Commit Graph

11027 Commits

Author SHA1 Message Date
Corey Minyard 4d7cbac7c8 [PATCH] IPMI: Fix BT long busy
The IPMI BT subdriver has been patched to survive "long busy" timeouts seen
during firmware upgrades and resets.  The patch never returns the HOSED state,
synthesizes response messages with meaningful completion codes, and recovers
gracefully when the hardware finishes the long busy.  The subdriver now issues
a "Get BT Capabilities" command and properly uses those results.  More
informative completion codes are returned on error from transaction starts;
this logic was propogated to the KCS and SMIC subdrivers.  Finally, indent and
other style quirks were normalized.

Signed-off-by: Rocky Craig <rocky.craig@hp.com>
Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:47 -08:00
Corey Minyard b9675136e2 [PATCH] IPMI: Add maintenance mode
Some commands and operations on a BMC can cause the BMC to "go away" for a
while.  This can cause the automatic flag processing and other things of that
nature to timeout and generate annoying logs, or possibly cause other bad
things to happen when in firmware update mode.

Add detection of those commands (cold reset, warm reset, and any firmware
command) and turns off automatic processing for 30 seconds.  It also add a
manual override either way.

Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:47 -08:00
Corey Minyard 759643b874 [PATCH] IPMI: pass sysfs name from lower level driver
Pass in the sysfs name from the lower-level IPMI driver, as the coming IPMI
serial driver will need that to link properly from the serial device sysfs
directory.

Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:47 -08:00
Paul Clements 6b39bb6548 [PATCH] nbd: show nbd client pid in sysfs
Allow nbd to expose the nbd-client daemon's PID in /sys/block/nbd<x>/pid.

This is helpful for tracking connection status of a device and for
determining which nbd devices are currently in use.

Signed-off-by: Paul Clements <paul.clements@steeleye.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:47 -08:00
Benjamin LaHaise 97d2a80584 [PATCH] aio: remove ki_retried debugging member
Remove the ki_retried member from struct kiocb.  I think the idea was
bounced around a while back, but Arnaldo pointed out another reason that we
should dig it up when he pointed out that the last cacheline of struct
kiocb only contains 4 bytes.  By removing the debugging member, we save
more than the 8 byte on 64 bit machines.

Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Acked-by: Ken Chen <kenneth.w.chen@intel.com>
Acked-by: Zach Brown <zach.brown@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:46 -08:00
Magnus Damm 85916f8166 [PATCH] Kexec / Kdump: Unify elf note code
The elf note saving code is currently duplicated over several
architectures.  This cleanup patch simply adds code to a common file and
then replaces the arch-specific code with calls to the newly added code.

The only drawback with this approach is that s390 doesn't fully support
kexec-on-panic which for that arch leads to introduction of unused code.

Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:46 -08:00
Adrian Bunk 7d1362c0d0 [PATCH] cleanup asm/setup.h userspace visibility
Make the contents of the userspace asm/setup.h header consistent on all
architectures:

 - export setup.h to userspace on all architectures
 - export only COMMAND_LINE_SIZE to userspace
 - frv: move COMMAND_LINE_SIZE from param.h
 - i386: remove duplicate COMMAND_LINE_SIZE from param.h
 - arm:
   - export ATAGs to userspace
   - change u8/u16/u32 to __u8/__u16/__u32

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:46 -08:00
Helge Deller 15ad7cdcfd [PATCH] struct seq_operations and struct file_operations constification
- move some file_operations structs into the .rodata section

 - move static strings from policy_types[] array into the .rodata section

 - fix generic seq_operations usages, so that those structs may be defined
   as "const" as well

[akpm@osdl.org: couple of fixes]
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:46 -08:00
Adrian Bunk 4b358e2206 [PATCH] cleanup include/asm-generic/atomic.h
cleanup asm-generic/atomic.h

 - no longer a userspace header
 - remove the unneeded #include <asm/types.h>
 - #else/#endif comments

[akpm@osdl.org: fix arm build]
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:45 -08:00
Adrian Bunk 219576e127 [PATCH] include/asm-h8300/: "extern inline" -> "static inline"
"extern inline" generates a warning with -Wmissing-prototypes and I'm
currently working on getting the kernel cleaned up for adding this to the
CFLAGS since it will help us to avoid a nasty class of runtime errors.

If there are places that really need a forced inline, __always_inline would be
the correct solution.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:45 -08:00
Adrian Bunk bb8cc64165 [PATCH] include/asm-cris/: "extern inline" -> "static inline"
"extern inline" generates a warning with -Wmissing-prototypes and I'm
currently working on getting the kernel cleaned up for adding this to the
CFLAGS since it will help us to avoid a nasty class of runtime errors.

If there are places that really need a forced inline, __always_inline would be
the correct solution.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:45 -08:00
Robert P. J. Day a0e7688df1 [PATCH] Kbuild: add 3 more header files to get properly "unifdef"ed
Add 3 more files to get "unifdef"ed when creating sanitized headers with
"make headers_install".

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Acked-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: "John W. Linville" <linville@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:44 -08:00
Mariusz Kozlowski 5296c7bec8 [PATCH] fs: reiserfs add missing brackets
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:44 -08:00
Jordan Crouse 65867beb0d [PATCH] Trivial cleanup in the PCI IDs for the CS5535
Rename a poorly worded PCI ID for the Geode GX and CS5535 companion chips.
The graphics processor and host bridge actually live in the northbridge on
the integrated processor, not in the companion chip.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:44 -08:00
Adrian Bunk 0da1480ec3 [PATCH] proper prototype for remove_inode_dquot_ref()
Add a proper prototype for remove_inode_dquot_ref() in
include/linux/quotaops.h

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:44 -08:00
Arnaldo Carvalho de Melo 12d40e43d2 [PATCH] Save some bytes in struct inode
[acme@newtoy net-2.6.20]$ pahole --cacheline 64 fs/inode.o inode
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/linux/dcache.h:86 */
struct inode {
        struct hlist_node          i_hash;               /*     0     8 */
        struct list_head           i_list;               /*     8     8 */
        struct list_head           i_sb_list;            /*    16     8 */
        struct list_head           i_dentry;             /*    24     8 */
        long unsigned int          i_ino;                /*    32     4 */
        atomic_t                   i_count;              /*    36     4 */
        umode_t                    i_mode;               /*    40     2 */

        /* XXX 2 bytes hole, try to pack */

        unsigned int               i_nlink;              /*    44     4 */
        uid_t                      i_uid;                /*    48     4 */
        gid_t                      i_gid;                /*    52     4 */
        dev_t                      i_rdev;               /*    56     4 */
        loff_t                     i_size;               /*    60     8 */
        struct timespec            i_atime;              /*    68     8 */
        struct timespec            i_mtime;              /*    76     8 */
        struct timespec            i_ctime;              /*    84     8 */
        unsigned int               i_blkbits;            /*    92     4 */
        long unsigned int          i_version;            /*    96     4 */
        blkcnt_t                   i_blocks;             /*   100     4 */
        short unsigned int         i_bytes;              /*   104     2 */

        /* XXX 2 bytes hole, try to pack */

        spinlock_t                 i_lock;               /*   108    40 */
        struct mutex               i_mutex;              /*   148    76 */
        struct rw_semaphore        i_alloc_sem;          /*   224    64 */
        struct inode_operations *  i_op;                 /*   288     4 */
        const struct file_operations  * i_fop;           /*   292     4 */
        struct super_block *       i_sb;                 /*   296     4 */
        struct file_lock *         i_flock;              /*   300     4 */
        struct address_space *     i_mapping;            /*   304     4 */
        struct address_space       i_data;               /*   308   188 */
        struct list_head           i_devices;            /*   496     8 */
        union                      ;                     /*   504     4 */
        int                        i_cindex;             /*   508     4 */
        __u32                      i_generation;         /*   512     4 */
        /* ---------- cacheline 8 boundary ---------- */
        long unsigned int          i_dnotify_mask;       /*   516     4 */
        struct dnotify_struct *    i_dnotify;            /*   520     4 */
        struct list_head           inotify_watches;      /*   524     8 */
        struct mutex               inotify_mutex;        /*   532    76 */
        long unsigned int          i_state;              /*   608     4 */
        long unsigned int          dirtied_when;         /*   612     4 */
        unsigned int               i_flags;              /*   616     4 */
        atomic_t                   i_writecount;         /*   620     4 */
        void *                     i_security;           /*   624     4 */
        void *                     i_private;            /*   628     4 */
}; /* size: 632, sum members: 628, holes: 2, sum holes: 4 */

[acme@newtoy net-2.6.20]$

So just moving i_mode to after i_bytes we save 4 bytes by nuking both holes:

[acme@newtoy net-2.6.20]$ codiff -V /tmp/inode.o.before fs/inode.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/fs/inode.c:
  struct inode |   -4
    i_mode;
     from: umode_t               /*    40(0)     2(0) */
     to:   umode_t               /*   102(0)     2(0) */
 1 struct changed
[acme@newtoy net-2.6.20]$

I've prunned all the other offset changes, only this one is of interest here.

So now we have:

[acme@newtoy net-2.6.20]$ pahole --cacheline 64 ../OUTPUT/qemu/net-2.6.20/fs/inode.o inode
/* /pub/scm/linux/kernel/git/acme/net-2.6.20/include/linux/dcache.h:86 */
struct inode {
        struct hlist_node          i_hash;               /*     0     8 */
        struct list_head           i_list;               /*     8     8 */
        struct list_head           i_sb_list;            /*    16     8 */
        struct list_head           i_dentry;             /*    24     8 */
        long unsigned int          i_ino;                /*    32     4 */
        atomic_t                   i_count;              /*    36     4 */
        unsigned int               i_nlink;              /*    40     4 */
        uid_t                      i_uid;                /*    44     4 */
        gid_t                      i_gid;                /*    48     4 */
        dev_t                      i_rdev;               /*    52     4 */
        loff_t                     i_size;               /*    56     8 */
        /* ---------- cacheline 1 boundary ---------- */
        struct timespec            i_atime;              /*    64     8 */
        struct timespec            i_mtime;              /*    72     8 */
        struct timespec            i_ctime;              /*    80     8 */
        unsigned int               i_blkbits;            /*    88     4 */
        long unsigned int          i_version;            /*    92     4 */
        blkcnt_t                   i_blocks;             /*    96     4 */
        short unsigned int         i_bytes;              /*   100     2 */
        umode_t                    i_mode;               /*   102     2 */
        spinlock_t                 i_lock;               /*   104    40 */
        struct mutex               i_mutex;              /*   144    76 */
        struct rw_semaphore        i_alloc_sem;          /*   220    64 */
        struct inode_operations *  i_op;                 /*   284     4 */
        const struct file_operations  * i_fop;           /*   288     4 */
        struct super_block *       i_sb;                 /*   292     4 */
        struct file_lock *         i_flock;              /*   296     4 */
        struct address_space *     i_mapping;            /*   300     4 */
        struct address_space       i_data;               /*   304   188 */
        struct list_head           i_devices;            /*   492     8 */
        union                      ;                     /*   500     4 */
        int                        i_cindex;             /*   504     4 */
        __u32                      i_generation;         /*   508     4 */
        /* ---------- cacheline 8 boundary ---------- */
        long unsigned int          i_dnotify_mask;       /*   512     4 */
        struct dnotify_struct *    i_dnotify;            /*   516     4 */
        struct list_head           inotify_watches;      /*   520     8 */
        struct mutex               inotify_mutex;        /*   528    76 */
        long unsigned int          i_state;              /*   604     4 */
        long unsigned int          dirtied_when;         /*   608     4 */
        unsigned int               i_flags;              /*   612     4 */
        atomic_t                   i_writecount;         /*   616     4 */
        void *                     i_security;           /*   620     4 */
        void *                     i_private;            /*   624     4 */
}; /* size: 628 */

[acme@newtoy net-2.6.20]$

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:43 -08:00
Ingo Molnar 2ee91f197c [PATCH] lockdep: show more details about self-test failures
Make the locking self-test failures (of 'FAILURE' type) easier to debug by
printing more information.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:43 -08:00
Stephane Eranian 0b71c8e76d [PATCH] remove useless carta_random32.h
Remove the carta_random32.h header file.  The carta_random32() function was
was put in and removed in favor of random32().  In the removal process, the
header file was forgotten.

