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14 years agofs: brlock vfsmount_lock
Nick Piggin [Tue, 17 Aug 2010 18:37:39 +0000 (04:37 +1000)]
fs: brlock vfsmount_lock

fs: brlock vfsmount_lock

Use a brlock for the vfsmount lock. It must be taken for write whenever
modifying the mount hash or associated fields, and may be taken for read when
performing mount hash lookups.

A new lock is added for the mnt-id allocator, so it doesn't need to take
the heavy vfsmount write-lock.

The number of atomics should remain the same for fastpath rlock cases, though
code would be slightly slower due to per-cpu access. Scalability is not not be
much improved in common cases yet, due to other locks (ie. dcache_lock) getting
in the way. However path lookups crossing mountpoints should be one case where
scalability is improved (currently requiring the global lock).

The slowpath is slower due to use of brlock. On a 64 core, 64 socket, 32 node
Altix system (high latency to remote nodes), a simple umount microbenchmark
(mount --bind mnt mnt2 ; umount mnt2 loop 1000 times), before this patch it
took 6.8s, afterwards took 7.1s, about 5% slower.

Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agofs: scale files_lock
Nick Piggin [Tue, 17 Aug 2010 18:37:38 +0000 (04:37 +1000)]
fs: scale files_lock

fs: scale files_lock

Improve scalability of files_lock by adding per-cpu, per-sb files lists,
protected with an lglock. The lglock provides fast access to the per-cpu lists
to add and remove files. It also provides a snapshot of all the per-cpu lists
(although this is very slow).

One difficulty with this approach is that a file can be removed from the list
by another CPU. We must track which per-cpu list the file is on with a new
variale in the file struct (packed into a hole on 64-bit archs). Scalability
could suffer if files are frequently removed from different cpu's list.

However loads with frequent removal of files imply short interval between
adding and removing the files, and the scheduler attempts to avoid moving
processes too far away. Also, even in the case of cross-CPU removal, the
hardware has much more opportunity to parallelise cacheline transfers with N
cachelines than with 1.

A worst-case test of 1 CPU allocating files subsequently being freed by N CPUs
degenerates to contending on a single lock, which is no worse than before. When
more than one CPU are allocating files, even if they are always freed by
different CPUs, there will be more parallelism than the single-lock case.

Testing results:

On a 2 socket, 8 core opteron, I measure the number of times the lock is taken
to remove the file, the number of times it is removed by the same CPU that
added it, and the number of times it is removed by the same node that added it.

Booting:    locks=  25049 cpu-hits=  23174 (92.5%) node-hits=  23945 (95.6%)
kbuild -j16 locks=2281913 cpu-hits=2208126 (96.8%) node-hits=2252674 (98.7%)
dbench 64   locks=4306582 cpu-hits=4287247 (99.6%) node-hits=4299527 (99.8%)

So a file is removed from the same CPU it was added by over 90% of the time.
It remains within the same node 95% of the time.

Tim Chen ran some numbers for a 64 thread Nehalem system performing a compile.

                throughput
2.6.34-rc2      24.5
+patch          24.9

                us      sys     idle    IO wait (in %)
2.6.34-rc2      51.25   28.25   17.25   3.25
+patch          53.75   18.5    19      8.75

So significantly less CPU time spent in kernel code, higher idle time and
slightly higher throughput.

Single threaded performance difference was within the noise of microbenchmarks.
That is not to say penalty does not exist, the code is larger and more memory
accesses required so it will be slightly slower.

Cc: linux-kernel@vger.kernel.org
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agolglock: introduce special lglock and brlock spin locks
Nick Piggin [Tue, 17 Aug 2010 18:37:37 +0000 (04:37 +1000)]
lglock: introduce special lglock and brlock spin locks

lglock: introduce special lglock and brlock spin locks

This patch introduces "local-global" locks (lglocks). These can be used to:

- Provide fast exclusive access to per-CPU data, with exclusive access to
  another CPU's data allowed but possibly subject to contention, and to provide
  very slow exclusive access to all per-CPU data.
- Or to provide very fast and scalable read serialisation, and to provide
  very slow exclusive serialisation of data (not necessarily per-CPU data).

Brlocks are also implemented as a short-hand notation for the latter use
case.

Thanks to Paul for local/global naming convention.

Cc: linux-kernel@vger.kernel.org
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agotty: fix fu_list abuse
Nick Piggin [Tue, 17 Aug 2010 18:37:36 +0000 (04:37 +1000)]
tty: fix fu_list abuse

tty: fix fu_list abuse

tty code abuses fu_list, which causes a bug in remount,ro handling.

If a tty device node is opened on a filesystem, then the last link to the inode
removed, the filesystem will be allowed to be remounted readonly. This is
because fs_may_remount_ro does not find the 0 link tty inode on the file sb
list (because the tty code incorrectly removed it to use for its own purpose).
This can result in a filesystem with errors after it is marked "clean".

Taking idea from Christoph's initial patch, allocate a tty private struct
at file->private_data and put our required list fields in there, linking
file and tty. This makes tty nodes behave the same way as other device nodes
and avoid meddling with the vfs, and avoids this bug.

The error handling is not trivial in the tty code, so for this bugfix, I take
the simple approach of using __GFP_NOFAIL and don't worry about memory errors.
This is not a problem because our allocator doesn't fail small allocs as a rule
anyway. So proper error handling is left as an exercise for tty hackers.

[ Arguably filesystem's device inode would ideally be divorced from the
driver's pseudo inode when it is opened, but in practice it's not clear whether
that will ever be worth implementing. ]

Cc: linux-kernel@vger.kernel.org
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agofs: cleanup files_lock locking
Nick Piggin [Tue, 17 Aug 2010 18:37:35 +0000 (04:37 +1000)]
fs: cleanup files_lock locking

fs: cleanup files_lock locking

Lock tty_files with a new spinlock, tty_files_lock; provide helpers to
manipulate the per-sb files list; unexport the files_lock spinlock.

Cc: linux-kernel@vger.kernel.org
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agofs: remove extra lookup in __lookup_hash
Nick Piggin [Tue, 17 Aug 2010 18:37:34 +0000 (04:37 +1000)]
fs: remove extra lookup in __lookup_hash

fs: remove extra lookup in __lookup_hash

Optimize lookup for create operations, where no dentry should often be
common-case. In cases where it is not, such as unlink, the added overhead
is much smaller than the removed.

