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IS_ERR() already implies unlikely(), so it can be omitted here.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jan Kara <jack@suse.cz>
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The addition of 64k block capability in the rec_len_from_disk
and rec_len_to_disk functions added a bit of math overhead which
slows down file create workloads needlessly when the architecture
cannot even support 64k blocks, thanks to page size limits.
Similar changes already exist in the ext4 codebase.
The directory entry checking can also be optimized a bit
by sprinkling in some unlikely() conditions to move the
error handling out of line.
bonnie++ sequential file creates on a 512MB ramdisk speeds up
from about 77,000/s to about 82,000/s, about a 6% improvement.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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The addition of 64k block capability in the rec_len_from_disk
and rec_len_to_disk functions added a bit of math overhead which
slows down file create workloads needlessly when the architecture
cannot even support 64k blocks, thanks to page size limits.
The directory entry checking can also be optimized a bit
by sprinkling in some unlikely() conditions to move the
error handling out of line.
bonnie++ sequential file creates on a 512MB ramdisk speeds up
from about 2200/s to about 2500/s, about a 14% improvement.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Check return value of ext3_journal_get_write_acccess() and
ext3_journal_dirty_metadata().
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Check return value of ext3_journal_get_write_access() and
ext3_journal_dirty_metadata().
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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fallout
Use %pV in __quota_error so a single printk can not be
interleaved with other logging messages.
Add __attribute__((format (printf, 3, 4))) so format
and arguments can be verified by compiler.
Make sure printk formats and arguments match.
Block # needed a pointer dereference.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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The ioctl takes fstrim_range structure (defined in include/linux/fs.h) as an
argument specifying a range of filesystem to trim and the minimum size of an
continguous extent to trim. After the FITRIM is done, the number of bytes
passed from the filesystem down the block stack to the device for potential
discard is stored in fstrim_range.len. This number is a maximum discard amount
from the storage device's perspective, because FITRIM called repeatedly will
keep sending the same sectors for discard. fstrim_range.len will report the
same potential discard bytes each time, but only sectors which had been written
to between the discards would actually be discarded by the storage device.
Further, the kernel block layer reserves the right to adjust the discard ranges
to fit raid stripe geometry, non-trim capable devices in a LVM setup, etc.
These reductions would not be reflected in fstrim_range.len.
Thus fstrim_range.len can give the user better insight on how much storage
space has potentially been released for wear-leveling, but it needs to be one
of only one criteria the userspace tools take into account when trying to
optimize calls to FITRIM.
Thanks to Greg Freemyer <greg.freemyer@gmail.com> for better commit message.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Walk through allocation groups and trim all free extents. It can be
invoked through FITRIM ioctl on the file system. The main idea is to
provide a way to trim the whole file system if needed, since some SSD's
may suffer from performance loss after the whole device was filled (it
does not mean that fs is full!).
It search for free extents in allocation groups specified by Byte range
start -> start+len. When the free extent is within this range, blocks are
marked as used and then trimmed. Afterwards these blocks are marked as
free in per-group bitmap.
[JK: Fixed up error handling and trimming of a single group]
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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Since check_eofblocks_fl() only uses the m_lblk portion of the map
structure, we may as well pass that directly, rather than passing the
entire map, which IMHO obfuscates what parameters check_eofblocks_fl()
cares about. Not a big deal, but seems tidier and less confusing, to
me.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Commit 40389687 moved a call to ext4_forget() out of
ext4_free_branches and let ext4_free_blocks() handle calling
bforget(). But that change unfortunately did not replace the call to
ext4_forget() with brelse(), which was needed to drop the in-use count
of the indirect block's buffer head, which lead to a memory leak when
deleting files that used indirect blocks. Fix this.
Thanks to Hugh Dickins for pointing this out.
Cc: stable@kernel.org
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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This function was never implemented, except for a BUG_ON which was
tripping when ext4 is run without a journal. The problem is that
although the comment asserts that "truncate (which is the only way to
free block) discards all preallocations", ext4_free_blocks() is also
called in various error recovery paths when blocks have been
allocated, but for various reasons, we were not able to use those data
blocks (for example, because we ran out of memory while trying to
manipulate the extent tree, or some other similar situation).
In addition to the fact that this function isn't implemented except
for the incorrect BUG_ON, the single caller of this function,
ext4_free_blocks(), doesn't use it all if the journal is enabled.
So remove the (stub) function entirely for now. If we decide it's
better to add it back, it's only going to be useful with a relatively
large number of code changes anyway.
Google-Bug-Id: 3236408
Cc: Jiaying Zhang <jiayingz@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Ted first found the bug when running 2.6.36 kernel with dioread_nolock
mount option that xfstests #13 complained about wrong file size during fsck.