Signed-off-by: Stephane Eranian <eranian@hpl.hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:42 -08:00
Gautham R Shenoy f7dff2b126 [PATCH] Handle per-subsystem mutexes for CONFIG_HOTPLUG_CPU not set
Provide a common interface for all the subsystems to lock and unlock their
per-subsystem hotcpu mutexes.

When CONFIG_HOTPLUG_CPU is not set, these operations would be no-ops.

[akpm@osdl.org: macros -> inlines]
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:41 -08:00
Ralf Baechle d3fa72e455 [PATCH] Pass struct dev pointer to dma_cache_sync()
Pass struct dev pointer to dma_cache_sync()

dma_cache_sync() is ill-designed in that it does not have a struct device
pointer argument which makes proper support for systems that consist of a
mix of coherent and non-coherent DMA devices hard.  Change dma_cache_sync
to take a struct device pointer as first argument and fix all its callers
to pass it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:41 -08:00
Ralf Baechle f67637ee4b [PATCH] Add struct dev pointer to dma_is_consistent()
dma_is_consistent() is ill-designed in that it does not have a struct
device pointer argument which makes proper support for systems that consist
of a mix of coherent and non-coherent DMA devices hard.  Change
dma_is_consistent to take a struct device pointer as first argument and fix
the sole caller to pass it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:41 -08:00
Eric Dumazet 83b7b44e1c [PATCH] fs: reorder some 'struct inode' fields to speedup i_size manipulations
On 32bits SMP platforms, 64bits i_size is protected by a seqcount
(i_size_seqcount).

When i_size is read or written, i_size_seqcount is read/written as well, so
it make sense to group these two fields together in the same cache line.

This patch moves i_size_seqcount next to i_size, and also moves i_version
to let offsetof(struct inode, i_size) being 0x40 instead of 0x3c (for
32bits platforms).

For 64 bits platforms, i_size_seqcount doesnt exist, and the move of a
'long i_version' should not introduce a new hole because of padding.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:41 -08:00
Randy Dunlap d9489fb606 [PATCH] kernel-doc: fix fusion and i2o docs
Correct lots of typos, kernel-doc warnings, & kernel-doc usage in fusion and
i2o drivers.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:40 -08:00
Adrian Bunk c585646dd1 [PATCH] fs/lockd/host.c: make 2 functions static
Make the following needlessly global functions static:

 - nlm_lookup_host()
 - nsm_find()

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:40 -08:00
Adrian Bunk 7ddae86095 [PATCH] make fs/jbd2/transaction.c:__kbd2_journal_temp_unlink_buffer() static
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:40 -08:00
Adrian Bunk d394e122bc [PATCH] make fs/jbd/transaction.c:__journal_temp_unlink_buffer() static
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:40 -08:00
Adrian Bunk d3228a887c [PATCH] make kernel/signal.c:kill_proc_info() static
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:39 -08:00
Adrian Bunk ebe7e5fe4b [PATCH] remove kernel/lockdep.c:lockdep_internal
Remove the no longer used lockdep_internal().

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:39 -08:00
Ingo Molnar 0231606785 [PATCH] hotplug CPU: clean up hotcpu_notifier() use
There was lots of #ifdef noise in the kernel due to hotcpu_notifier(fn,
prio) not correctly marking 'fn' as used in the !HOTPLUG_CPU case, and thus
generating compiler warnings of unused symbols, hence forcing people to add
#ifdefs.

the compiler can skip truly unused functions just fine:

    text    data     bss     dec     hex filename
 1624412  728710 3674856 6027978  5bfaca vmlinux.before
 1624412  728710 3674856 6027978  5bfaca vmlinux.after

[akpm@osdl.org: topology.c fix]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:39 -08:00
Randy Dunlap 83df8db9e6 [PATCH] declare smp_call_function_single in generic code
smp_call_function_single() needs to be visible in non-SMP builds, to fix:

arch/x86_64/kernel/vsyscall.c:283: warning: implicit declaration of function 'smp_call_function_single'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:38 -08:00
Masami Hiramatsu b4c6c34a53 [PATCH] kprobes: enable booster on the preemptible kernel
When we are unregistering a kprobe-booster, we can't release its
instruction buffer immediately on the preemptive kernel, because some
processes might be preempted on the buffer.  The freeze_processes() and
thaw_processes() functions can clean most of processes up from the buffer.
There are still some non-frozen threads who have the PF_NOFREEZE flag.  If
those threads are sleeping (not preempted) at the known place outside the
buffer, we can ensure safety of freeing.

However, the processing of this check routine takes a long time.  So, this
patch introduces the garbage collection mechanism of insn_slot.  It also
introduces the "dirty" flag to free_insn_slot because of efficiency.

The "clean" instruction slots (dirty flag is cleared) are released
immediately.  But the "dirty" slots which are used by boosted kprobes, are
marked as garbages.  collect_garbage_slots() will be invoked to release
"dirty" slots if there are more than INSNS_PER_PAGE garbage slots or if
there are no unused slots.

Cc: "Keshavamurthy, Anil S" <anil.s.keshavamurthy@intel.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: "bibo,mao" <bibo.mao@intel.com>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Yumiko Sugita <yumiko.sugita.yf@hitachi.com>
Cc: Satoshi Oshima <soshima@redhat.com>
Cc: Hideo Aoki <haoki@redhat.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:38 -08:00
Magnus Damm 386d9a7edd [PATCH] elf: Always define elf_addr_t in linux/elf.h
Define elf_addr_t in linux/elf.h.  The size of the type is determined using
ELF_CLASS.  This allows us to remove the defines that today are spread all
over .c and .h files.

Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Cc: Daniel Jacobowitz <drow@false.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Jakub Jelinek <jakub@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:38 -08:00
suzuki 651971cb72 [PATCH] Fix the size limit of compat space msgsize
Currently we allocate 64k space on the user stack and use it the msgbuf for
sys_{msgrcv,msgsnd} for compat and the results are later copied in user [
by copy_in_user].  This patch introduces helper routines for
sys_{msgrcv,msgsnd} as below:

do_msgsnd() : Accepts the mtype and user space ptr to the buffer along with
the msqid and msgflg.

do_msgrcv() : Accepts a kernel space ptr to mtype and a userspace ptr to
the buffer.  The mtype has to be copied back the user space msgbuf by the
caller.

These changes avoid the need to allocate the msgsize on the userspace (
thus removing the size limt ) and the overhead of an extra copy_in_user().

Signed-off-by: Suzuki K P <suzuki@in.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:38 -08:00
Thomas Gleixner cfd1893477 [PATCH] ktime: Fix signed / unsigned mismatch in ktime_to_ns
The 32 bit implementation of ktime_to_ns returns unsigned value, while the
64 bit version correctly returns an signed value.  There is no current user
affected by this, but it has to be fixed, as ktime values can be negative.

Pointed-out-by: Helmut Duregger <Helmut.Duregger@student.uibk.ac.at>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:37 -08:00
Andrew Morton 0490366432 [PATCH] remove HASH_HIGHMEM
It has no users and it's doubtful that we'll need it again.

Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:37 -08:00
Arnd Bergmann f5738ceed4 [PATCH] remove kernel syscalls
The last thing we agreed on was to remove the macros entirely for 2.6.19,
on all architectures. Unfortunately, I think nobody actually _did_ that,
so they are still there.

[akpm@osdl.org: x86_64 fix]
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg Schafer <gschafer@zip.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:37 -08:00
Peter Zijlstra d5abe66917 [PATCH] debug: workqueue locking sanity
Workqueue functions should not leak locks, assert so, printing the
last function ran.

Use macros in lockdep.h to avoid include dependency pains.

[akpm@osdl.org: build fix]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:36 -08:00
Ingo Molnar ece8a684c7 [PATCH] sleep profiling
Implement prof=sleep profiling.  TASK_UNINTERRUPTIBLE sleeps will be taken
as a profile hit, and every millisecond spent sleeping causes a profile-hit
for the call site that initiated the sleep.

Sample readprofile output on i386:

   306 ps2_sendbyte                               1.3973
   432 call_usermodehelper_keys                   1.9548
   484 ps2_command                                0.6453
   790 __driver_attach                            4.7879
  1593 msleep                                    44.2500
  3976 sync_buffer                               64.1290
  4076 do_lookup                                 12.4648
  8587 sync_page                                122.6714
 20820 total                                      0.0067

(NOTE: architectures need to check whether get_wchan() can be called from
deep within the wakeup path.)

akpm: we need to mark more functions __sched.  lock_sock(), msleep(), others..

akpm: the contention in do_lookup() is a surprise.  Presumably doing disk
reads for directory contents while holding i_mutex.

[akpm@osdl.org: various fixes]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:36 -08:00
Peter Zijlstra 6cfd76a26d [PATCH] lockdep: name some old style locks
Name some of the remaning 'old_style_spin_init' locks

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:36 -08:00
Andrew Morton 8984d137df [PATCH] ext4: uninline large functions
Saves nearly 4kbytes on x86.

Cc: Arnaldo Carvalho de Melo <acme@mandriva.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:35 -08:00
Andrew Morton 3a229b39eb [PATCH] ext3: uninline large functions
Saves nearly 4kbytes on x86.

Cc: Arnaldo Carvalho de Melo <acme@mandriva.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:35 -08:00
Paul B Schroeder e0980dafa3 [PATCH] Exar quad port serial
This is on our "Envoy" boxes which we have, according to the documentation, an
"Exar ST16C554/554D Quad UART with 16-byte Fifo's".  The box also has two
other "on-board" serial ports and a modem chip.

The two on-board serial UARTs were being detected along with the first two
Exar UARTs.  The last two Exar UARTs were not showing up and neither was the
modem.