Also, move comments about __d_lookup racyness to the __d_lookup call site.
d_lookup is intuitive; __d_lookup is what needs commenting. So in that same
vein, add kerneldoc comments to __d_lookup and clean up some of the comments:

- We are interested in how the RCU lookup works here, particularly with
  renames. Make that explicit, and point to the document where it is explained
  in more detail.
- RCU is pretty standard now, and macros make implementations pretty mindless.
  If we want to know about RCU barrier details, we look in RCU code.
- Delete some boring legacy comments because we don't care much about how the
  code used to work, more about the interesting parts of how it works now. So
  comments about lazy LRU may be interesting, but would better be done in the
  LRU or refcount management code.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agofs: fs_struct rwlock to spinlock
Nick Piggin [Tue, 17 Aug 2010 18:37:33 +0000 (04:37 +1000)]
fs: fs_struct rwlock to spinlock

fs: fs_struct rwlock to spinlock

struct fs_struct.lock is an rwlock with the read-side used to protect root and
pwd members while taking references to them. Taking a reference to a path
typically requires just 2 atomic ops, so the critical section is very small.
Parallel read-side operations would have cacheline contention on the lock, the
dentry, and the vfsmount cachelines, so the rwlock is unlikely to ever give a
real parallelism increase.

Replace it with a spinlock to avoid one or two atomic operations in typical
path lookup fastpath.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agoapparmor: use task path helpers
Nick Piggin [Tue, 17 Aug 2010 18:37:32 +0000 (04:37 +1000)]
apparmor: use task path helpers

apparmor: use task path helpers

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agofs: dentry allocation consolidation
Nick Piggin [Tue, 17 Aug 2010 18:37:31 +0000 (04:37 +1000)]
fs: dentry allocation consolidation

fs: dentry allocation consolidation

There are 2 duplicate copies of code in dentry allocation in path lookup.
Consolidate them into a single function.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agofs: fix do_lookup false negative
Nick Piggin [Tue, 17 Aug 2010 18:37:30 +0000 (04:37 +1000)]
fs: fix do_lookup false negative

fs: fix do_lookup false negative

In do_lookup, if we initially find no dentry, we take the directory i_mutex and
re-check the lookup. If we find a dentry there, then we revalidate it if
needed. However if that revalidate asks for the dentry to be invalidated, we
return -ENOENT from do_lookup. What should happen instead is an attempt to
allocate and lookup a new dentry.

This is probably not noticed because it is rare. It is only reached if a
concurrent create races in first (in which case, the dentry probably won't be
invalidated anyway), or if the racy __d_lookup has failed due to a
false-negative (which is very rare).

Fix this by removing code and have it use the normal reval path.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agombcache: Limit the maximum number of cache entries
Andreas Gruenbacher [Mon, 16 Aug 2010 17:05:23 +0000 (19:05 +0200)]
mbcache: Limit the maximum number of cache entries

Limit the maximum number of mb_cache entries depending on the number of
hash buckets: if the only limit to the number of cache entries is the
available memory the hash chains can grow very long, taking a long time
to search.

At least partially solves https://bugzilla.lustre.org/show_bug.cgi?id=22771.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agohostfs ->follow_link() braino
Al Viro [Wed, 18 Aug 2010 10:21:10 +0000 (06:21 -0400)]
hostfs ->follow_link() braino

we want the assignment to err done inside the if () to be
visible after it, so (re)declaring err inside if () body
is wrong.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agohostfs: dumb (and usually harmless) tpyo - strncpy instead of strlcpy
Al Viro [Wed, 18 Aug 2010 10:18:57 +0000 (06:18 -0400)]
hostfs: dumb (and usually harmless) tpyo - strncpy instead of strlcpy

... not harmless in this case - we have a string in the end of buffer
already.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agoremove SWRITE* I/O types
Christoph Hellwig [Wed, 11 Aug 2010 15:06:24 +0000 (17:06 +0200)]
remove SWRITE* I/O types

These flags aren't real I/O types, but tell ll_rw_block to always
lock the buffer instead of giving up on a failed trylock.

Instead add a new write_dirty_buffer helper that implements this semantic
and use it from the existing SWRITE* callers.  Note that the ll_rw_block
code had a bug where it didn't promote WRITE_SYNC_PLUG properly, which
this patch fixes.

In the ufs code clean up the helper that used to call ll_rw_block
to mirror sync_dirty_buffer, which is the function it implements for
compound buffers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agokill BH_Ordered flag
Christoph Hellwig [Wed, 11 Aug 2010 15:05:45 +0000 (17:05 +0200)]
kill BH_Ordered flag

Instead of abusing a buffer_head flag just add a variant of
sync_dirty_buffer which allows passing the exact type of write
flag required.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agovfs: update ctime when changing the file's permission by setfacl
Jan Kara [Tue, 17 Aug 2010 10:42:13 +0000 (12:42 +0200)]
vfs: update ctime when changing the file's permission by setfacl

generic_acl_set didn't update the ctime of the file when its permission was
changed.

Steps to reproduce:
 # touch aaa
 # stat -c %Z aaa
 1275289822
 # setfacl -m  'u::x,g::x,o::x' aaa
 # stat -c %Z aaa
 1275289822                         <- unchanged

But, according to the spec of the ctime, vfs must update it.

Port of ext3 patch by Miao Xie <miaox@cn.fujitsu.com>.

CC: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agocramfs: only unlock new inodes
Alexander Shishkin [Tue, 17 Aug 2010 14:08:35 +0000 (17:08 +0300)]
cramfs: only unlock new inodes

Commit 77b8a75f5bb introduced a warning at fs/inode.c:692 unlock_new_inode(),
caused by unlock_new_inode() being called on existing inodes as well.

This patch changes setup_inode() to only call unlock_new_inode() for I_NEW
inodes.