However, the bug exists in the older kernels as well although it is
somehow harder to trigger.
The problem is that ext4_end_io_work() can happen after we have truncated an
inode to a smaller size. Then when ext4_end_io_work() calls
ext4_convert_unwritten_extents(), we may reallocate some blocks that have
been truncated, so the inode size becomes inconsistent with the allocated
blocks.
The following patch flushes the i_completed_io_list during truncate to reduce
the risk that some pending end_io requests are executed later and convert
already truncated blocks to initialized.
Note that although the fix helps reduce the problem a lot there may still
be a race window between vmtruncate() and ext4_end_io_work(). The fundamental
problem is that if vmtruncate() is called without either i_mutex or i_alloc_sem
held, it can race with an ongoing write request so that the io_end request is
processed later when the corresponding blocks have been truncated.
Ted and I have discussed the problem offline and we saw a few ways to fix
the race completely:
a) We guarantee that i_mutex lock and i_alloc_sem write lock are both hold
whenever vmtruncate() is called. The i_mutex lock prevents any new write
requests from entering writeback and the i_alloc_sem prevents the race
from ext4_page_mkwrite(). Currently we hold both locks if vmtruncate()
is called from do_truncate(), which is probably the most common case.
However, there are places where we may call vmtruncate() without holding
either i_mutex or i_alloc_sem. I would like to ask for other people's
opinions on what locks are expected to be held before calling vmtruncate().
There seems a disagreement among the callers of that function.
b) We change the ext4 write path so that we change the extent tree to contain
the newly allocated blocks and update i_size both at the same time --- when
the write of the data blocks is completed.
c) We add some additional locking to synchronize vmtruncate() and
ext4_end_io_work(). This approach may have performance implications so we
need to be careful.
All of the above proposals may require more substantial changes, so
we may consider to take the following patch as a bandaid.
Signed-off-by: Jiaying Zhang <jiayingz@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Call ext4_std_error() in various places when we can't bail out
cleanly, so the file system can be marked as in error.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
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Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
[Modified to hit the right file]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
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Dynamically detect the DBx500 SOC an revision based on the ASIC ID.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
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Rename the MOP board Kconfig entries to the same name as the machine
type, so that the machine_is_*() macros work correctly.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
[Updated to match changes in the tree]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
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To allow the possiblity of building U8500 and U5500 support in the same
image.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
[Rebased to latest changes in Russells tree]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
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When ext4_trim_fs() is called to trim a part of a single group, the
logic will wrongly set last block of the interval to 'len' instead
of 'first_block + len'. Thus a shorter interval is possibly trimmed.
Fix it.
CC: Lukas Czerner <lczerner@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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fs/ext4/super.c: In function 'ext4_register_li_request':
fs/ext4/super.c:2936: warning: 'ret' may be used uninitialized in this function
It looks buggy to me, too.
Cc: Lukas Czerner <lczerner@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Replace the jbd2_inode structure (which is 48 bytes) with a pointer
and only allocate the jbd2_inode when it is needed --- that is, when
the file system has a journal present and the inode has been opened
for writing. This allows us to further slim down the ext4_inode_info
structure.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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We can store the dynamic inode state flags in the high bits of
EXT4_I(inode)->i_flags, and eliminate i_state_flags. This saves 8
bytes from the size of ext4_inode_info structure, which when
multiplied by the number of the number of in the inode cache, can save
a lot of memory.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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By reordering the elements in the ext4_inode_info structure, we can
reduce the padding needed on an x86_64 system by 16 bytes.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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We can encode the ec_type information by using ee_len == 0 to denote
EXT4_EXT_CACHE_NO, ee_start == 0 to denote EXT4_EXT_CACHE_GAP, and if
neither is true, then the cache type must be EXT4_EXT_CACHE_EXTENT.
This allows us to reduce the size of ext4_ext_inode by another 8
bytes. (ec_type is 4 bytes, plus another 4 bytes of padding)
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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This fixes a number of places where we used sector_t instead of
ext4_lblk_t for logical blocks, which for ext4 are still 32-bit data
types. No point wasting space in the ext4_inode_info structure, and
requiring 64-bit arithmetic on 32-bit systems, when it isn't
necessary.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Remove the short element i_delalloc_reserved_flag from the
ext4_inode_info structure and replace it a new bit in i_state_flags.