This patch was the only way I could the kernel to see beyond the standard four
serial ports and get all four of the Exar UARTs to show up.

[akpm@osdl.org: build fix]
Signed-off-by:  Paul B Schroeder <pschroeder@uplogix.com>
Cc: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:35 -08:00
Alexey Dobriyan 9774a1f54f [PATCH] Compile-time check re world-writeable module params
One of the mistakes a module_param() user can make is to supply default
value of module parameter as the last argument.  module_param() accepts
permissions instead.  If default value is, say, 3 (-------wx), parameter
becomes world-writeable.

So far, the only remedy was to apply grep(1) and read drivers submitted
to -mm. BTDT.

With this patch applied, compiler will finally do some job.

*) bounds checking on permissions
*) world-writeable bit checking on permissions
*) compile breakage if checks trigger

First version of this check (only "& 2" part) directly caught 4 out of 7
places during my last grep.

    Subject: Neverending module_param() bugs
    [X] drivers/acpi/sbs.c:101:module_param(capacity_mode, int, CAPACITY_UNIT);
    [X] drivers/acpi/sbs.c:102:module_param(update_mode, int, UPDATE_MODE);
    [ ] drivers/acpi/sbs.c:103:module_param(update_info_mode, int, UPDATE_INFO_MODE);
    [ ] drivers/acpi/sbs.c:104:module_param(update_time, int, UPDATE_TIME);
    [ ] drivers/acpi/sbs.c:105:module_param(update_time2, int, UPDATE_TIME2);
    [X] drivers/char/watchdog/sbc8360.c:203:module_param(timeout, int, 27);
    [X] drivers/media/video/tuner-simple.c:13:module_param(offset, int, 0666);

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:34 -08:00
Oleg Nesterov 34ec12349c [PATCH] taskstats: cleanup ->signal->stats allocation
Allocate ->signal->stats on demand in taskstats_exit(), this allows us to
remove taskstats_tgid_alloc() (the last non-trivial inline) from taskstat's
public interface.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:34 -08:00
Oleg Nesterov 115085ea07 [PATCH] taskstats: cleanup do_exit() path
do_exit:
	taskstats_exit_alloc()
	...
	taskstats_exit_send()
	taskstats_exit_free()

I think this is not good, let it be a single function exported to the core
kernel, taskstats_exit(), which does alloc + send + free itself.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:34 -08:00
Andrew Morton 20aa7b21b1 [PATCH] probe_kernel_address() needs to do set_fs()
probe_kernel_address() purports to be generic, only it forgot to select
KERNEL_DS, so it presently won't work right on all architectures.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:34 -08:00
Ryan Underwood c140e11001 [PATCH] parport_pc: Add support for OX16PCI952 parallel port
Add support for the parallel port (implemented as separate PCI function) on
the Oxford Semiconductor OX16PCI952.

Signed-off-by: Ryan Underwood <nemesis@icequake.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:34 -08:00
Jan Engelhardt 5ec68b2e31 [PATCH] pull in necessary header files for cdev.h
linux/cdev.h uses struct kobject and other structs and should therefore
include them.  Currently, a module either needs to add the missing includes
itself, or, in case a module includes other headers already, needs to put
<linux/cdev.h> last, which goes against a alphabetically-sorted include
list.

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:32 -08:00
Ingo Molnar e59e2ae2c2 [PATCH] SysRq-X: show blocked tasks
Add SysRq-X support: show blocked (TASK_UNINTERRUPTIBLE) tasks only.

Useful for debugging IO stalls.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:32 -08:00
Miklos Szeredi 0ec7ca41f6 [PATCH] fuse: add DESTROY operation
Add a DESTROY operation for block device based filesystems.  With the help of
this operation, such a filesystem can flush dirty data to the device
synchronously before the umount returns.

This is needed in situations where the filesystem is assumed to be clean
immediately after unmount (e.g.  ejecting removable media).

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:32 -08:00
Miklos Szeredi b2d2272fae [PATCH] fuse: add bmap support
Add support for the BMAP operation for block device based filesystems.  This
is needed to support swap-files and lilo.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:32 -08:00
Miklos Szeredi e9168c189f [PATCH] fuse: update userspace interface to version 7.8
Add a flag to the RELEASE message which specifies that a FLUSH operation
should be performed as well.  This interface update is needed for the FreeBSD
port, and doesn't actually touch the Linux implementation at all.

Also rename the unused 'flush_flags' in the FLUSH message to 'unused'.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:31 -08:00
Jan Engelhardt 48ed214d10 [PATCH] constify inode accessors
Change the signature of i_size_read(), IMINOR() and IMAJOR() because they,
or the functions they call, will never modify the argument.

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:31 -08:00
Peter Zijlstra ed07536ed6 [PATCH] lockdep: annotate nfs/nfsd in-kernel sockets
Stick NFS sockets in their own class to avoid some lockdep warnings.  NFS
sockets are never exposed to user-space, and will hence not trigger certain
code paths that would otherwise pose deadlock scenarios.

[akpm@osdl.org: cleanups]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Steven Dickson <SteveD@redhat.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Acked-by: Neil Brown <neilb@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
[ Fixed patch corruption by quilt, pointed out by Peter Zijlstra ]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:30 -08:00
Peter Korsgaard 238b8721a5 [PATCH] serial uartlite driver
Add a driver for the Xilinx uartlite serial controller used in boards with
the PPC405 core in the Xilinx V2P/V4 fpgas.

The hardware is very simple (baudrate/start/stopbits fixed and no break
support).  See the datasheet for details:

	http://www.xilinx.com/bvdocs/ipcenter/data_sheet/opb_uartlite.pdf

See http://thread.gmane.org/gmane.linux.serial/1237/ for the email thread.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Olof Johansson <olof@lixom.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:30 -08:00
Mike Miller 799202cbd0 [PATCH] cciss: add support for 1024 logical volumes
Add the support for a large number of logical volumes.  We will soon have
hardware that support up to 1024 logical volumes.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:30 -08:00
Adrian Bunk eef88d16a2 [PATCH] fix v850 compilation
More fallout of the post 2.6.19-rc1 IRQ changes...

      CC      init/main.o
    In file included from
    /home/bunk/linux/kernel-2.6/linux-2.6.19-rc6-mm2/include/linux/rtc.h:102,
                     from
    /home/bunk/linux/kernel-2.6/linux-2.6.19-rc6-mm2/include/linux/efi.h:19,
                     from
    /home/bunk/linux/kernel-2.6/linux-2.6.19-rc6-mm2/init/main.c:43:
    /home/bunk/linux/kernel-2.6/linux-2.6.19-rc6-mm2/include/linux/interrupt.h:67:
    error: conflicting types for 'irq_handler_t'
    include2/asm/irq.h:49: error: previous declaration of 'irq_handler_t' was here

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:29 -08:00
Rafael J. Wysocki 341a595850 [PATCH] Support for freezeable workqueues
Make it possible to create a workqueue the worker thread of which will be
frozen during suspend, along with other kernel threads.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@suspend2.net>
Cc: David Chinner <dgc@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:29 -08:00
Rafael J. Wysocki a9b6f562f1 [PATCH] swsusp: Untangle thaw_processes
Move the loop from thaw_processes() to a separate function and call it
independently for kernel threads and user space processes so that the order
of thawing tasks is clearly visible.

Drop thaw_kernel_threads() which is never used.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@suspend2.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:28 -08:00
Rafael J. Wysocki 2d4a34c936 [PATCH] swsusp: Support i386 systems with PAE or without PSE
Make swsusp support i386 systems with PAE or without PSE.

This is done by creating temporary page tables located in resume-safe page
frames before the suspend image is restored in the same way as x86_64 does
it.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Andi Kleen <ak@suse.de>
Cc: Dave Jones <davej@redhat.com>
Cc: Nigel Cunningham <ncunningham@linuxmail.org>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:28 -08:00
Nigel Cunningham ff39593ad0 [PATCH] swsusp: thaw userspace and kernel space separately
Modify process thawing so that we can thaw kernel space without thawing
userspace, and thaw kernelspace first.  This will be useful in later
patches, where I intend to get swsusp thawing kernel threads only before
seeking to free memory.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:28 -08:00
Nigel Cunningham 7dfb71030f [PATCH] Add include/linux/freezer.h and move definitions from sched.h
Move process freezing functions from include/linux/sched.h to freezer.h, so
that modifications to the freezer or the kernel configuration don't require
recompiling just about everything.

[akpm@osdl.org: fix ueagle driver]
Signed-off-by: Nigel Cunningham <nigel@suspend2.net>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:27 -08:00
Rafael J. Wysocki 8357376d3d [PATCH] swsusp: Improve handling of highmem
Currently swsusp saves the contents of highmem pages by copying them to the
normal zone which is quite inefficient (eg.  it requires two normal pages
to be used for saving one highmem page).  This may be improved by using
highmem for saving the contents of saveable highmem pages.

Namely, during the suspend phase of the suspend-resume cycle we try to
allocate as many free highmem pages as there are saveable highmem pages.
If there are not enough highmem image pages to store the contents of all of
the saveable highmem pages, some of them will be stored in the "normal"
memory.  Next, we allocate as many free "normal" pages as needed to store
the (remaining) image data.  We use a memory bitmap to mark the allocated
free pages (ie.  highmem as well as "normal" image pages).

Now, we use another memory bitmap to mark all of the saveable pages
(highmem as well as "normal") and the contents of the saveable pages are
copied into the image pages.  Then, the second bitmap is used to save the
pfns corresponding to the saveable pages and the first one is used to save
their data.

During the resume phase the pfns of the pages that were saveable during the
suspend are loaded from the image and used to mark the "unsafe" page
frames.  Next, we try to allocate as many free highmem page frames as to
load all of the image data that had been in the highmem before the suspend
and we allocate so many free "normal" page frames that the total number of
allocated free pages (highmem and "normal") is equal to the size of the
image.  While doing this we have to make sure that there will be some extra
free "normal" and "safe" page frames for two lists of PBEs constructed
later.

Now, the image data are loaded, if possible, into their "original" page
frames.  The image data that cannot be written into their "original" page
frames are loaded into "safe" page frames and their "original" kernel
virtual addresses, as well as the addresses of the "safe" pages containing
their copies, are stored in one of two lists of PBEs.

One list of PBEs is for the copies of "normal" suspend pages (ie.  "normal"
pages that were saveable during the suspend) and it is used in the same way
as previously (ie.  by the architecture-dependent parts of swsusp).  The
other list of PBEs is for the copies of highmem suspend pages.  The pages
in this list are restored (in a reversible way) right before the
arch-dependent code is called.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:27 -08:00
Rafael J. Wysocki 3aef83e0ef [PATCH] swsusp: use block device offsets to identify swap locations
Make swsusp use block device offsets instead of swap offsets to identify swap
locations and make it use the same code paths for writing as well as for
reading data.

This allows us to use the same code for handling swap files and swap
partitions and to simplify the code, eg.  by dropping rw_swap_page_sync().

