It's a somewhat twisty maze of hints and behavioural modifiers, try
and clear it up a bit with some documentation.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
It's used by DM and MD and generally useful, so move the bio list
helpers into bio.h.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* 'drm-intel-next' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel:
drm/i915: fix scheduling while holding the new active list spinlock
drm/i915: Allow tiling of objects with bit 17 swizzling by the CPU.
drm/i915: Correctly set the write flag for get_user_pages in pread.
drm/i915: Fix use of uninitialized var in 40a5f0de
drm/i915: indicate framebuffer restore key in SysRq help message
drm/i915: sync hdmi detection by hdmi identifier with 2D
drm/i915: Fix a mismerge of the IGD patch (new .find_pll hooks missed)
drm/i915: Implement batch and ring buffer dumping
Revert part of af5c820a31 ("x86: cpumask:
use work_on_cpu in arch/x86/kernel/microcode_core.c")
That change is causing only one Intel CPU's microcode to be updated e.g.
microcode: CPU3 updated from revision 0x9 to 0x17, date = 2005-04-22
where before it announced that also for CPU0 and CPU1 and CPU2.
We cannot use work_on_cpu() in the CONFIG_MICROCODE_OLD_INTERFACE code,
because Intel's request_microcode_user() involves a copy_from_user() from
/sbin/microcode_ctl, which therefore needs to be on that CPU at the time.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
regression caused by commit 5e118f4139feafe97e913df67b1f7c1e5083e535:
i915_gem_object_move_to_inactive() should be called in task context,
as it calls fput();
Signed-off-by: Shaohua Li<shaohua.li@intel.com>
[anholt: Add more detail to the comment about the lock break that's added]
Signed-off-by: Eric Anholt <eric@anholt.net>
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
lockdep: warn about lockdep disabling after kernel taint, fix
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: fix "direct_io" private mmap
fuse: fix argument type in fuse_get_user_pages()
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
nilfs2: fix possible mismatch of sufile counters on recovery
nilfs2: segment usage file cleanups
nilfs2: fix wrong accounting and duplicate brelse in nilfs_sufile_set_error
nilfs2: simplify handling of active state of segments fix
nilfs2: remove module version
nilfs2: fix lockdep recursive locking warning on meta data files
nilfs2: fix lockdep recursive locking warning on bmap
nilfs2: return f_fsid for statfs2
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: Add in PCI bus for DMA API debugging.
sh: Pre-allocate a reasonable number of DMA debug entries.
sh: sh7786: modify usb setup timeout judgment bug.
MAINTAINERS: Update sh architecture file patterns.
sh: ap325: use edge control for ov772x camera
sh: Plug in support for ARCH=sh64 using sh SRCARCH.
sh: urquell: Fix up address mapping in board comments.
sh: Add support for DMA API debugging.
sh: Provide cpumask_of_pcibus() to fix NUMA build.
sh: urquell: Add board comment
sh: wire up sys_preadv/sys_pwritev() syscalls.
sh: sh7785lcr: fix PCI address map for 32-bit mode
sh: intc: Added resume from hibernation support to the intc
Fix lpfc_parse_bg_err()'s use of do_div(). It should be passing a 64-bit
variable as the first parameter. However, since it's only using a 32-bit
variable, it doesn't need to use do_div() at all, but can instead use the
division operator.
This deals with the following warnings:
CC drivers/scsi/lpfc/lpfc_scsi.o
drivers/scsi/lpfc/lpfc_scsi.c: In function 'lpfc_parse_bg_err':
drivers/scsi/lpfc/lpfc_scsi.c:1397: warning: comparison of distinct pointer types lacks a cast
drivers/scsi/lpfc/lpfc_scsi.c:1397: warning: right shift count >= width of type
drivers/scsi/lpfc/lpfc_scsi.c:1397: warning: passing argument 1 of '__div64_32' from incompatible pointer type
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In commit 51dcdfec6a ("parport: Use the
PCI IRQ if offered") parport_pc_probe_port() gained an irqflags arg.
This isn't being supplied on powerpc. This patch make powerpc fallback
to the old behaviour, that is using "0" for irqflags.