Signed-off-by: Alexander Shishkin <virtuoso@slind.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agofix reiserfs_evict_inode end_writeback second call
Sergey Senozhatsky [Wed, 11 Aug 2010 11:07:01 +0000 (14:07 +0300)]
fix reiserfs_evict_inode end_writeback second call

reiserfs_evict_inode calls end_writeback two times hitting
kernel BUG at fs/inode.c:298 becase inode->i_state is I_CLEAR already.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
14 years agoLinux 2.6.36-rc1
Linus Torvalds [Mon, 16 Aug 2010 00:41:37 +0000 (17:41 -0700)]
Linux 2.6.36-rc1

14 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...
Linus Torvalds [Mon, 16 Aug 2010 00:37:07 +0000 (17:37 -0700)]
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  gcc-4.6: ACPI: fix unused but set variables in ACPI
  ACPI thermal: make procfs I/F depend on CONFIG_ACPI_PROCFS
  ACPI video: make procfs I/F depend on CONFIG_ACPI_PROCFS
  ACPI processor: remove deprecated ACPI procfs I/F
  ACPI power_resource: remove unused procfs I/F
  ACPI: remove deprecated ACPI procfs I/F
  ACPI: introduce drivers/acpi/sysfs.c
  ACPI: introduce module parameter acpi.aml_debug_output
  ACPI: introduce drivers/acpi/debugfs.c
  ACPI, APEI, ERST debug support
  ACPI, APEI, Manage GHES as platform devices
  ACPI, APEI, Rename CPER and GHES severity constants
  ACPI, APEI, Fix a typo of error path of apei_resources_request
  ACPI / ACPICA: Fix reference counting problems with GPE handlers
  ACPI: Add the check of ADR flag in course of finding ACPI handle for PCI device
  ACPI / Sleep: Drop acpi_suspend_finish()
  ACPI / Sleep: Consolidate suspend and hibernation routines
  ACPI / Wakeup: Simplify enabling of wakeup devices
  ACPI / Sleep: Rework enabling wakeup devices
  ACPI / Sleep: Free NVS copy if suspending of devices fails

Fixed up totally buggered "ACPI: fix unused but set variables in ACPI"
patch that doesn't even compile in the merge.

Thanks to Sedat Dilek <sedat.dilek@googlemail.com> for noticing the
breakage before I even pulled.  And a big "Grrr.." at Len for not even
bothering to compile the tree before asking me to pull.

14 years agoMerge git://git.infradead.org/iommu-2.6
Linus Torvalds [Mon, 16 Aug 2010 00:34:20 +0000 (17:34 -0700)]
Merge git://git.infradead.org/iommu-2.6

* git://git.infradead.org/iommu-2.6:
  intel-iommu: Fix 32-bit build warning with __cmpxchg()
  intr-remap: allow disabling source id checking

14 years agoMerge git://git.infradead.org/mtd-2.6
Linus Torvalds [Mon, 16 Aug 2010 00:32:47 +0000 (17:32 -0700)]
Merge git://git.infradead.org/mtd-2.6

* git://git.infradead.org/mtd-2.6:
  mtd/nand_ids: Fix buswidth
  mtd/m25p80: fix test for end of loop
  mtd/m25p80: retlen is never NULL
  MIPS: Fix gen_nand probe structures contents
  gen_nand: Test if nr_chips field is valid
  BFIN: Fix gen_nand probe structures contents
  nand/denali: move all hardware initialization work to denali_hw_init
  nand/denali: Add a page check in denali_read_page & denali_read_page_raw
  nand/denali: use cpu_relax() while waiting for hardware interrupt
  nand/denali: change read_status function method
  nand/denali: Fixed check patch warnings
  ARM: Fix gen_nand probe structures contents
  mtd/nand_base: fix kernel-doc warnings & typos
  nand/denali: use dev_xx debug function to replace nand_dbg_print and some printk
  nand/denali: Fixed handle ECC error bugs
  nand/denali: use iowrite32() to replace denali_write32()
  nand/denali: Fixed probe function bugs

14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Linus Torvalds [Mon, 16 Aug 2010 00:31:43 +0000 (17:31 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  arch/tile: don't validate CROSS_COMPILE needlessly
  arch/tile: export only COMMAND_LINE_SIZE to userspace.
  arch/tile: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN
  arch/tile: Rename the hweight() implementations to __arch_hweight()
  arch/tile: extend syscall ABI to set r1 on return as well.
  arch/tile: Various cleanups.
  arch/tile: support backtracing on TILE-Gx
  arch/tile: Fix a couple of issues with the COMPAT code for TILE-Gx.
  arch/tile: Use separate, better minsec values for clocksource and sched_clock.
  arch/tile: correct a bug in freeing bootmem by VA for the optional second initrd.
  arch: tile: mm: pgtable.c: Removed duplicated #include
  arch: tile: kernel/proc.c Removed duplicated #include
  Add fanotify syscalls to <asm-generic/unistd.h>.
  arch/tile: support new kunmap_atomic() naming convention.
  tile: remove unused ISA_DMA_THRESHOLD define

Conflicts in arch/tile/configs/tile_defconfig (pick the mainline version
with the reduced defconfig).

14 years agoarch/tile: don't validate CROSS_COMPILE needlessly
Chris Metcalf [Sun, 15 Aug 2010 19:01:45 +0000 (15:01 -0400)]
arch/tile: don't validate CROSS_COMPILE needlessly

With this change, the arch/tile Makefile will only check for a valid
combination of CROSS_COMPILE vs "uname -m" for a few common targets
that are typically the ones we get wrong (vmlinux, all, and modules).
The change handles the case of an empty "make" goal like "make all".

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
14 years agomm: fix up some user-visible effects of the stack guard page
Linus Torvalds [Sun, 15 Aug 2010 18:35:52 +0000 (11:35 -0700)]
mm: fix up some user-visible effects of the stack guard page

This commit makes the stack guard page somewhat less visible to user
space. It does this by:

 - not showing the guard page in /proc/<pid>/maps

   It looks like lvm-tools will actually read /proc/self/maps to figure
   out where all its mappings are, and effectively do a specialized
   "mlockall()" in user space.  By not showing the guard page as part of
   the mapping (by just adding PAGE_SIZE to the start for grows-up
   pages), lvm-tools ends up not being aware of it.

 - by also teaching the _real_ mlock() functionality not to try to lock
   the guard page.

   That would just expand the mapping down to create a new guard page,
   so there really is no point in trying to lock it in place.

It would perhaps be nice to show the guard page specially in
/proc/<pid>/maps (or at least mark grow-down segments some way), but
let's not open ourselves up to more breakage by user space from programs
that depends on the exact deails of the 'maps' file.