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:27 -08:00
Rafael J. Wysocki 915bae9ebe [PATCH] swsusp: use partition device and offset to identify swap areas
The Linux kernel handles swap files almost in the same way as it handles swap
partitions and there are only two differences between these two types of swap
areas:

(1) swap files need not be contiguous,

(2) the header of a swap file is not in the first block of the partition
    that holds it.  From the swsusp's point of view (1) is not a problem,
    because it is already taken care of by the swap-handling code, but (2) has
    to be taken into consideration.

In principle the location of a swap file's header may be determined with the
help of appropriate filesystem driver.  Unfortunately, however, it requires
the filesystem holding the swap file to be mounted, and if this filesystem is
journaled, it cannot be mounted during a resume from disk.  For this reason we
need some other means by which swap areas can be identified.

For example, to identify a swap area we can use the partition that holds the
area and the offset from the beginning of this partition at which the swap
header is located.

The following patch allows swsusp to identify swap areas this way.  It changes
swap_type_of() so that it takes an additional argument representing an offset
of the swap header within the partition represented by its first argument.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:27 -08:00
Nick Piggin 7cf9c2c76c [PATCH] radix-tree: RCU lockless readside
Make radix tree lookups safe to be performed without locks.  Readers are
protected against nodes being deleted by using RCU based freeing.  Readers
are protected against new node insertion by using memory barriers to ensure
the node itself will be properly written before it is visible in the radix
tree.

Each radix tree node keeps a record of their height (above leaf nodes).
This height does not change after insertion -- when the radix tree is
extended, higher nodes are only inserted in the top.  So a lookup can take
the pointer to what is *now* the root node, and traverse down it even if
the tree is concurrently extended and this node becomes a subtree of a new
root.

"Direct" pointers (tree height of 0, where root->rnode points directly to
the data item) are handled by using the low bit of the pointer to signal
whether rnode is a direct pointer or a pointer to a radix tree node.

When a reader wants to traverse the next branch, they will take a copy of
the pointer.  This pointer will be either NULL (and the branch is empty) or
non-NULL (and will point to a valid node).

[akpm@osdl.org: cleanups]
[Lee.Schermerhorn@hp.com: bugfixes, comments, simplifications]
[clameter@sgi.com: build fix]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:25 -08:00
Arnaldo Carvalho de Melo 36de643786 [PATCH] Save some bytes in struct mm_struct
Before:
[acme@newtoy net-2.6.20]$ pahole --cacheline 32 kernel/sched.o mm_struct

/* include2/asm/processor.h:542 */
struct mm_struct {
        struct vm_area_struct *    mmap;                 /*     0     4 */
        struct rb_root             mm_rb;                /*     4     4 */
        struct vm_area_struct *    mmap_cache;           /*     8     4 */
        long unsigned int          (*get_unmapped_area)(); /*    12     4 */
        void                       (*unmap_area)();      /*    16     4 */
        long unsigned int          mmap_base;            /*    20     4 */
        long unsigned int          task_size;            /*    24     4 */
        long unsigned int          cached_hole_size;     /*    28     4 */
        /* ---------- cacheline 1 boundary ---------- */
        long unsigned int          free_area_cache;      /*    32     4 */
        pgd_t *                    pgd;                  /*    36     4 */
        atomic_t                   mm_users;             /*    40     4 */
        atomic_t                   mm_count;             /*    44     4 */
        int                        map_count;            /*    48     4 */
        struct rw_semaphore        mmap_sem;             /*    52    64 */
        spinlock_t                 page_table_lock;      /*   116    40 */
        struct list_head           mmlist;               /*   156     8 */
        mm_counter_t               _file_rss;            /*   164     4 */
        mm_counter_t               _anon_rss;            /*   168     4 */
        long unsigned int          hiwater_rss;          /*   172     4 */
        long unsigned int          hiwater_vm;           /*   176     4 */
        long unsigned int          total_vm;             /*   180     4 */
        long unsigned int          locked_vm;            /*   184     4 */
        long unsigned int          shared_vm;            /*   188     4 */
        /* ---------- cacheline 6 boundary ---------- */
        long unsigned int          exec_vm;              /*   192     4 */
        long unsigned int          stack_vm;             /*   196     4 */
        long unsigned int          reserved_vm;          /*   200     4 */
        long unsigned int          def_flags;            /*   204     4 */
        long unsigned int          nr_ptes;              /*   208     4 */
        long unsigned int          start_code;           /*   212     4 */
        long unsigned int          end_code;             /*   216     4 */
        long unsigned int          start_data;           /*   220     4 */
        /* ---------- cacheline 7 boundary ---------- */
        long unsigned int          end_data;             /*   224     4 */
        long unsigned int          start_brk;            /*   228     4 */
        long unsigned int          brk;                  /*   232     4 */
        long unsigned int          start_stack;          /*   236     4 */
        long unsigned int          arg_start;            /*   240     4 */
        long unsigned int          arg_end;              /*   244     4 */
        long unsigned int          env_start;            /*   248     4 */
        long unsigned int          env_end;              /*   252     4 */
        /* ---------- cacheline 8 boundary ---------- */
        long unsigned int          saved_auxv[44];       /*   256   176 */
        unsigned int               dumpable:2;           /*   432     4 */
        cpumask_t                  cpu_vm_mask;          /*   436     4 */
        mm_context_t               context;              /*   440    68 */
        long unsigned int          swap_token_time;      /*   508     4 */
        /* ---------- cacheline 16 boundary ---------- */
        char                       recent_pagein;        /*   512     1 */

        /* XXX 3 bytes hole, try to pack */

        int                        core_waiters;         /*   516     4 */
        struct completion *        core_startup_done;    /*   520     4 */
        struct completion          core_done;            /*   524    52 */
        rwlock_t                   ioctx_list_lock;      /*   576    36 */
        struct kioctx *            ioctx_list;           /*   612     4 */
}; /* size: 616, sum members: 613, holes: 1, sum holes: 3, cachelines: 20,
      last cacheline: 8 bytes */

After:

[acme@newtoy net-2.6.20]$ pahole --cacheline 32 kernel/sched.o mm_struct
/* include2/asm/processor.h:542 */
struct mm_struct {
        struct vm_area_struct *    mmap;                 /*     0     4 */
        struct rb_root             mm_rb;                /*     4     4 */
        struct vm_area_struct *    mmap_cache;           /*     8     4 */
        long unsigned int          (*get_unmapped_area)(); /*    12     4 */
        void                       (*unmap_area)();      /*    16     4 */
        long unsigned int          mmap_base;            /*    20     4 */
        long unsigned int          task_size;            /*    24     4 */
        long unsigned int          cached_hole_size;     /*    28     4 */
        /* ---------- cacheline 1 boundary ---------- */
        long unsigned int          free_area_cache;      /*    32     4 */
        pgd_t *                    pgd;                  /*    36     4 */
        atomic_t                   mm_users;             /*    40     4 */
        atomic_t                   mm_count;             /*    44     4 */
        int                        map_count;            /*    48     4 */
        struct rw_semaphore        mmap_sem;             /*    52    64 */
        spinlock_t                 page_table_lock;      /*   116    40 */
        struct list_head           mmlist;               /*   156     8 */
        mm_counter_t               _file_rss;            /*   164     4 */
        mm_counter_t               _anon_rss;            /*   168     4 */
        long unsigned int          hiwater_rss;          /*   172     4 */
        long unsigned int          hiwater_vm;           /*   176     4 */
        long unsigned int          total_vm;             /*   180     4 */
        long unsigned int          locked_vm;            /*   184     4 */
        long unsigned int          shared_vm;            /*   188     4 */
        /* ---------- cacheline 6 boundary ---------- */
        long unsigned int          exec_vm;              /*   192     4 */
        long unsigned int          stack_vm;             /*   196     4 */
        long unsigned int          reserved_vm;          /*   200     4 */
        long unsigned int          def_flags;            /*   204     4 */
        long unsigned int          nr_ptes;              /*   208     4 */
        long unsigned int          start_code;           /*   212     4 */
        long unsigned int          end_code;             /*   216     4 */
        long unsigned int          start_data;           /*   220     4 */
        /* ---------- cacheline 7 boundary ---------- */
        long unsigned int          end_data;             /*   224     4 */
        long unsigned int          start_brk;            /*   228     4 */
        long unsigned int          brk;                  /*   232     4 */
        long unsigned int          start_stack;          /*   236     4 */
        long unsigned int          arg_start;            /*   240     4 */
        long unsigned int          arg_end;              /*   244     4 */
        long unsigned int          env_start;            /*   248     4 */
        long unsigned int          env_end;              /*   252     4 */
        /* ---------- cacheline 8 boundary ---------- */
        long unsigned int          saved_auxv[44];       /*   256   176 */
        cpumask_t                  cpu_vm_mask;          /*   432     4 */
        mm_context_t               context;              /*   436    68 */
        long unsigned int          swap_token_time;      /*   504     4 */
        char                       recent_pagein;        /*   508     1 */
        unsigned char              dumpable:2;           /*   509     1 */

        /* XXX 2 bytes hole, try to pack */

        int                        core_waiters;         /*   512     4 */
        struct completion *        core_startup_done;    /*   516     4 */
        struct completion          core_done;            /*   520    52 */
        rwlock_t                   ioctx_list_lock;      /*   572    36 */
        struct kioctx *            ioctx_list;           /*   608     4 */
}; /* size: 612, sum members: 610, holes: 1, sum holes: 2, cachelines: 20,
      last cacheline: 4 bytes */

[acme@newtoy net-2.6.20]$ codiff -V /tmp/sched.o.before kernel/sched.o
/pub/scm/linux/kernel/git/acme/net-2.6.20/kernel/sched.c:
  struct mm_struct |   -4
    dumpable:2;
     from: unsigned int          /*   432(30)    4(2) */
     to:   unsigned char         /*   509(6)     1(2) */
< SNIP other offset changes >
 1 struct changed
[acme@newtoy net-2.6.20]$

I'm not aware of any problem about using 2 byte wide bitfields where
previously a 4 byte wide one was, holler if there is any, I wouldn't be
surprised, bitfields are things from hell.

For the curious, 432(30) means: at offset 432 from the struct start, at
offset 30 in the bitfield (yeah, it comes backwards, hellish, huh?) ditto
for 509(6), while 4(2) and 1(2) means "struct field size(bitfield size)".

Now we have a 2 bytes hole and are using only 4 bytes of the last 32
bytes cacheline, any takers? :-)

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:25 -08:00
Andy Whitcroft 33f2ef89f8 [PATCH] mm: make compound page destructor handling explicit
Currently we we use the lru head link of the second page of a compound page
to hold its destructor.  This was ok when it was purely an internal
implmentation detail.  However, hugetlbfs overrides this destructor
violating the layering.  Abstract this out as explicit calls, also
introduce a type for the callback function allowing them to be type
checked.  For each callback we pre-declare the function, causing a type
error on definition rather than on use elsewhere.