Fixes build failure:
In file included from drivers/parport/parport_pc.c:68:
arch/powerpc/include/asm/parport.h: In function 'parport_pc_find_nonpci_ports':
arch/powerpc/include/asm/parport.h:32: error: too few arguments to function 'parport_pc_probe_port'
arch/powerpc/include/asm/parport.h:32: error: too few arguments to function 'parport_pc_probe_port'
arch/powerpc/include/asm/parport.h:32: error: too few arguments to function 'parport_pc_probe_port'
make[3]: *** [drivers/parport/parport_pc.o] Error 1
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If the ti-usb adapter returns an zero data length frame (which happens)
then we leak a kref. Found by Christoph Mair <christoph.mair@gmail.com>
who proposed a patch. The patch here is different as Christoph's patch
didn't work for the case where tty = NULL and data arrived but Christoph
did all the hard work chasing it down.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ACM sets the low latency flag but calls the flip buffer routines from
IRQ context which isn't permitted (and as of 2.6.29 causes a warning
hence this one was caught)
Fortunatelt ACM doesn't need to set this flag in the first place as it
only set it to work around problems in ancient (pre tty flip rewrite)
kernels.
Reported-by: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Impact: build fix for Sparc and s390
Stephen Rothwell reported that the Sparc build broke:
In file included from kernel/panic.c:12:
include/linux/debug_locks.h: In function '__debug_locks_off':
include/linux/debug_locks.h:15: error: implicit declaration of function 'xchg'
due to:
9eeba61: lockdep: warn about lockdep disabling after kernel taint
There is some inconsistency between architectures about where exactly
xchg() is defined.
The traditional place is in system.h but the more logical point for it
is in atomic.h - where most architectures (especially new ones) have
it defined. These architecture also still offer it via system.h.
Some, such as Sparc or s390 only have it in asm/system.h and not available
via asm/atomic.h at all.
Use the widest set of headers in debug_locks.h and also include asm/system.h.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <20090414144317.026498df.sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This changes was introduce with
commit: cb9eff0978
net: new user space API for time stamping of incoming and outgoing packets
Signed-off-by: Michal Simek <monstr@monstr.eu>
Adding one new line was recommended solution.
Test with make distclean
Tested-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
This prevents the DMA API debugging from running out of entries right
away on boot. Defines 4096 entries by default, which while a bit on the
heavy side, ought to leave enough breathing room for some time.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
tomoyo: version bump to 2.2.0.
tomoyo: add Documentation/tomoyo.txt
We ended up incorrectly using '&cur' instead of '&readin' in the
work_on_cpu() -> smp_call_function_single() transformation in commit
01599fca67 ("cpufreq: use
smp_call_function_[single|many]() in acpi-cpufreq.c").
Andrew explains:
"OK, the acpi tree went and had conflicting changes merged into it after
I'd written the patch and it appears that I incorrectly reverted part
of 18b2646fe3 while fixing the resulting
rejects.
Switching it to `readin' looks correct."
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-rc1/xen/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
xen: add FIX_TEXT_POKE to fixmap
xen: honour VCPU availability on boot
xen: clean up gate trap/interrupt constants
xen: set _PAGE_NX in __supported_pte_mask before pagetable construction
xen: resume interrupts before system devices.
xen/mmu: weaken flush_tlb_other test
xen/mmu: some early pagetable cleanups
Xen: Add virt_to_pfn helper function
x86-64: remove PGE from must-have feature list
xen: mask XSAVE from cpuid
NULL noise: arch/x86/xen/smp.c
xen: remove xen_load_gdt debug
xen: make xen_load_gdt simpler
xen: clean up xen_load_gdt
xen: split construction of p2m mfn tables from registration
xen: separate p2m allocation from setting
xen: disable preempt for leave_lazy_mmu
This corrects a race with the PHY RST bit not being set properly if the
PLL status changes right before timeout. This resulted in it potentially
failing even if the device came up in time.
Special thanks to Mr. Juha Leppanen and Iwamatsu-san for reporting this
out and reviewing it.
Reported-by: Juha Leppanen <juha_motorsportcom@luukku.com>
Reviewed-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Tested-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
The edac-core driver includes code which assumes that the work_struct
which is included in every delayed_work is the first member of that
structure. This is currently the case but might change in the future, so
use to_delayed_work() instead, which doesn't make such an assumption.
linux-2.6.30-rc1 has the to_delayed_work() function that will allow this
patch to work
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix the edac local pci_write_bits32 to properly note the 'escape' mask if
all ones in a 32-bit word.
Currently no consumer of this function uses that mask, so there is no
danger to existing code.