Special thanks to Henrique de Moraes Holschuh for diving into lvm-tools
source code to see what was going on with the whole new warning.

Reported-and-tested-by: François Valenduc <francois.valenduc@tvcablenet.be
Reported-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
Linus Torvalds [Sun, 15 Aug 2010 18:22:00 +0000 (11:22 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: sound/usb/format: silence uninitialized variable warnings
  MAINTAINERS: Add Ian Lartey as comaintaner for Wolfson devices
  MAINTAINERS: Make Wolfson entry also cover CODEC drivers
  ASoC: Only tweak WM8994 chip configuration on devices up to rev D
  ASoC: Optimise DSP performance for WM8994
  ALSA: hda - Fix dynamic ADC change working again
  ALSA: hda - Restrict PCM parameters per ELD information over HDMI
  sound: oss: sh_dac_audio.c removed duplicated #include

14 years agoMerge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb...
Linus Torvalds [Sun, 15 Aug 2010 18:17:52 +0000 (11:17 -0700)]
Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6

* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
  intel_idle: recognize Lincroft Atom Processor
  intel_idle: no longer EXPERIMENTAL
  intel_idle: disable module support
  intel_idle: add support for Westmere-EX
  intel_idle: delete power_policy modparam, and choose substate functions
  intel_idle: delete substates DEBUG modparam

14 years agoarch/tile: export only COMMAND_LINE_SIZE to userspace.
Chris Metcalf [Sun, 15 Aug 2010 16:14:41 +0000 (12:14 -0400)]
arch/tile: export only COMMAND_LINE_SIZE to userspace.

This fixes a failure in "make headers_check" for tile.
I hadn't realized this file was exported to userspace by default.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
14 years agoarch/tile: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN
Chris Metcalf [Sat, 14 Aug 2010 00:43:39 +0000 (20:43 -0400)]
arch/tile: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN

See commit a6eb9fe105d5de0053b261148cee56c94b4720ca.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
14 years agoMerge branch 'fix/asoc' into for-linus
Takashi Iwai [Sun, 15 Aug 2010 12:34:02 +0000 (14:34 +0200)]
Merge branch 'fix/asoc' into for-linus

14 years agoMerge branch 'fix/hda' into for-linus
Takashi Iwai [Sun, 15 Aug 2010 12:33:56 +0000 (14:33 +0200)]
Merge branch 'fix/hda' into for-linus

14 years agoALSA: sound/usb/format: silence uninitialized variable warnings
Dan Carpenter [Sat, 14 Aug 2010 17:29:53 +0000 (19:29 +0200)]
ALSA: sound/usb/format: silence uninitialized variable warnings

Gcc complains that ret might be used uninitialized:

sound/usb/format.c: In function ‘snd_usb_parse_audio_format’:
sound/usb/format.c:354: warning: ‘ret’ may be used uninitialized in this function
sound/usb/format.c:354: note: ‘ret’ was declared here
sound/usb/format.c:414: warning: ‘ret’ may be used uninitialized in this function
sound/usb/format.c:414: note: ‘ret’ was declared here

I suppose it could be uninitialized if there is ever a UAC_VERSION_3
released. Anyway this patch is worthwhile if only to silence the gcc
warning.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
14 years agoMerge branch 'linus' into release
Len Brown [Sun, 15 Aug 2010 05:06:31 +0000 (01:06 -0400)]
Merge branch 'linus' into release

Conflicts:
drivers/acpi/debug.c

Signed-off-by: Len Brown <len.brown@intel.com>
14 years agogcc-4.6: ACPI: fix unused but set variables in ACPI
Andi Kleen [Tue, 20 Jul 2010 22:18:36 +0000 (15:18 -0700)]
gcc-4.6: ACPI: fix unused but set variables in ACPI

Some minor improvements in error handling, but overall it was mostly dead
code.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoACPI thermal: make procfs I/F depend on CONFIG_ACPI_PROCFS
Zhang Rui [Thu, 15 Jul 2010 02:46:44 +0000 (10:46 +0800)]
ACPI thermal: make procfs I/F depend on CONFIG_ACPI_PROCFS

Mark the ACPI thermal procfs I/F deprecated, because /sys/class/thermal/
is already available and has been working for years w/o any problem.

The ACPI thermal procfs I/F will be removed in 2.6.37.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoACPI video: make procfs I/F depend on CONFIG_ACPI_PROCFS
Zhang Rui [Thu, 15 Jul 2010 02:46:43 +0000 (10:46 +0800)]
ACPI video: make procfs I/F depend on CONFIG_ACPI_PROCFS

Mark ACPI video driver procfs I/F deprecated, including:
/proc/acpi/video/*/info
/proc/acpi/video/*/DOS
/proc/acpi/video/*/ROM
/proc/acpi/video/*/POST
/proc/acpi/video/*/POST_info
/proc/acpi/video/*/*/info
/proc/acpi/video/*/*/state
/proc/acpi/video/*/*/EDID
and
/proc/acpi/video/*/*/brightness, because
1. we already have the sysfs I/F /sysclass/backlight/ as the replacement
of /proc/acpi/video/*/*/brightness.
2. the other procfs I/F is not useful for userspace.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoACPI processor: remove deprecated ACPI procfs I/F
Zhang Rui [Thu, 15 Jul 2010 02:46:41 +0000 (10:46 +0800)]
ACPI processor: remove deprecated ACPI procfs I/F

Remove deprecated ACPI processor procfs I/F, including:
/proc/acpi/processor/CPUX/power
/proc/acpi/processor/CPUX/limit
/proc/acpi/processor/CPUX/info

/proc/acpi/processor/CPUX/throttling still exists,
as we don't have sysfs I/F available for now.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoACPI power_resource: remove unused procfs I/F
Zhang Rui [Thu, 15 Jul 2010 02:46:38 +0000 (10:46 +0800)]
ACPI power_resource: remove unused procfs I/F

Remove unused ACPI power procfs I/F.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoACPI: remove deprecated ACPI procfs I/F
Zhang Rui [Thu, 15 Jul 2010 02:46:33 +0000 (10:46 +0800)]
ACPI: remove deprecated ACPI procfs I/F