[akpm@osdl.org: cleanups]
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:25 -08:00
Andrew Morton 1b1cec4bbc [PATCH] slab: deprecate kmem_cache_t
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:25 -08:00
Christoph Lameter e18b890bb0 [PATCH] slab: remove kmem_cache_t
Replace all uses of kmem_cache_t with struct kmem_cache.

The patch was generated using the following script:

	#!/bin/sh
	#
	# Replace one string by another in all the kernel sources.
	#

	set -e

	for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do
		quilt add $file
		sed -e "1,\$s/$1/$2/g" $file >/tmp/$$
		mv /tmp/$$ $file
		quilt refresh
	done

The script was run like this

	sh replace kmem_cache_t "struct kmem_cache"

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:25 -08:00
Christoph Lameter 441e143e95 [PATCH] slab: remove SLAB_DMA
SLAB_DMA is an alias of GFP_DMA. This is the last one so we
remove the leftover comment too.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:24 -08:00
Christoph Lameter e94b176609 [PATCH] slab: remove SLAB_KERNEL
SLAB_KERNEL is an alias of GFP_KERNEL.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:24 -08:00
Christoph Lameter 54e6ecb239 [PATCH] slab: remove SLAB_ATOMIC
SLAB_ATOMIC is an alias of GFP_ATOMIC

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:24 -08:00
Christoph Lameter f7267c0c07 [PATCH] slab: remove SLAB_USER
SLAB_USER is an alias of GFP_USER

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:24 -08:00
Christoph Lameter e6b4f8da3a [PATCH] slab: remove SLAB_NOFS
SLAB_NOFS is an alias of GFP_NOFS.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Christoph Lameter 55acbda096 [PATCH] slab: remove SLAB_NOIO
SLAB_NOIO is an alias of GFP_NOIO with a single instance of use.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Christoph Lameter a06d72c1dc [PATCH] slab: remove SLAB_LEVEL_MASK
SLAB_LEVEL_MASK is only used internally to the slab and is
and alias of GFP_LEVEL_MASK.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Christoph Lameter 6e0eaa4b05 [PATCH] slab: remove SLAB_NO_GROW
It is only used internally in the slab.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Andy Whitcroft 4af2bfc120 [PATCH] silence unused pgdat warning from alloc_bootmem_node and friends
x86 NUMA systems only define bootmem for node 0.  alloc_bootmem_node() and
friends therefore ignore the passed pgdat and use NODE_DATA(0) in all
cases.  This leads to the following warnings as we are not using the passed
parameter:

  .../mm/page_alloc.c: In function 'zone_wait_table_init':
  .../mm/page_alloc.c:2259: warning: unused variable 'pgdat'

One option would be to define all variables used with these macros
__attribute__ ((unused)), but this would leave us exposed should these
become genuinely unused.

The key here is that we _are_ using the value, we ignore it but that is a
deliberate action.  This patch adds a nested local variable within the
alloc_bootmem_node helper to which the pgdat parameter is assigned making
it 'used'.  The nested local is marked __attribute__ ((unused)) to silence
this same warning for it.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Andy Whitcroft 25ba77c141 [PATCH] numa node ids are int, page_to_nid and zone_to_nid should return int
NUMA node ids are passed as either int or unsigned int almost exclusivly
page_to_nid and zone_to_nid both return unsigned long.  This is a throw
back to when page_to_nid was a #define and was thus exposing the real type
of the page flags field.

In addition to fixing up the definitions of page_to_nid and zone_to_nid I
audited the users of these functions identifying the following incorrect
uses:

1) mm/page_alloc.c show_node() -- printk dumping the node id,
2) include/asm-ia64/pgalloc.h pgtable_quicklist_free() -- comparison
   against numa_node_id() which returns an int from cpu_to_node(), and
3) mm/mpolicy.c check_pte_range -- used as an index in node_isset which
   uses bit_set which in generic code takes an int.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Christoph Lameter ebe29738f3 [PATCH] Remove uses of kmem_cache_t from mm/* and include/linux/slab.h
Remove all uses of kmem_cache_t (the most were left in slab.h).  The
typedef for kmem_cache_t is then only necessary for other kernel
subsystems.  Add a comment to that effect.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Christoph Lameter b86c089b83 [PATCH] Move names_cachep to linux/fs.h
The names_cachep is used for getname() and putname().  So lets put it into
fs.h near those two definitions.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Christoph Lameter aa362a83e7 [PATCH] Move fs_cachep to linux/fs_struct.h
fs_cachep is only used in kernel/exit.c and in kernel/fork.c.

It is used to store fs_struct items so it should be placed in linux/fs_struct.h

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Christoph Lameter 8b7d91eb7f [PATCH] Move filep_cachep to include/file.h
filp_cachep is only used in fs/file_table.c and in fs/dcache.c where
it is defined.

Move it to related definitions in linux/file.h.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:23 -08:00
Christoph Lameter 5d6538fcf2 [PATCH] Move files_cachep to include/file.h
Proper place is in file.h since files_cachep uses are rated to file I/O.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:22 -08:00
Christoph Lameter c43692e85f [PATCH] Move vm_area_cachep to include/mm.h
vm_area_cachep is used to store vm_area_structs. So move to mm.h.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:22 -08:00
Christoph Lameter 298ec1e2ac [PATCH] Move sighand_cachep to include/signal.h
Move sighand_cachep definitioni to linux/signal.h

The sighand cache is only used in fs/exec.c and kernel/fork.c.  It is defined
in kernel/fork.c but only used in fs/exec.c.

The sighand_cachep is related to signal processing.  So add the definition to
signal.h.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:22 -08:00
Christoph Lameter 54cc211ce3 [PATCH] Remove bio_cachep from slab.h
Remove bio_cachep from slab.h - it no longer exists.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:22 -08:00
Christoph Hellwig b30973f877 [PATCH] node-aware skb allocation
Node-aware allocation of skbs for the receive path.

Details:

  - __alloc_skb gets a new node argument and cals the node-aware
    slab functions with it.
  - netdev_alloc_skb passed the node number it gets from dev_to_node
    to it, everyone else passes -1 (any node)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:22 -08:00
Christoph Hellwig 873481367e [PATCH] add numa node information to struct device
For node-aware skb allocations we need information about the node in struct
net_device or struct device.  Davem suggested to put it into struct device
which this patch does.

In particular:

 - struct device gets a new int numa_node member if CONFIG_NUMA is set
 - there are two new helpers, dev_to_node and set_dev_node to
   transparently deal with the non-numa case
 - for pci devices the node-info is set to the value we get from
   pcibus_to_node.

Note that for some architectures pcibus_to_node doesn't work yet at the time
we call it currently.  This is harmless and will just mean skb allocations
aren't node-local on this architectures until the implementation of
pcibus_to_node on these architectures have been updated (There are patches for
x86 and x86_64 floating around)

[akpm@osdl.org: cleanup]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:22 -08:00
Christoph Hellwig 8b98c1699e [PATCH] leak tracking for kmalloc_node
We have variants of kmalloc and kmem_cache_alloc that leave leak tracking to
the caller.  This is used for subsystem-specific allocators like skb_alloc.

To make skb_alloc node-aware we need similar routines for the node-aware slab
allocator, which this patch adds.

Note that the code is rather ugly, but it mirrors the non-node-aware code 1:1:

[akpm@osdl.org: add module export]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:22 -08:00
Peter Zijlstra ad76fb6b5a [PATCH] mm: k{,um}map_atomic() vs in_atomic()
Make kmap_atomic/kunmap_atomic denote a pagefault disabled scope.  All non
trivial implementations already do this anyway.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:21 -08:00
Peter Zijlstra a866374aec [PATCH] mm: pagefault_{disable,enable}()
Introduce pagefault_{disable,enable}() and use these where previously we did
manual preempt increments/decrements to make the pagefault handler do the
atomic thing.

Currently they still rely on the increased preempt count, but do not rely on
the disabled preemption, this might go away in the future.

(NOTE: the extra barrier() in pagefault_disable might fix some holes on
       machines which have too many registers for their own good)

[heiko.carstens@de.ibm.com: s390 fix]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Nick Piggin <npiggin@suse.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:21 -08:00
Chen, Kenneth W 39dde65c99 [PATCH] shared page table for hugetlb page
Following up with the work on shared page table done by Dave McCracken.  This
set of patch target shared page table for hugetlb memory only.

The shared page table is particular useful in the situation of large number of
independent processes sharing large shared memory segments.  In the normal
page case, the amount of memory saved from process' page table is quite
significant.  For hugetlb, the saving on page table memory is not the primary
objective (as hugetlb itself already cuts down page table overhead
significantly), instead, the purpose of using shared page table on hugetlb is
to allow faster TLB refill and smaller cache pollution upon TLB miss.

With PT sharing, pte entries are shared among hundreds of processes, the cache
consumption used by all the page table is smaller and in return, application
gets much higher cache hit ratio.  One other effect is that cache hit ratio
with hardware page walker hitting on pte in cache will be higher and this
helps to reduce tlb miss latency.  These two effects contribute to higher
application performance.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Acked-by: Hugh Dickins <hugh@veritas.com>
Cc: Dave McCracken <dmccr@us.ibm.com>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Adam Litke <agl@us.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:21 -08:00
Nick Piggin cc10250907 [PATCH] mm: add arch_alloc_page
Add an arch_alloc_page to match arch_free_page.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:21 -08:00
Ashwin Chaugule 7602bdf2fd [PATCH] new scheme to preempt swap token
The new swap token patches replace the current token traversal algo.  The old
algo had a crude timeout parameter that was used to handover the token from
one task to another.  This algo, transfers the token to the tasks that are in
need of the token.  The urgency for the token is based on the number of times
a task is required to swap-in pages.  Accordingly, the priority of a task is
incremented if it has been badly affected due to swap-outs.  To ensure that
the token doesnt bounce around rapidly, the token holders are given a priority
boost.  The priority of tasks is also decremented, if their rate of swap-in's
keeps reducing.  This way, the condition to check whether to pre-empt the swap
token, is a matter of comparing two task's priority fields.

[akpm@osdl.org: cleanups]
Signed-off-by: Ashwin Chaugule <ashwin.chaugule@celunite.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:21 -08:00
Paul Jackson 7253f4ef04 [PATCH] memory page_alloc zonelist caching reorder structure
Rearrange the struct members in the 'struct zonelist_cache' structure, so
as to put the readonly (once initialized) z_to_n[] array first, where it
will come right after the zones[] array in struct zonelist.

This pretty much eliminates the chance that the two frequently written
elements of 'struct zonelist_cache', the fullzones bitmap and last_full_zap
times, will end up on the same cache line as the performance sensitive,
frequently read, never (after init) written zones[] array.

Keeping frequently written data off frequently read cache lines is good for
performance.

Thanks to Rohit Seth for the suggestion.

Signed-off-by: Paul Jackson <pj@sgi.com>
Cc: Rohit Seth <rohitseth@google.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:20 -08:00
Paul Jackson 9276b1bc96 [PATCH] memory page_alloc zonelist caching speedup
Optimize the critical zonelist scanning for free pages in the kernel memory
allocator by caching the zones that were found to be full recently, and
skipping them.

