txt
View File

@ -68,7 +68,7 @@ Audio DAPM widgets fall into a number of types:-
(Widgets are defined in include/sound/soc-dapm.h)
Widgets are usually added in the codec driver and the machine driver. There are
convience macros defined in soc-dapm.h that can be used to quickly build a
convenience macros defined in soc-dapm.h that can be used to quickly build a
list of widgets of the codecs and machines DAPM widgets.
Most widgets have a name, register, shift and invert. Some widgets have extra

8
Documentation/sparse.txt
View File

@ -73,10 +73,10 @@ recompiled, or use "make C=2" to run sparse on the files whether they need to
be recompiled or not. The latter is a fast way to check the whole tree if you
have already built it.
The optional make variable CHECKFLAGS can be used to pass arguments to sparse.
The build system passes -Wbitwise to sparse automatically. To perform
endianness checks, you may define __CHECK_ENDIAN__:
The optional make variable CF can be used to pass arguments to sparse. The
build system passes -Wbitwise to sparse automatically. To perform endianness
checks, you may define __CHECK_ENDIAN__:
make C=2 CHECKFLAGS="-D__CHECK_ENDIAN__"
make C=2 CF="-D__CHECK_ENDIAN__"
These checks are disabled by default as they generate a host of warnings.

11
Documentation/spi/Makefile Normal file
View File

@ -0,0 +1,11 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := spidev_test spidev_fdx
# Tell kbuild to always build the programs
always := $(hostprogs-y)
HOSTCFLAGS_spidev_test.o += -I$(objtree)/usr/include
HOSTCFLAGS_spidev_fdx.o += -I$(objtree)/usr/include

4
Documentation/spi/pxa2xx
View File

@ -19,7 +19,7 @@ Declaring PXA2xx Master Controllers
-----------------------------------
Typically a SPI master is defined in the arch/.../mach-*/board-*.c as a
"platform device". The master configuration is passed to the driver via a table
found in include/asm-arm/arch-pxa/pxa2xx_spi.h:
found in arch/arm/mach-pxa/include/mach/pxa2xx_spi.h:
struct pxa2xx_spi_master {
enum pxa_ssp_type ssp_type;
@ -94,7 +94,7 @@ using the "spi_board_info" structure found in "linux/spi/spi.h". See
Each slave device attached to the PXA must provide slave specific configuration
information via the structure "pxa2xx_spi_chip" found in
"include/asm-arm/arch-pxa/pxa2xx_spi.h". The pxa2xx_spi master controller driver
"arch/arm/mach-pxa/include/mach/pxa2xx_spi.h". The pxa2xx_spi master controller driver
will uses the configuration whenever the driver communicates with the slave
device.

4
Documentation/spi/spi-summary
View File

@ -210,7 +210,7 @@ board should normally be set up and registered.
So for example arch/.../mach-*/board-*.c files might have code like:
#include <asm/arch/spi.h> /* for mysoc_spi_data */
#include <mach/spi.h> /* for mysoc_spi_data */
/* if your mach-* infrastructure doesn't support kernels that can
* run on multiple boards, pdata wouldn't benefit from "__init".
@ -227,7 +227,7 @@ So for example arch/.../mach-*/board-*.c files might have code like:
And SOC-specific utility code might look something like:
#include <asm/arch/spi.h>
#include <mach/spi.h>
static struct platform_device spi2 = { ... };

2
Documentation/sysctl/vm.txt
View File

@ -116,7 +116,7 @@ of kilobytes free. The VM uses this number to compute a pages_min
value for each lowmem zone in the system. Each lowmem zone gets
a number of reserved free pages based proportionally on its size.
Some minimal ammount of memory is needed to satisfy PF_MEMALLOC
Some minimal amount of memory is needed to satisfy PF_MEMALLOC
allocations; if you set this to lower than 1024KB, your system will
become subtly broken, and prone to deadlock under high loads.

2
Documentation/timers/highres.txt
View File

@ -125,7 +125,7 @@ increase of flexibility and the avoidance of duplicated code across
architectures justifies the slight increase of the binary size.
The conversion of an architecture has no functional impact, but allows to
utilize the high resolution and dynamic tick functionalites without any change
utilize the high resolution and dynamic tick functionalities without any change
to the clock event device and timer interrupt code. After the conversion the
enabling of high resolution timers and dynamic ticks is simply provided by
adding the kernel/time/Kconfig file to the architecture specific Kconfig and

30
Documentation/usb/auerswald.txt
View File

@ -1,30 +0,0 @@
Auerswald USB kernel driver
===========================
What is it? What can I do with it?
==================================
The auerswald USB kernel driver connects your linux 2.4.x
system to the auerswald usb-enabled devices.
There are two types of auerswald usb devices:
a) small PBX systems (ISDN)
b) COMfort system telephones (ISDN)
The driver installation creates the devices
/dev/usb/auer0..15. These devices carry a vendor-
specific protocol. You may run all auerswald java
software on it. The java software needs a native
library "libAuerUsbJNINative.so" installed on
your system. This library is available from
auerswald and shipped as part of the java software.
You may create the devices with:
mknod -m 666 /dev/usb/auer0 c 180 112
...
mknod -m 666 /dev/usb/auer15 c 180 127
Future plans
============
- Connection to ISDN4LINUX (the hisax interface)
The maintainer of this driver is wolfgang@iksw-muees.de

2
Documentation/usb/authorization.txt
View File

@ -8,7 +8,7 @@ not) in a system. This feature will allow you to implement a lock-down
of USB devices, fully controlled by user space.
As of now, when a USB device is connected it is configured and
it's interfaces inmediately made available to the users. With this
its interfaces are immediately made available to the users. With this
modification, only if root authorizes the device to be configured will
then it be possible to use it.

7
Documentation/usb/power-management.txt
View File

@ -436,7 +436,12 @@ post_reset; the USB core guarantees that this is true of internal
suspend/resume events as well.
If a driver wants to block all suspend/resume calls during some
critical section, it can simply acquire udev->pm_mutex.
critical section, it can simply acquire udev->pm_mutex. Note that
calls to resume may be triggered indirectly. Block IO due to memory
allocations can make the vm subsystem resume a device. Thus while
holding this lock you must not allocate memory with GFP_KERNEL or
GFP_NOFS.
Alternatively, if the critical section might call some of the
usb_autopm_* routines, the driver can avoid deadlock by doing:

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