Rmove deprecated ACPI procfs I/F, including
/proc/acpi/debug_layer
/proc/acpi/debug_level
/proc/acpi/info
/proc/acpi/dsdt
/proc/acpi/fadt
/proc/acpi/sleep

because the sysfs I/F is already available
and has been working well for years.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoACPI: introduce drivers/acpi/sysfs.c
Zhang Rui [Thu, 15 Jul 2010 02:46:30 +0000 (10:46 +0800)]
ACPI: introduce drivers/acpi/sysfs.c

Introduce drivers/acpi/sysfs.c.

code for ACPI sysfs I/F, including
#ifdef ACPI_DEBUG
/sys/module/acpi/parameters/debug_layer
/sys/module/acpi/parameters/debug_level
/sys/module/acpi/parameters/trace_method_name
/sys/module/acpi/parameters/trace_debug_layer
/sys/module/acpi/parameters/trace_debug_level
/sys/module/acpi/parameters/trace_state
#endif
/sys/module/acpi/parameters/acpica_version
/sys/firmware/acpi/tables/
/sys/firmware/acpi/interrupts/
is moved to this file.

No function change in this patch.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoMerge branch 'acpica-gpe' into release
Len Brown [Sun, 15 Aug 2010 04:25:40 +0000 (00:25 -0400)]
Merge branch 'acpica-gpe' into release

14 years agoMerge branch 'bugzilla-16422' into release
Len Brown [Sun, 15 Aug 2010 03:57:32 +0000 (23:57 -0400)]
Merge branch 'bugzilla-16422' into release

14 years agoMerge branch 'procfs-cleanup' into release
Len Brown [Sun, 15 Aug 2010 03:55:57 +0000 (23:55 -0400)]
Merge branch 'procfs-cleanup' into release

14 years agoMerge branch 'apei' into release
Len Brown [Sun, 15 Aug 2010 03:55:47 +0000 (23:55 -0400)]
Merge branch 'apei' into release

14 years agoMerge branch 'nvs' into release
Len Brown [Sun, 15 Aug 2010 03:55:44 +0000 (23:55 -0400)]
Merge branch 'nvs' into release

14 years agoACPI: introduce module parameter acpi.aml_debug_output
Zhang Rui [Thu, 15 Jul 2010 02:46:17 +0000 (10:46 +0800)]
ACPI: introduce module parameter acpi.aml_debug_output

Introduce module parameter acpi.aml_debug_output.

With acpi.aml_debug_output set, we can get AML debug object output
(Store (AAA, Debug)), even with CONFIG_ACPI_DEBUG cleared.

Together with the runtime custom method mechanism,
we can debug AML code problems without rebuilding the kernel.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoACPI: introduce drivers/acpi/debugfs.c
Zhang Rui [Thu, 15 Jul 2010 02:46:15 +0000 (10:46 +0800)]
ACPI: introduce drivers/acpi/debugfs.c

Introduce drivers/acpi/debugfs.c.

Code for ACPI debugfs I/F,
i.e. /sys/kernel/debug/acpi/custom_method,
is moved to this file.

And make ACPI debugfs always built in,
even if CONFIG_ACPI_DEBUG is cleared.

BTW:this adds about 400bytes code to ACPI, when
CONFIG_ACPI_DEBUG is cleared.

[uaccess.h build fix from Andrew Morton <akpm@linux-foundation.org>]

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agointel_idle: recognize Lincroft Atom Processor
Arjan van de Ven [Thu, 22 Jul 2010 03:42:25 +0000 (23:42 -0400)]
intel_idle: recognize Lincroft Atom Processor

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoACPI, APEI, ERST debug support
Huang Ying [Thu, 12 Aug 2010 03:55:17 +0000 (11:55 +0800)]
ACPI, APEI, ERST debug support

This patch adds debugging/testing support to ERST. A misc device is
implemented to export raw ERST read/write/clear etc operations to user
space. With this patch, we can add ERST testing support to
linuxfirmwarekit ISO (linuxfirmwarekit.org) to verify the kernel
support and the firmware implementation.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/sam/cleanup
Linus Torvalds [Sat, 14 Aug 2010 23:21:50 +0000 (16:21 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/cleanup

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/cleanup:
  defconfig reduction
  kbuild: drop unifdef-y support
  archs: replace unifdef-y with header-y
  include: replace unifdef-y with header-y

14 years agofusion: add function parameter names to kernel-doc
Randy Dunlap [Sat, 14 Aug 2010 20:05:57 +0000 (13:05 -0700)]
fusion: add function parameter names to kernel-doc

Fix fusion missing kernel-doc:

  Warning(drivers/message/fusion/mptbase.c:649): No description found for parameter 'func_name'
  Warning(drivers/message/fusion/mptbase.c:8010): No description found for parameter 'cb_idx'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agofs/dcache: fix function param name in kernel-doc
Randy Dunlap [Sat, 14 Aug 2010 20:05:31 +0000 (13:05 -0700)]
fs/dcache: fix function param name in kernel-doc

Fix parameter name in kernel-doc notation (causes a warning).

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agofusion: fix non-kernel-doc comment block
Randy Dunlap [Sat, 14 Aug 2010 20:05:50 +0000 (13:05 -0700)]
fusion: fix non-kernel-doc comment block

Fix comment begin notation not to look like kernel-doc
since it's not.  Removes kernel-doc warnings.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agomm/page-writeback: fix non-kernel-doc function comments
Randy Dunlap [Sat, 14 Aug 2010 20:05:17 +0000 (13:05 -0700)]
mm/page-writeback: fix non-kernel-doc function comments

Remove leading /** from non-kernel-doc function comments to prevent
kernel-doc warnings.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoDocumentation: move SCSI parameters to their own text file
Randy Dunlap [Sat, 14 Aug 2010 19:36:14 +0000 (12:36 -0700)]
Documentation: move SCSI parameters to their own text file

Move SCSI parameters from kernel-parameters.txt to their own text file.