Remembers the zones in a zonelist that were short of free memory in the
last second.  And it stashes a zone-to-node table in the zonelist struct,
to optimize that conversion (minimize its cache footprint.)

Recent changes:

    This differs in a significant way from a similar patch that I
    posted a week ago.  Now, instead of having a nodemask_t of
    recently full nodes, I have a bitmask of recently full zones.
    This solves a problem that last weeks patch had, which on
    systems with multiple zones per node (such as DMA zone) would
    take seeing any of these zones full as meaning that all zones
    on that node were full.

    Also I changed names - from "zonelist faster" to "zonelist cache",
    as that seemed to better convey what we're doing here - caching
    some of the key zonelist state (for faster access.)

    See below for some performance benchmark results.  After all that
    discussion with David on why I didn't need them, I went and got
    some ;).  I wanted to verify that I had not hurt the normal case
    of memory allocation noticeably.  At least for my one little
    microbenchmark, I found (1) the normal case wasn't affected, and
    (2) workloads that forced scanning across multiple nodes for
    memory improved up to 10% fewer System CPU cycles and lower
    elapsed clock time ('sys' and 'real').  Good.  See details, below.

    I didn't have the logic in get_page_from_freelist() for various
    full nodes and zone reclaim failures correct.  That should be
    fixed up now - notice the new goto labels zonelist_scan,
    this_zone_full, and try_next_zone, in get_page_from_freelist().

There are two reasons I persued this alternative, over some earlier
proposals that would have focused on optimizing the fake numa
emulation case by caching the last useful zone:

 1) Contrary to what I said before, we (SGI, on large ia64 sn2 systems)
    have seen real customer loads where the cost to scan the zonelist
    was a problem, due to many nodes being full of memory before
    we got to a node we could use.  Or at least, I think we have.
    This was related to me by another engineer, based on experiences
    from some time past.  So this is not guaranteed.  Most likely, though.

    The following approach should help such real numa systems just as
    much as it helps fake numa systems, or any combination thereof.

 2) The effort to distinguish fake from real numa, using node_distance,
    so that we could cache a fake numa node and optimize choosing
    it over equivalent distance fake nodes, while continuing to
    properly scan all real nodes in distance order, was going to
    require a nasty blob of zonelist and node distance munging.

    The following approach has no new dependency on node distances or
    zone sorting.

See comment in the patch below for a description of what it actually does.

Technical details of note (or controversy):

 - See the use of "zlc_active" and "did_zlc_setup" below, to delay
   adding any work for this new mechanism until we've looked at the
   first zone in zonelist.  I figured the odds of the first zone
   having the memory we needed were high enough that we should just
   look there, first, then get fancy only if we need to keep looking.

 - Some odd hackery was needed to add items to struct zonelist, while
   not tripping up the custom zonelists built by the mm/mempolicy.c
   code for MPOL_BIND.  My usual wordy comments below explain this.
   Search for "MPOL_BIND".

 - Some per-node data in the struct zonelist is now modified frequently,
   with no locking.  Multiple CPU cores on a node could hit and mangle
   this data.  The theory is that this is just performance hint data,
   and the memory allocator will work just fine despite any such mangling.
   The fields at risk are the struct 'zonelist_cache' fields 'fullzones'
   (a bitmask) and 'last_full_zap' (unsigned long jiffies).  It should
   all be self correcting after at most a one second delay.

 - This still does a linear scan of the same lengths as before.  All
   I've optimized is making the scan faster, not algorithmically
   shorter.  It is now able to scan a compact array of 'unsigned
   short' in the case of many full nodes, so one cache line should
   cover quite a few nodes, rather than each node hitting another
   one or two new and distinct cache lines.

 - If both Andi and Nick don't find this too complicated, I will be
   (pleasantly) flabbergasted.

 - I removed the comment claiming we only use one cachline's worth of
   zonelist.  We seem, at least in the fake numa case, to have put the
   lie to that claim.

 - I pay no attention to the various watermarks and such in this performance
   hint.  A node could be marked full for one watermark, and then skipped
   over when searching for a page using a different watermark.  I think
   that's actually quite ok, as it will tend to slightly increase the
   spreading of memory over other nodes, away from a memory stressed node.

===============

Performance - some benchmark results and analysis:

This benchmark runs a memory hog program that uses multiple
threads to touch alot of memory as quickly as it can.

Multiple runs were made, touching 12, 38, 64 or 90 GBytes out of
the total 96 GBytes on the system, and using 1, 19, 37, or 55
threads (on a 56 CPU system.)  System, user and real (elapsed)
timings were recorded for each run, shown in units of seconds,
in the table below.

Two kernels were tested - 2.6.18-mm3 and the same kernel with
this zonelist caching patch added.  The table also shows the
percentage improvement the zonelist caching sys time is over
(lower than) the stock *-mm kernel.

      number     2.6.18-mm3	   zonelist-cache    delta (< 0 good)	percent
 GBs    N  	------------	   --------------    ----------------	systime
 mem threads   sys user  real	  sys  user  real     sys  user  real	 better
  12	 1     153   24   177	  151	 24   176      -2     0    -1	   1%
  12	19	99   22     8	   99	 22	8	0     0     0	   0%
  12	37     111   25     6	  112	 25	6	1     0     0	  -0%
  12	55     115   25     5	  110	 23	5      -5    -2     0	   4%
  38	 1     502   74   576	  497	 73   570      -5    -1    -6	   0%
  38	19     426   78    48	  373	 76    39     -53    -2    -9	  12%
  38	37     544   83    36	  547	 82    36	3    -1     0	  -0%
  38	55     501   77    23	  511	 80    24      10     3     1	  -1%
  64	 1     917  125  1042	  890	124  1014     -27    -1   -28	   2%
  64	19    1118  138   119	  965	141   103    -153     3   -16	  13%
  64	37    1202  151    94	 1136	150    81     -66    -1   -13	   5%
  64	55    1118  141    61	 1072	140    58     -46    -1    -3	   4%
  90	 1    1342  177  1519	 1275	174  1450     -67    -3   -69	   4%
  90	19    2392  199   192	 2116	189   176    -276   -10   -16	  11%
  90	37    3313  238   175	 2972	225   145    -341   -13   -30	  10%
  90	55    1948  210   104	 1843	213   100    -105     3    -4	   5%

Notes:
 1) This test ran a memory hog program that started a specified number N of
    threads, and had each thread allocate and touch 1/N'th of
    the total memory to be used in the test run in a single loop,
    writing a constant word to memory, one store every 4096 bytes.
    Watching this test during some earlier trial runs, I would see
    each of these threads sit down on one CPU and stay there, for
    the remainder of the pass, a different CPU for each thread.

 2) The 'real' column is not comparable to the 'sys' or 'user' columns.
    The 'real' column is seconds wall clock time elapsed, from beginning
    to end of that test pass.  The 'sys' and 'user' columns are total
    CPU seconds spent on that test pass.  For a 19 thread test run,
    for example, the sum of 'sys' and 'user' could be up to 19 times the
    number of 'real' elapsed wall clock seconds.

 3) Tests were run on a fresh, single-user boot, to minimize the amount
    of memory already in use at the start of the test, and to minimize
    the amount of background activity that might interfere.

 4) Tests were done on a 56 CPU, 28 Node system with 96 GBytes of RAM.

 5) Notice that the 'real' time gets large for the single thread runs, even
    though the measured 'sys' and 'user' times are modest.  I'm not sure what
    that means - probably something to do with it being slow for one thread to
    be accessing memory along ways away.  Perhaps the fake numa system, running
    ostensibly the same workload, would not show this substantial degradation
    of 'real' time for one thread on many nodes -- lets hope not.

 6) The high thread count passes (one thread per CPU - on 55 of 56 CPUs)
    ran quite efficiently, as one might expect.  Each pair of threads needed
    to allocate and touch the memory on the node the two threads shared, a
    pleasantly parallizable workload.

 7) The intermediate thread count passes, when asking for alot of memory forcing
    them to go to a few neighboring nodes, improved the most with this zonelist
    caching patch.

Conclusions:
 * This zonelist cache patch probably makes little difference one way or the
   other for most workloads on real numa hardware, if those workloads avoid
   heavy off node allocations.
 * For memory intensive workloads requiring substantial off-node allocations
   on real numa hardware, this patch improves both kernel and elapsed timings
   up to ten per-cent.
 * For fake numa systems, I'm optimistic, but will have to leave that up to
   Rohit Seth to actually test (once I get him a 2.6.18 backport.)

Signed-off-by: Paul Jackson <pj@sgi.com>
Cc: Rohit Seth <rohitseth@google.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Cc: David Rientjes <rientjes@cs.washington.edu>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:20 -08:00
Christoph Lameter 89689ae7f9 [PATCH] Get rid of zone_table[]
The zone table is mostly not needed.  If we have a node in the page flags
then we can get to the zone via NODE_DATA() which is much more likely to be
already in the cpu cache.

In case of SMP and UP NODE_DATA() is a constant pointer which allows us to
access an exact replica of zonetable in the node_zones field.  In all of
the above cases there will be no need at all for the zone table.

The only remaining case is if in a NUMA system the node numbers do not fit
into the page flags.  In that case we make sparse generate a table that
maps sections to nodes and use that table to to figure out the node number.
 This table is sized to fit in a single cache line for the known 32 bit
NUMA platform which makes it very likely that the information can be
obtained without a cache miss.

For sparsemem the zone table seems to be have been fairly large based on
the maximum possible number of sections and the number of zones per node.
There is some memory saving by removing zone_table.  The main benefit is to
reduce the cache foootprint of the VM from the frequent lookups of zones.
Plus it simplifies the page allocator.

[akpm@osdl.org: build fix]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:20 -08:00
Andrew Morton 676dcb8bc2 [PATCH] add bottom_half.h
With CONFIG_SMP=n:

  drivers/input/ff-memless.c:384: warning: implicit declaration of function 'local_bh_disable'
  drivers/input/ff-memless.c:393: warning: implicit declaration of function 'local_bh_enable'

Really linux/spinlock.h should include linux/interrupt.h.  But interrupt.h
includes sched.h which will need spinlock.h.

So the patch breaks the _bh declarations out into a separate header and
includes it in both interrupt.h and spinlock.h.

Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: Andi Kleen <ak@suse.de>
Cc: <stable@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:20 -08:00
Pavel Pisa 86987d5bf4 [ARM] 3991/1: i.MX/MX1 high resolution time source
Enhanced resolution for time measurement functions.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-07 16:24:16 +00:00
Ben Dooks 9073341c2b [ARM] 3986/1: H1940: suspend to RAM support
Add support to suspend and resume, using the
H1940's bootloader

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-07 16:17:49 +00:00
Rod Whitby a47d08e2e3 [ARM] 3984/1: ixp4xx/nslu2: Fix disk LED numbering (take 2)
This patch fixes an error in the numbering of the disk LEDs on the
Linksys NSLU2. The error crept in because the physical location
of the LEDs has the Disk 2 LED *above* the Disk 1 LED.