Signed-off-by: Jeff Haran <jharan@Brocade.COM>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Introduce xpc_arch_ops and eliminate numerous individual global definitions.
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
sgi-xpc has a window of failure where an open message can be sent and a
subsequent data message can get lost. We have added a new message
(opencomplete) which closes that window.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The heartbeat timeout functionality in sgi-xpc is currently not trained to
the connection time. If a connection is made and the code is in the last
polling window prior to doing a timeout, the next polling window will see
the heartbeat as unchanged and initiate a no-heartbeat disconnect.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Dean has moved on to other work. His responsibilities for XP/XPC/XPNET
have been handed to me.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use the default mountpoint of debugfs in the pktcdvd ABI.
Signed-off-by: Shen Feng <shen@cn.fujitsu.com>
Cc: <balagi@justmail.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The description about various statistics from memory.stat is not accurate
and confusing at times.
Correct this along with a few other minor cleanups.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is the second go through of the old DMA_nBIT_MASK macro,and there're not
so many of them left,so I put them into one patch.I hope this is the last round.
After this the definition of the old DMA_nBIT_MASK macro could be removed.
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Tony Lindgren <tony@atomide.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Greg KH <greg@kroah.com>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If two writers allocating blocks to file race with each other (e.g.
because writepages races with ordinary write or two writepages race with
each other), ext2_getblock() can be called on the same inode in parallel.
Before we are going to allocate new blocks, we have to recheck the block
chain we have obtained so far without holding truncate_mutex. Otherwise
we could overwrite the indirect block pointer set by the other writer
leading to data loss.
The below test program by Ying is able to reproduce the data loss with ext2
on in BRD in a few minutes if the machine is under memory pressure:
long kMemSize = 50 << 20;
int kPageSize = 4096;
int main(int argc, char **argv) {
int status;
int count = 0;
int i;
char *fname = "/mnt/test.mmap";
char *mem;
unlink(fname);
int fd = open(fname, O_CREAT | O_EXCL | O_RDWR, 0600);
status = ftruncate(fd, kMemSize);
mem = mmap(0, kMemSize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
// Fill the memory with 1s.
memset(mem, 1, kMemSize);
sleep(2);
for (i = 0; i < kMemSize; i++) {
int byte_good = mem[i] != 0;
if (!byte_good && ((i % kPageSize) == 0)) {
//printf("%d ", i / kPageSize);
count++;
}
}
munmap(mem, kMemSize);
close(fd);
unlink(fname);
if (count > 0) {
printf("Running %d bad page\n", count);
return 1;
}
return 0;
}
Cc: Ying Han <yinghan@google.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Mingming Cao <cmm@us.ibm.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
SHMEM_MAX_BYTES was derived from the maximum size of its triple-indirect
swap vector, forgetting to take the MAX_LFS_FILESIZE limit into account.
Never mind 256kB pages, even 8kB pages on 32-bit kernels allowed files to
grow slightly bigger than that supposed maximum.
Fix this by using the min of both (at build time not run time). And it
happens that this calculation is good as far as 8MB pages on 32-bit or
16MB pages on 64-bit: though SHMSWP_MAX_INDEX gets truncated before that,
it's truncated to such large numbers that we don't need to care.
[akpm@linux-foundation.org: it needs pagemap.h]
[akpm@linux-foundation.org: fix sparc64 min() warnings]
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Yuri Tikhonov <yur@emcraft.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix a division by zero which we have in shmem_truncate_range() and
shmem_unuse_inode() when using big PAGE_SIZE values (e.g. 256kB on
ppc44x).
With 256kB PAGE_SIZE, the ENTRIES_PER_PAGEPAGE constant becomes too large
(0x1.0000.0000) on a 32-bit kernel, so this patch just changes its type
from 'unsigned long' to 'unsigned long long'.
Hugh: reverted its unsigned long longs in shmem_truncate_range() and
shmem_getpage(): the pagecache index cannot be more than an unsigned long,
so the divisions by zero occurred in unreached code. It's a pity we need
any ULL arithmetic here, but I found no pretty way to avoid it.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Support the Intel 854 Chipset in fbdev.
We test and use the patch on a Thomson IP1101 IPTV-Box. On the VGA-Port
we get a normal signal.
Here is the link to the Mambux-Project: http://www.mambux.de
Cc: Keith Packard <keithp@keithp.com>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Stefan Husemann <shusemann@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jens Axboe