This continues a trend of moving non-core parameters out of
kernel-parameters.txt.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMerge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelv...
Linus Torvalds [Sat, 14 Aug 2010 21:57:58 +0000 (14:57 -0700)]
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: (22 commits)
  hwmon: (via-cputemp) Remove bogus "SHOW" global variable
  hwmon: jc42 depends on I2C
  hwmon: (pc87427) Add a maintainer
  hwmon: (pc87427) Move sysfs file removal to a separate function
  hwmon: (pc87427) Add temperature monitoring support
  hwmon: (pc87427) Add support for the second logical device
  hwmon: (pc87427) Add support for manual fan speed control
  hwmon: (pc87427) Minor style cleanups
  hwmon: (pc87427) Handle disabled fan inputs properly
  hwmon: (w83627ehf) Add support for W83667HG-B
  hwmon: (w83627ehf) Driver cleanup
  hwmon: Add driver for SMSC EMC2103 temperature monitor and fan controller
  hwmon: Remove in[0-*]_fault from sysfs-interface
  hwmon: Add 4 current alarm/beep attributes to sysfs-interface
  hwmon: Add 3 critical limit attributes to sysfs-interface
  hwmon: (asc7621) Clean up and improve detect function
  hwmon: (it87) Export labels for internal sensors
  hwmon: (lm75) Add suspend/resume feature
  hwmon: (emc1403) Add power support
  hwmon: (ltc4245) Expose all GPIO pins as analog voltages
  ...

14 years agodefconfig reduction
Sam Ravnborg [Sat, 14 Aug 2010 20:05:58 +0000 (22:05 +0200)]
defconfig reduction

Use the defconfig files generated by "make savedefconfig" for
remaining defconfig files.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
14 years agokbuild: drop unifdef-y support
Sam Ravnborg [Sat, 14 Aug 2010 08:22:58 +0000 (10:22 +0200)]
kbuild: drop unifdef-y support

unifdef-y is not used anymore - drop remaining references

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
14 years agoarchs: replace unifdef-y with header-y
Sam Ravnborg [Sat, 14 Aug 2010 08:20:19 +0000 (10:20 +0200)]
archs: replace unifdef-y with header-y

unifdef-y and header-y have same semantic, so drop unifdef-y

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
14 years agoinclude: replace unifdef-y with header-y
Sam Ravnborg [Sat, 14 Aug 2010 08:15:12 +0000 (10:15 +0200)]
include: replace unifdef-y with header-y

unifdef-y and header-y has same semantic.
So there is no need to have both.

Drop the unifdef-y variant and sort all lines again

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
14 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
Linus Torvalds [Sat, 14 Aug 2010 19:34:34 +0000 (12:34 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (28 commits)
  [SCSI] qla4xxx: fix compilation warning
  [SCSI] make error handling more robust in the face of reservations
  [SCSI] tgt: fix warning
  [SCSI] drivers/message/fusion: Adjust confusing if indentation
  [SCSI] Return NEEDS_RETRY for eh commands with status BUSY
  [SCSI] ibmvfc: Driver version 1.0.9
  [SCSI] ibmvfc: Fix terminate_rport_io
  [SCSI] ibmvfc: Fix rport add/delete race resulting in oops
  [SCSI] lpfc 8.3.16: Change LPFC driver version to 8.3.16
  [SCSI] lpfc 8.3.16: FCoE Discovery and Failover Fixes
  [SCSI] lpfc 8.3.16: SLI Additions, updates, and code cleanup
  [SCSI] pm8001: introduce missing kfree
  [SCSI] qla4xxx: Update driver version to 5.02.00-k3
  [SCSI] qla4xxx: Added AER support for ISP82xx
  [SCSI] qla4xxx: Handle outstanding mbx cmds on hung f/w scenarios
  [SCSI] qla4xxx: updated mbx_sys_info struct to sync with FW 4.6.x
  [SCSI] qla4xxx: clear AF_DPC_SCHEDULED flage when exit from do_dpc
  [SCSI] qla4xxx: Stop firmware before doing init firmware.
  [SCSI] qla4xxx: Use the correct request queue.
  [SCSI] qla4xxx: set correct value in sess->recovery_tmo
  ...

14 years agohwmon: (via-cputemp) Remove bogus "SHOW" global variable
H. Peter Anvin [Sat, 14 Aug 2010 19:09:02 +0000 (21:09 +0200)]
hwmon: (via-cputemp) Remove bogus "SHOW" global variable

The via-cputemp hwmon driver was probably intending "typedef enum {
... } SHOW;", but the "typedef" was missing creating a global variable
named "SHOW".  There is absolutely no reason to have this in the
global namespace.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Acked-by: Harald Welte <HaraldWelte@viatech.com>
Cc: Juerg Haefliger <juergh@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: jc42 depends on I2C
Randy Dunlap [Sat, 14 Aug 2010 19:09:01 +0000 (21:09 +0200)]
hwmon: jc42 depends on I2C

jc42 uses i2c interfaces, so it should depend on I2C.

drivers/hwmon/jc42.c:426: error: implicit declaration of function 'i2c_check_functionality'
drivers/hwmon/jc42.c:521: error: implicit declaration of function 'i2c_smbus_read_word_data'
drivers/hwmon/jc42.c:529: error: implicit declaration of function 'i2c_smbus_write_word_data'
drivers/hwmon/jc42.c:580: error: implicit declaration of function 'i2c_add_driver'
drivers/hwmon/jc42.c:585: error: implicit declaration of function 'i2c_del_driver'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: (pc87427) Add a maintainer
Jean Delvare [Sat, 14 Aug 2010 19:09:00 +0000 (21:09 +0200)]
hwmon: (pc87427) Add a maintainer

As I made significant changes to the pc87427 driver, I'll be
maintaining it for the year to come.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: (pc87427) Move sysfs file removal to a separate function
Jean Delvare [Sat, 14 Aug 2010 19:09:00 +0000 (21:09 +0200)]
hwmon: (pc87427) Move sysfs file removal to a separate function

The sysfs file removal code is the same in the probe error path and in
the remove function, so move it to a separate function to avoid code
duplication.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
14 years agohwmon: (pc87427) Add temperature monitoring support
Jean Delvare [Sat, 14 Aug 2010 19:08:59 +0000 (21:08 +0200)]
hwmon: (pc87427) Add temperature monitoring support

Add support for the 6 temperature monitoring channels of the PC87427.
Note that the sensors resolution can vary, and I couldn't find a way
to figure it out, so we might have to compensate in user-space.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
14 years agohwmon: (pc87427) Add support for the second logical device
Jean Delvare [Sat, 14 Aug 2010 19:08:58 +0000 (21:08 +0200)]
hwmon: (pc87427) Add support for the second logical device