Since we have an ext4_inode_info for every ext4 inode cached in the
inode cache, any savings we can produce here is a very good thing from
a memory utilization perspective.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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ext4_ext_find_goal() returns an ideal physical block number that the block
allocator tries to allocate first. However, if a required file offset is
smaller than the existing extent's one, ext4_ext_find_goal() returns
a wrong block number because it may overflow at
"block - le32_to_cpu(ex->ee_block)". This patch fixes the problem.
ext4_ext_find_goal() will also return a wrong block number in case
a file offset of the existing extent is too big. In this case,
the ideal physical block number is fixed in ext4_mb_initialize_context(),
so it's no problem.
reproduce:
# dd if=/dev/zero of=/mnt/mp1/tmp bs=127M count=1 oflag=sync
# dd if=/dev/zero of=/mnt/mp1/file bs=512K count=1 seek=1 oflag=sync
# filefrag -v /mnt/mp1/file
Filesystem type is: ef53
File size of /mnt/mp1/file is 1048576 (256 blocks, blocksize 4096)
ext logical physical expected length flags
0 128 67456 128 eof
/mnt/mp1/file: 2 extents found
# rm -rf /mnt/mp1/tmp
# echo $((512*4096)) > /sys/fs/ext4/loop0/mb_stream_req
# dd if=/dev/zero of=/mnt/mp1/file bs=512K count=1 oflag=sync conv=notrunc
result (linux-2.6.37-rc2 + ext4 patch queue):
# filefrag -v /mnt/mp1/file
Filesystem type is: ef53
File size of /mnt/mp1/file is 1048576 (256 blocks, blocksize 4096)
ext logical physical expected length flags
0 0 33280 128
1 128 67456 33407 128 eof
/mnt/mp1/file: 2 extents found
result(apply this patch):
# filefrag -v /mnt/mp1/file
Filesystem type is: ef53
File size of /mnt/mp1/file is 1048576 (256 blocks, blocksize 4096)
ext logical physical expected length flags
0 0 66560 128
1 128 67456 66687 128 eof
/mnt/mp1/file: 2 extents found
Signed-off-by: Kazuya Mio <k-mio@sx.jp.nec.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Check return value of ext4_journal_get_write_access,
ext4_journal_dirty_metadata and ext4_mark_inode_dirty. Move brelse()
under 'out_stop' to release bh properly in case of journal error.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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ext4_ext_migrate() calls ext4_new_inode() and passes 0 instead of a pointer
to a struct qstr. This patch uses NULL, to make it obvious to the caller
that this was a pointer.
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Where the file pointer is available, use ext4_error_file() instead of
ext4_error_inode().
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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d_path() returns an ERR_PTR and it doesn't return NULL. This is in
ext4_error_file() and no one actually calls ext4_error_file().
Signed-off-by: Dan Carpenter <error27@gmail.com>
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This is a copy and paste error. The intent was to check
"io_page_cachep". We tested "io_page_cachep" earlier.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Reviewed-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Wang Sheng-Hui <crosslonelyover@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Signed-off-by: Wang Sheng-Hui <crosslonelyover@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Any time you see code that tries to add error codes together, you
should want to claw your eyes out...
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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ext4_issue_discard is supposed to be helper for calling discard, however
in case that underlying device does not support discard it prints out
the warning message and clears the DISCARD t_mount_opt flag. Since it
can be (and is) used by others, it should not do anything and let the
caller to handle the error case.
This commit removes warning message and flag setting from
ext4_issue_discard and use it just in place where it is really needed
(release_blocks_on_commit). FITRIM ioctl should not set any flags nor it
should print out warning messages, so get rid of the warning as well.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
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When determining last group through ext4_get_group_no_and_offset() the
result may be wrong in cases when range->start and range-len are too
big, because it may overflow when summing up those two numbers.
Fix that by checking range->len and limit its value to
ext4_blocks_count(). This commit was tested by myself with expected
result.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
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Add new mappings for assist, VAIO, zoom and eject buttons present on
refurbished P, Z and EC models.
Reported-by: Gyorgy Jeney <nog.lkml@gmail.com>
Reported-by: Stephan Mueller <smueller@chronox.de>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging: (44 commits)
hwmon: Support for Dallas Semiconductor DS620
hwmon: driver for Sensirion SHT21 humidity and temperature sensor
hwmon: Add humidity attribute to sysfs ABI
hwmon: sysfs ABI updates
hwmon: (via-cputemp) sync hotplug handling with coretemp/pkgtemp
hwmon: (lm95241) Rewrite to avoid using macros
hwmon: (applesmc) Fix checkpatch errors and fix value range checks
hwmon: (applesmc) Update copyright information
hwmon: (applesmc) Silence driver
hwmon: (applesmc) Simplify feature sysfs handling
hwmon: (applesmc) Dynamic creation of fan files
hwmon: (applesmc) Extract all features generically
hwmon: (applesmc) Handle new temperature format
hwmon: (applesmc) Dynamic creation of temperature files
hwmon: (applesmc) Introduce a register lookup table
hwmon: (applesmc) Use pr_fmt and pr_<level>
hwmon: (applesmc) Relax the severity of device init failure
hwmon: (applesmc) Add MacBookAir3,1(3,2) support
hwmon: (w83627hf) Use pr_fmt and pr_<level>
hwmon: (w83627ehf) Use pr_fmt and pr_<level>
...