Thanks to Gordon Farquharson for reporting this.

Signed-off-by: Rod Whitby <rod@whitby.id.au>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-07 16:17:06 +00:00
Nicolas Pitre 838ccbc35e [ARM] 3978/1: macro to provide a 63-bit value from a 32-bit hardware counter
This is done in a completely lockless fashion. Bits 0 to 31 of the count
are provided by the hardware while bits 32 to 62 are stored in memory.
The top bit in memory is used to synchronize with the hardware count
half-period.  When the top bit of both counters (hardware and in memory)
differ then the memory is updated with a new value, incrementing it when
the hardware counter wraps around.  Because a word store in memory is
atomic then the incremented value will always be in synch with the top
bit indicating to any potential concurrent reader if the value in memory
is up to date or not wrt the needed increment.  And any race in updating
the value in memory is harmless as the same value would be stored more
than once.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-07 16:06:45 +00:00
Nicolas Pitre fa4adc6149 [ARM] 3611/4: optimize do_div() when divisor is constant
On ARM all divisions have to be performed "manually".  For 64-bit
divisions that may take more than a hundred cycles in many cases.

With 32-bit divisions gcc already use the recyprocal of constant
divisors to perform a multiplication, but not with 64-bit divisions.

Since the kernel is increasingly relying upon 64-bit divisions it is
worth optimizing at least those cases where the divisor is a constant.
This is what this patch does using plain C code that gets optimized away
at compile time.

For example, despite the amount of added C code, do_div(x, 10000) now
produces the following assembly code (where x is assigned to r0-r1):

	adr	r4, .L0
	ldmia	r4, {r4-r5}
	umull	r2, r3, r4, r0
	mov	r2, #0
	umlal	r3, r2, r5, r0
	umlal	r3, r2, r4, r1
	mov	r3, #0
	umlal	r2, r3, r5, r1
	mov	r0, r2, lsr #11
	orr	r0, r0, r3, lsl #21
	mov	r1, r3, lsr #11
	...
.L0:
	.word	948328779
	.word	879609302

which is the fastest that can be done for any value of x in that case,
many times faster than the __do_div64 code (except for the small x value
space for which the result ends up being zero or a single bit).

The fact that this code is generated inline produces a tiny increase in
.text size, but not significant compared to the needed code around each
__do_div64 call site this code is replacing.

The algorithm used has been validated on a 16-bit scale for all possible
values, and then recodified for 64-bit values.  Furthermore I've been
running it with the final BUG_ON() uncommented for over two months now
with no problem.

Note that this new code is compiled with gcc versions 4.0 or later.
Earlier gcc versions proved themselves too problematic and only the
original code is used with them.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-07 16:06:09 +00:00
Michael Chan 9d26e21342 [TG3]: Add TG3_FLG2_IS_NIC flag.
Add Tg3_FLG2_IS_NIC flag to unambiguously determine whether the
device is NIC or onboard.  Previously, the EEPROM_WRITE_PROT flag was
overloaded to also mean onboard.  With the separation, we can
support some devices that are onboard but do not use eeprom write
protect.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-07 00:21:14 -08:00
Michael Chan 676917d488 [TG3]: Add 5787F device ID.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-07 00:20:22 -08:00
Joy Latten c9204d9ca7 audit: disable ipsec auditing when CONFIG_AUDITSYSCALL=n
Disables auditing in ipsec when CONFIG_AUDITSYSCALL is
disabled in the kernel.

Also includes a bug fix for xfrm_state.c as a result of
original ipsec audit patch.

Signed-off-by: Joy Latten <latten@austin.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-06 20:14:23 -08:00
Joy Latten 161a09e737 audit: Add auditing to ipsec
An audit message occurs when an ipsec SA
or ipsec policy is created/deleted.

Signed-off-by: Joy Latten <latten@austin.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-06 20:14:22 -08:00
Randy Dunlap 95b99a670d [IRDA] irlan: Fix compile warning when CONFIG_PROC_FS=n
include/net/irda/irlan_filter.h:31: warning: 'struct seq_file' declared inside parameter list
include/net/irda/irlan_filter.h:31: warning: its scope is only this definition or declaration, which is probably not what you want

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-06 20:10:07 -08:00
Yasuyuki Kozakai 9ee0779e99 [NETFILTER]: nf_conntrack: fix warning in PPTP helper
Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-06 18:39:04 -08:00
Rik Snel c494e0705d [CRYPTO] lib: table driven multiplications in GF(2^128)
A lot of cypher modes need multiplications in GF(2^128). LRW, ABL, GCM...
I use functions from this library in my LRW implementation and I will
also use them in my ABL (Arbitrary Block Length, an unencumbered (correct
me if I am wrong, wide block cipher mode).

Elements of GF(2^128) must be presented as u128 *, it encourages automatic
and proper alignment.

The library contains support for two different representations of GF(2^128),
see the comment in gf128mul.h. There different levels of optimization
(memory/speed tradeoff).

The code is based on work by Dr Brian Gladman. Notable changes:
- deletion of two optimization modes
- change from u32 to u64 for faster handling on 64bit machines
- support for 'bbe' representation in addition to the, already implemented,
  'lle' representation.
- move 'inline void' functions from header to 'static void' in the
  source file
- update to use the linux coding style conventions

The original can be found at:
http://fp.gladman.plus.com/AES/modes.vc8.19-06-06.zip

The copyright (and GPL statement) of the original author is preserved.

Signed-off-by: Rik Snel <rsnel@cube.dyndns.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2006-12-06 18:38:55 -08:00
Rik Snel aec3694b98 [CRYPTO] lib: some common 128-bit block operations, nicely centralized
128bit is a common blocksize in linux kernel cryptography, so it helps to
centralize some common operations.

The code, while mostly trivial, is based on a header file mode_hdr.h in
http://fp.gladman.plus.com/AES/modes.vc8.19-06-06.zip

The original copyright (and GPL statement) of the original author,
Dr Brian Gladman, is preserved.

Signed-off-by: Rik Snel <rsnel@cube.dyndns.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2006-12-06 18:38:55 -08:00
Adrian Bunk cc44215eaa [CRYPTO] api: Remove unused functions
This patch removes the following no longer used functions:
- api.c: crypto_alg_available()
- digest.c: crypto_digest_init()
- digest.c: crypto_digest_update()
- digest.c: crypto_digest_final()
- digest.c: crypto_digest_digest()

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2006-12-06 18:38:54 -08:00
Kazunori MIYAZAWA 7cf4c1a5fd [IPSEC]: Add support for AES-XCBC-MAC
The glue of xfrm.

Signed-off-by: Kazunori MIYAZAWA <miyazawa@linux-ipv6.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2006-12-06 18:38:51 -08:00
Jamal Hadi Salim 334c29a645 [GENETLINK]: Move command capabilities to flags.
This patch moves command capabilities to command flags. Other than
being cleaner, saves several bytes.
We increment the nlctrl version so as to signal to user space that
to not expect the attributes. We will try to be careful
not to do this too often ;->

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-06 18:38:41 -08:00
Jan Beulich b65780e123 [PATCH] unwinder: move .eh_frame to RODATA
The .eh_frame section contents is never written to, so it can as well
benefit from CONFIG_DEBUG_RODATA.

Diff-ed against firstfloor tree.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:19 +01:00
Burman Yan 116780fc04 [PATCH] i386: replace kmalloc+memset with kzalloc
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:19 +01:00
Adrian Bunk d7fb027128 [PATCH] x86-64: remove remaining pc98 code
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:19 +01:00
Andi Kleen 9dc452ba2d [PATCH] x86-64: Fix constraints in atomic_add_return()
Following i386 from Duncan Sands
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:13 +01:00
Duncan Sands e4b522d7ef [PATCH] x86-64: fix asm constraints in i386 atomic_add_return
Since v->counter is both read and written, it should be an output as well
as an input for the asm.  The current code only gets away with this because
counter is volatile.  Also, according to Documents/atomic_ops.txt,
atomic_add_return should provide a memory barrier, in particular a compiler
barrier, so the asm should be marked as clobbering memory.

Test case:

#include <stdio.h>

typedef struct { int counter; } atomic_t; /* NB: no "volatile" */

#define ATOMIC_INIT(i)	{ (i) }

#define atomic_read(v)		((v)->counter)

static __inline__ int atomic_add_return(int i, atomic_t *v)
{
	int __i = i;

	__asm__ __volatile__(
		"lock; xaddl %0, %1;"
		:"=r"(i)
		:"m"(v->counter), "0"(i));
/*	__asm__ __volatile__(
		"lock; xaddl %0, %1"
		:"+r" (i), "+m" (v->counter)
		: : "memory"); */
	return i + __i;
}

int main (void) {
	atomic_t a = ATOMIC_INIT(0);
	int x;

	x = atomic_add_return (1, &a);
	if ((x!=1) || (atomic_read(&a)!=1))
		printf("fail: %i, %i\n", x, atomic_read(&a));
}

Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:13 +01:00
Adrian Bunk 9ee4016888 [PATCH] x86-64: include/asm-x86_64/cpufeature.h isn't a userspace header
Nothing in include/asm-x86_64/cpufeature.h is part of the
userspace<->kernel interface.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:13 +01:00
Venkatesh Pallipadi d331e739f5 [PATCH] x86-64: Fix interrupt race in idle callback (3rd try)
Idle callbacks has some races when enter_idle() sets isidle and subsequent
interrupts that can happen on that CPU, before CPU goes to idle. Due to this,
an IDLE_END can get called before IDLE_START. To avoid these races, disable
interrupts before enter_idle and make sure that all idle routines do not
enable interrupts before entering idle.

Note that poll_idle() still has a this race as it has to enable interrupts
before going to idle. But, all other idle routines have the race fixed.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:13 +01:00
Jan Beulich 359ad0d401 [PATCH] unwinder: more sanity checks in Dwarf2 unwinder
Tighten the requirements on both input to and output from the Dwarf2
unwinder.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:13 +01:00
Adrian Bunk a1a70c25be [PATCH] i386: always enable regparm
-mregparm=3 has been enabled by default for some time on i386, and AFAIK
there aren't any problems with it left.

This patch removes the REGPARM config option and sets -mregparm=3
unconditionally.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:12 +01:00
Chuck Ebbert 0741f4d207 [PATCH] x86: add sysctl for kstack_depth_to_print
Add sysctl for kstack_depth_to_print. This lets users change
the amount of raw stack data printed in dump_stack() without
having to reboot.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:11 +01:00
Wink Saville c7a3392e9e [PATCH] x86-64: Fix comments for MSR_FS_BASE and MSR_GS_BASE.
The comments for MSR_FS_BASE & MSR_GS_BASE were transposed.

Signed-off-by: Wink Saville <wink@saville.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:11 +01:00
Artiom Myaskouvskey bf7e6a1963 [PATCH] i386: Preserve EFI run time regions with memmap parameter
When using memmap kernel parameter in EFI boot we should also add to memory map
memory regions of runtime services to enable their mapping later.