The second logical device contains the voltage and temperature
registers. We have to extend the driver to support a second logical
device before we can add support for these features.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
14 years agohwmon: (pc87427) Add support for manual fan speed control
Jean Delvare [Sat, 14 Aug 2010 19:08:58 +0000 (21:08 +0200)]
hwmon: (pc87427) Add support for manual fan speed control

Add initial support for PWM outputs of the PC87427 Super-I/O chip.
Only mode change and manual fan speed control are supported. Automatic
mode configuration isn't supported, and won't be until at least one
board is known, which makes uses of the PWM outputs.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
14 years agohwmon: (pc87427) Minor style cleanups
Jean Delvare [Sat, 14 Aug 2010 19:08:57 +0000 (21:08 +0200)]
hwmon: (pc87427) Minor style cleanups

Follow the best practice of the day.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
14 years agohwmon: (pc87427) Handle disabled fan inputs properly
Jean Delvare [Sat, 14 Aug 2010 19:08:56 +0000 (21:08 +0200)]
hwmon: (pc87427) Handle disabled fan inputs properly

Most fan input pins of the PC87427 can have alternate functions.
Update the driver to check the configuration register and only support
fan inputs which are really used for fan monitoring.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
14 years agohwmon: (w83627ehf) Add support for W83667HG-B
Guenter Roeck [Sat, 14 Aug 2010 19:08:55 +0000 (21:08 +0200)]
hwmon: (w83627ehf) Add support for W83667HG-B

Add support for W83667HG-B (very similar to the W83667HG).

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: (w83627ehf) Driver cleanup
Guenter Roeck [Sat, 14 Aug 2010 19:08:55 +0000 (21:08 +0200)]
hwmon: (w83627ehf) Driver cleanup

- Moved fan pwm register array pointers into per-instance data.
- Only read fan pwm data for installed/supported fans.
- Update fan max output and fan step output information from data in
  registers.
- Create max_output and step_output attribute files only if respective
  fan pwm registers exist.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: Add driver for SMSC EMC2103 temperature monitor and fan controller
Steve Glendinning [Sat, 14 Aug 2010 19:08:54 +0000 (21:08 +0200)]
hwmon: Add driver for SMSC EMC2103 temperature monitor and fan controller

SMSC's EMC2103 family of temperature/fan controllers have 1
onboard and up to 3 external temperature sensors, and allow
closed-loop control of one fan.  This patch adds support for
them.

Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: Remove in[0-*]_fault from sysfs-interface
Jean Delvare [Sat, 14 Aug 2010 19:08:54 +0000 (21:08 +0200)]
hwmon: Remove in[0-*]_fault from sysfs-interface

Fault files are for hardware failures that can be reported. So far
we've seen chips reporting such failures for temperature sensors and
fans, but not for voltages. Remove in[0-*]_fault for now. It can be
added back later if really needed, but I doubt it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
14 years agohwmon: Add 4 current alarm/beep attributes to sysfs-interface
Guenter Roeck [Sat, 14 Aug 2010 19:08:53 +0000 (21:08 +0200)]
hwmon: Add 4 current alarm/beep attributes to sysfs-interface

Add currX_alarm, currX_min_alarm, currX_max_alarm and currX_beep
attributes to the hwmon sysfs API.

currX_min_alarm and currX_max_alarm are already supported by the LTC4215
and LTC4245 drivers. currX_alarm is supported by the LTC4261 driver.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: Add 3 critical limit attributes to sysfs-interface
Guenter Roeck [Sat, 14 Aug 2010 19:08:52 +0000 (21:08 +0200)]
hwmon: Add 3 critical limit attributes to sysfs-interface

Added _lcrit and _crit to voltage attributes.
Added _lcrit to temperature attributes.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: (asc7621) Clean up and improve detect function
Jean Delvare [Sat, 14 Aug 2010 19:08:52 +0000 (21:08 +0200)]
hwmon: (asc7621) Clean up and improve detect function

* The dev variable is never used.
* Detect functions only need to set info->type, not client->name.
* Include the device address in the log message.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: George Joseph <george.joseph@fairview5.com>
Cc: Ken Milmore <ken.milmore@googlemail.com>
14 years agohwmon: (it87) Export labels for internal sensors
Jean Delvare [Sat, 14 Aug 2010 19:08:50 +0000 (21:08 +0200)]
hwmon: (it87) Export labels for internal sensors

Some voltage sensors can be wired internally to the IT87xxF chip's own
power supply channels. In that case, we can inform user-space that the
wiring is known by exporting proper labels for these sensors.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: (lm75) Add suspend/resume feature
Shubhrajyoti Datta [Sat, 14 Aug 2010 19:08:50 +0000 (21:08 +0200)]
hwmon: (lm75) Add suspend/resume feature

There is a shutdown feature at suspend it can be enabled to
reduce current consumption and resume it can be switched off.

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti@ti.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: (emc1403) Add power support
Alan Cox [Sat, 14 Aug 2010 19:08:49 +0000 (21:08 +0200)]
hwmon: (emc1403) Add power support

Add back the power interface we lost due to a slight misunderstanding of
the maintainers wishes.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: (ltc4245) Expose all GPIO pins as analog voltages
Ira W. Snyder [Sat, 14 Aug 2010 19:08:49 +0000 (21:08 +0200)]
hwmon: (ltc4245) Expose all GPIO pins as analog voltages

Add support for exposing all GPIO pins as analog voltages. Though this is
not an ideal use of the chip, some hardware engineers may decide that the
LTC4245 meets their design requirements when studying the datasheet.

The GPIO pins are sampled in round-robin fashion, meaning that a slow
reader will see stale data. A userspace application can detect this,
because it will get -EAGAIN when reading from a sysfs file which contains
stale data.

Users can choose to use this feature on a per-chip basis by using either
platform data or the OF device tree (where applicable).

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agohwmon: (pc87360) Fix device resource declaration
Jean Delvare [Sat, 14 Aug 2010 19:08:48 +0000 (21:08 +0200)]
hwmon: (pc87360) Fix device resource declaration

It's not OK to call platform_device_add_resources() multiple times
in a row. Despite its name, this functions sets the resources, it
doesn't add them. So we have to prepare an array with all the
resources, and then call platform_device_add_resources() once.