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* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: (29 commits)
of/flattree: forward declare struct device_node in of_fdt.h
ipmi: explicitly include of_address.h and of_irq.h
sparc: explicitly cast negative phandle checks to s32
powerpc/405: Fix missing #{address,size}-cells in i2c node
powerpc/5200: dts: refactor dts files
powerpc/5200: dts: Change combatible strings on localbus
powerpc/5200: dts: remove unused properties
powerpc/5200: dts: rename nodes to prepare for refactoring dts files
of/flattree: Update dtc to current mainline.
of/device: Don't register disabled devices
powerpc/dts: fix syntax bugs in bluestone.dts
of: Fixes for OF probing on little endian systems
of: make drivers depend on CONFIG_OF instead of CONFIG_PPC_OF
of/flattree: Add of_flat_dt_match() helper function
of_serial: explicitly include of_irq.h
of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_tree
of/flattree: Reorder unflatten_dt_node
of/flattree: Refactor unflatten_dt_node
of/flattree: Add non-boottime device tree functions
of/flattree: Add Kconfig for EARLY_FLATTREE
...
Fix up trivial conflict in arch/sparc/prom/tree_32.c as per Grant.
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Currently the x86 platform devices are not consistent about selecting
or depending on the LEDs Kconfig variables, and this inconsistency
leads to Kconfig getting upset and refusing to offer LEDs (even on
non-x86 platforms):
drivers/platform/x86/Kconfig:422:error: recursive dependency detected!
drivers/platform/x86/Kconfig:422: symbol EEEPC_WMI depends on ACPI_WMI
drivers/platform/x86/Kconfig:438: symbol ACPI_WMI is selected by ACER_WMI
drivers/platform/x86/Kconfig:18: symbol ACER_WMI depends on LEDS_CLASS
drivers/leds/Kconfig:10: symbol LEDS_CLASS is selected by EEEPC_WMI
Fix this by always selecting rather than depending on the symbols as
slightly more drivers use this approach already and it seems more
user friendly.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
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Fix sparse warning for non-ANSI function declaration:
drivers/platform/x86/sony-laptop.c:1134:35: warning: non-ANSI function declaration of function 'sony_nc_rfkill_update'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
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Fix sparse warning for non-ANSI function declaration:
drivers/platform/x86/intel_ips.c:1477:25: warning: non-ANSI function declaration of function 'ips_link_to_i915_driver'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
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Remove kobject.h from files which don't need it, notably,
sched.h and fs.h.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Remove path.h from sched.h and other files.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen/event: validate irq before get evtchn by irq
xen/fb: fix potential memory leak
xen/fb: fix xenfb suspend/resume race.
xen: disable ACPI NUMA for PV guests
xen/irq: Cleanup the find_unbound_irq
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git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/generic' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen: HVM X2APIC support
apic: Move hypervisor detection of x2apic to hypervisor.h
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git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
slub: Fix a crash during slabinfo -v
tracing/slab: Move kmalloc tracepoint out of inline code
slub: Fix slub_lock down/up imbalance
slub: Fix build breakage in Documentation/vm
slub tracing: move trace calls out of always inlined functions to reduce kernel code size
slub: move slabinfo.c to tools/slub/slabinfo.c
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6
* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6:
Documentation/kbuild: add info that 'choice' can have a symbol name
kbuild: add numeric --set-val option to scripts/config
headers_check: Fix warning text
headers_check: better search for functions in headers
scripts/coccinelle: update for compatability with Coccinelle 0.2.4
tags: put function prototypes back!
Kconfig: fix single letter command in scripts/config
gitignore: add scripts/recordmcount
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6
* 'packaging' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6:
deb-pkg: s/hdr/kernel_headers_/ && s/header/libc_headers_/
deb-pkg: Make deb-pkg generate a seperate linux-libc-dev deb
kbuild: create linux-headers package in deb-pkg
kbuild, deb-pkg: support overriding userland architecture
kbuild, deb-pkg: select userland architecture based on UTS_MACHINE
kbuild, deb-pkg: Fix build with paranoid umask
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