AK: merged and cleaned up the patch

Signed-off-by: Artiom Myaskouvskey <artiom.myaskouvskey@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:11 +01:00
Stephane Eranian 538f188e03 [PATCH] i386: i386 add Intel BTS cpufeature bit and detection (take 2)
Here is a small patch for i386 which adds a cpufeature flag and
detection code for Intel's Branch Trace Store (BTS) feature. This
feature can be found on Intel P4 and Core 2 processors among others.
It can also be used by perfmon.

changelog:
	- add CPU_FEATURE_BTS
	- add Branch Trace Store detection

signed-off-by: stephane eranian <eranian@hpl.hp.com>

Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:11 +01:00
Stephane Eranian ee58fad51a [PATCH] x86-64: x86-64 add Intel BTS cpufeature bit and detection (take 2)
Here is a small patch for x86-64 which adds a cpufeature flag and
detection code for Intel's Branch Trace Store (BTS) feature. This
feature can be found on Intel P4 and Core 2 processors among others.
It can also be used by perfmon.

changelog:
	- add CPU_FEATURE_BTS
	- add Branch Trace Store detection

signed-off-by: stephane eranian <eranian@hpl.hp.com>

Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:11 +01:00
Artiom Myaskouvskey e1cccf48b1 [PATCH] i386: call efi_get_time during suspend
Function efi_get_time called not only during init kernel phase but also
during suspend (from get_cmos_time).

When it is called from get_cmos_time the corresponding runtime service
should be called in virtual and not in physical mode.

Signed-off-by: Artiom Myaskouvskey <artiom.myaskouvskey@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: "Narayanan, Chandramouli" <chandramouli.narayanan@intel.com>
Cc: "Jiossy, Rami" <rami.jiossy@intel.com>
Cc: "Satt, Shai" <shai.satt@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:11 +01:00
Siddha, Suresh B b0d0a4ba45 [PATCH] x86: fix the irqbalance quirk for E7320/E7520/E7525
Move the irqbalance quirks for E7320/E7520/E7525(Errata 23 in
http://download.intel.com/design/chipsets/specupdt/30304203.pdf) to early
quirks.

And add a PCI quirk for these platforms to check(which happens very late
during the boot) if the APIC routing is indeed set to default flat mode.

This fixes the breakage(in x86_64) of this quirk due to cpu hotplug which
selects physical mode instead of the logical flat(as needed for this errata
workaround).

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: "Li, Shaohua" <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:10 +01:00
Siddha, Suresh B 9899f826fc [PATCH] x86-64: add genapic_force
Add genapic_force. Used by the next Intel quirks patch.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: "Li, Shaohua" <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:10 +01:00
Siddha, Suresh B 72486f1f8f [PATCH] i386: change the 'no_control' field to 'hotpluggable' in the struct cpu
Change the 'no_control' field in the cpu struct to a more positive
and better term 'hotpluggable'. And change(/cleanup) the logic accordingly.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: "Li, Shaohua" <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:10 +01:00
Siddha, Suresh B fd6d7d2689 [PATCH] i386: introduce the mechanism of disabling cpu hotplug control
Add 'enable_cpu_hotplug' flag and when cleared, the hotplug control file
("online") will not be added under /sys/devices/system/cpu/cpuX/

Next patch doing PCI quirks will use this.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: "Li, Shaohua" <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:10 +01:00
Siddha, Suresh B 274e1bbdee [PATCH] x86: add write_pci_config_byte() to direct PCI access routines
Mechanism of selecting physical mode in genapic when cpu hotplug is enabled on
x86_64, broke the quirk(quirk_intel_irqbalance()) introduced for working
around the transposing interrupt message errata in E7520/E7320/E7525 (revision
ID 0x9 and below.  errata #23 in
http://download.intel.com/design/chipsets/specupdt/30304203.pdf).

This errata requires the mode to be in logical flat, so that interrupts can be
directed to more than one cpu(and thus use hardware IRQ balancing enabled by
BIOS on these platforms).

Following four patches fixes this by moving the quirk to early quirk and
forcing the x86_64 genapic selection to logical flat on these platforms.

Thanks to Shaohua for pointing out the breakage.

This patch:

Add write_pci_config_byte() to direct PCI access  routines

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: "Li, Shaohua" <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:10 +01:00
Jan Beulich eab724e5df [PATCH] x86-64: adjust pmd_bad()
Make pmd_bad() symmetrical to pgd_bad() and pud_bad(). At once,
simplify them all.

TBD: tighten down the checks again as suggested by Hugh D.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:09 +01:00
Jan Beulich 4a1c422750 [PATCH] x86-64: remove prototype of free_bootmem_generic()
The function doesn't exist (anymore).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:09 +01:00
Ernie Petrides 103efcd9aa [PATCH] x86-64: fix perms/range of vsyscall vma in /proc/*/maps
The final line of /proc/<pid>/maps on x86_64 for native 64-bit
tasks shows an incorrect ending address and incorrect permissions.  There
is only a single page mapped in this vsyscall region, and it is accessible
for both read and execute.

The patch below fixes this.  (Since 32-bit-compat tasks have a real vma
with correct perms/range, no change is necessary for that scenario.)

Before the patch, a "cat /proc/self/maps | tail -1" shows this:

        ffffffffff600000-ffffffffffe00000 ---p 00000000 [...]

After the patch, this is the output:

        ffffffffff600000-ffffffffff601000 r-xp 00000000 [...]

Signed-off-by: Ernie Petrides <petrides@redhat.com>
Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:09 +01:00
Andi Kleen c55d92d141 [PATCH] i386: Add support for compilation for Core2
gcc doesn't support -mtune=core2 yet, but will be soon. Use -mtune=generic or -mtune=i686
as fallback

TBD need benchmarking for INTEL_USERCOPY etc. So far I used the same defaults as MPENTIUMM

Signed-off-by: Andi Kleen <ak@suse.de>
2006-12-07 02:14:09 +01:00
Zachary Amsden 8ecb895069 [PATCH] paravirt: fix missing pte update
The function ptep_get_and_clear uses an atomic instruction sequence to get and
clear an active pte.  Rather than add such an atomic operator to all virtual
machine implementations in paravirt-ops, it is easier to support the raw
atomic sequence and use either a trapping writable pagetable approach, or a
post-update notification.  For the post update notification, we require the
pte_update function to be called after the access.  Combine the 2-level and
3-level paging operators into one common function which does the post-update
notification, and rename the actual atomic sequences to raw_ptep_xxx
operators.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@muc.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:09 +01:00
Zachary Amsden dfbea0ad50 [PATCH] paravirt: fix parameter names in mmu operations
Make parameter names match function argument names for the yet to be defined
pte_update_defer accessor.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@muc.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:08 +01:00
Zachary Amsden a2952d8949 [PATCH] paravirt: Preparatory mmu header movement
Move header includes for the nopud / nopmd types to the location of the actual
pte / pgd type definitions.  This allows generic 4-level page type code to be
written before the split 2/3 level page table headers are included.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@muc.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:08 +01:00
Rusty Russell da181a8b39 [PATCH] paravirt: Add MMU virtualization to paravirt_ops
Add the three bare TLB accessor functions to paravirt-ops.  Most amusingly,
flush_tlb is redefined on SMP, so I can't call the paravirt op flush_tlb.
Instead, I chose to indicate the actual flush type, kernel (global) vs. user
(non-global).  Global in this sense means using the global bit in the page
table entry, which makes TLB entries persistent across CR3 reloads, not
global as in the SMP sense of invoking remote shootdowns, so the term is
confusingly overloaded.

AK: folded in fix from Zach for PAE compilation

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:08 +01:00
Rusty Russell 13623d7930 [PATCH] paravirt: Add APIC accessors to paravirt-ops.
Add APIC accessors to paravirt-ops.  Unfortunately, we need two write
functions, as some older broken hardware requires workarounds for
Pentium APIC errata - this is the purpose of apic_write_atomic.

AK: replaced __inline with inline

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:08 +01:00
Rusty Russell 4f205fd45a [PATCH] paravirt: Allow selected bug checks to be
Allow selected bug checks to be skipped by paravirt kernels.  The two most
important are the F00F workaround (which is either done by the hypervisor,
or not required), and the 'hlt' instruction check, which can break under
some hypervisors.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:08 +01:00
Rusty Russell c9ccf30d77 [PATCH] paravirt: Add startup infrastructure for paravirtualization
1) Each hypervisor writes a probe function to detect whether we are
   running under that hypervisor.  paravirt_probe() registers this
   function.

2) If vmlinux is booted with ring != 0, we call all the probe
   functions (with registers except %esp intact) in link order: the
   winner will not return.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:08 +01:00
Rusty Russell d7cd56111f [PATCH] i386: cpu_detect extraction
Both lhype and Xen want to call the core of the x86 cpu detect code before
calling start_kernel.

(extracted from larger patch)

AK: folded in start_kernel header patch

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:08 +01:00
Rusty Russell 139ec7c416 [PATCH] paravirt: Patch inline replacements for paravirt intercepts
It turns out that the most called ops, by several orders of magnitude,
are the interrupt manipulation ops.  These are obvious candidates for
patching, so mark them up and create infrastructure for it.

The method used is that the ops structure has a patch function, which
is called for each place which needs to be patched: this returns a
number of instructions (the rest are NOP-padded).

Usually we can spare a register (%eax) for the binary patched code to
use, but in a couple of critical places in entry.S we can't: we make
the clobbers explicit at the call site, and manually clobber the
allowed registers in debug mode as an extra check.

And:

Don't abuse CONFIG_DEBUG_KERNEL, add CONFIG_DEBUG_PARAVIRT.

And:

AK:  Fix warnings in x86-64 alternative.c build

And:

AK: Fix compilation with defconfig

And:

^From: Andrew Morton <akpm@osdl.org>

Some binutlises still like to emit references to __stop_parainstructions and
__start_parainstructions.

And:

AK: Fix warnings about unused variables when PARAVIRT is disabled.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-12-07 02:14:08 +01:00
Rusty Russell d3561b7fa0 [PATCH] paravirt: header and stubs for paravirtualisation
Create a paravirt.h header for all the critical operations which need to be
replaced with hypervisor calls, and include that instead of defining native
operations, when CONFIG_PARAVIRT.

This patch does the dumbest possible replacement of paravirtualized
instructions: calls through a "paravirt_ops" structure.  Currently these are
function implementations of native hardware: hypervisors will override the ops
structure with their own variants.

All the pv-ops functions are declared "fastcall" so that a specific
register-based ABI is used, to make inlining assember easier.

And:

+From: Andy Whitcroft <apw@shadowen.org>

The paravirt ops introduce a 'weak' attribute onto memory_setup().
Code ordering leads to the following warnings on x86:

    arch/i386/kernel/setup.c:651: warning: weak declaration of
                `memory_setup' after first use results in unspecified behavior

Move memory_setup() to avoid this.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
2006-12-07 02:14:07 +01:00