Before this fix, only the last I/O resource would be actually
registered. The other I/O resources were leaked.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Jim Cromie <jim.cromie@gmail.com>
Cc: stable@kernel.org
14 years agohwmon: (k8temp) Adjust confusing if indentation
Julia Lawall [Sat, 14 Aug 2010 19:08:47 +0000 (21:08 +0200)]
hwmon: (k8temp) Adjust confusing if indentation

Move the if(err) statement after the if into the if branch indicated by its
indentation.  The preceding if(err) test implies that err cannot be nonzero
unless the if branch is taken.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r disable braces5@
position p1,p2;
statement S1,S2;
@@

(
if (...) { ... }
|
if (...) S1@p1 S2@p2
)

@script:python@
p1 << r.p1;
p2 << r.p2;
@@

if (p1[0].column == p2[0].column):
 cocci.print_main("branch",p4)
 cocci.print_secs("after",p5)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
14 years agoMerge branch 'for-linus/samsung-2635' of git://git.fluff.org/bjdooks/linux
Linus Torvalds [Sat, 14 Aug 2010 18:59:44 +0000 (11:59 -0700)]
Merge branch 'for-linus/samsung-2635' of git://git.fluff.org/bjdooks/linux

* 'for-linus/samsung-2635' of git://git.fluff.org/bjdooks/linux:
  DMAENGINE: correct PL080 register header file
  ARM: SAMSUNG: Fix on build warning about dependency in Kconfig
  ARM: SMDK6410: Make virtual screen twice depth of real
  ARM: S3C64XX: Update consistent DMA size to 8MiB
  ARM: S3C64XX: Add audio support to SmartQ
  ARM: S3C64XX: Framebuffer fix for SmartQ5
  ARM: S3C64XX: Set wifi and iNAND as permanently connected SD devices on SmartQ boards
  ARM: S3C64XX: Move SmartQ LCD control platform definition to shared file
  ARM: mach-real6410: add sdhc device support
  ARM: mach-real6410: add dm9000 ethernet support for mach-real6410
  ARM: S3C64XX: Support for Real6410

Fix up trivial conflicts in arch/arm/mach-s3c64xx/mach-smartq5.c
("remove pixclock" vs "Framebuffer fix for SmartQ5")

14 years agoMerge branch 'for-linus/i2c-2636' of git://git.fluff.org/bjdooks/linux
Linus Torvalds [Sat, 14 Aug 2010 18:57:54 +0000 (11:57 -0700)]
Merge branch 'for-linus/i2c-2636' of git://git.fluff.org/bjdooks/linux

* 'for-linus/i2c-2636' of git://git.fluff.org/bjdooks/linux:
  i2c/nuc900: add i2c driver support for nuc900
  i2c: Enable NXP LPC support in Kconfig
  i2c-pxa: fix compiler warning, due to missing const
  i2c: davinci: bus recovery procedure to clear the bus
  i2c: davinci: Add cpufreq support
  i2c: davinci: Add suspend/resume support
  i2c: davinci: Add helper functions for power management
  i2c: davinci: misc. cleanups: remove MOD_REG_BIT and IO_ADDRESS usage
  i2c: davinci: Fix smbus Oops with AIC33 usage

14 years agoDocumentation: DMA-API-HOWTO.txt: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN
FUJITA Tomonori [Sat, 14 Aug 2010 07:36:17 +0000 (16:36 +0900)]
Documentation: DMA-API-HOWTO.txt: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN

ARCH_KMALLOC_MINALIGN was renamed to ARCH_DMA_MINALIGN (the commit
a6eb9fe105d5de0053b261148cee56c94b4720ca).

ARCH_DMA_MINALIGN must be defined instead of ARCH_KMALLOC_MINALIGN to
ensure that kmalloc'ed buffer is DMA-safe.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agoMerge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6
Linus Torvalds [Sat, 14 Aug 2010 18:54:09 +0000 (11:54 -0700)]
Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6

* 'next-spi' of git://git.secretlab.ca/git/linux-2.6:
  spi/amba_pl022: Fix probe and remove hook section annotations.
  spi/mpc5121: change annotations for probe and remove functions
  spi/bitbang: reinitialize transfer parameters for every message
  spi/spi-gpio: add support for controllers without MISO or MOSI pin
  spi/bitbang: add support for SPI_MASTER_NO_{TX, RX} modes
  SPI100k: Fix 8-bit and RX-only transfers
  spi/mmc_spi: mmc_spi adaptations for SPI bus locking API
  spi/mmc_spi: SPI bus locking API, using mutex

Fix trivial conflict in drivers/spi/mpc512x_psc_spi.c due to 'struct
of_device' => 'struct platform_device' rename and __init/__exit to
__devinit/__devexit fix.

14 years agomm: fix page table unmap for stack guard page properly
Linus Torvalds [Sat, 14 Aug 2010 18:44:56 +0000 (11:44 -0700)]
mm: fix page table unmap for stack guard page properly

We do in fact need to unmap the page table _before_ doing the whole
stack guard page logic, because if it is needed (mainly 32-bit x86 with
PAE and CONFIG_HIGHPTE, but other architectures may use it too) then it
will do a kmap_atomic/kunmap_atomic.

And those kmaps will create an atomic region that we cannot do
allocations in.  However, the whole stack expand code will need to do
anon_vma_prepare() and vma_lock_anon_vma() and they cannot do that in an
atomic region.

Now, a better model might actually be to do the anon_vma_prepare() when
_creating_ a VM_GROWSDOWN segment, and not have to worry about any of
this at page fault time.  But in the meantime, this is the
straightforward fix for the issue.

See https://bugzilla.kernel.org/show_bug.cgi?id=16588 for details.

Reported-by: Wylda <wylda@volny.cz>
Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Reported-by: Mike Pagano <mpagano@gentoo.org>
Reported-by: François Valenduc <francois.valenduc@tvcablenet.be>
Tested-by: Ed Tomlinson <edt@aei.ca>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Greg KH <gregkh@suse.de>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
14 years agointel_idle: no longer EXPERIMENTAL
Len Brown [Sat, 14 Aug 2010 18:44:08 +0000 (14:44 -0400)]
intel_idle: no longer EXPERIMENTAL

This is a fully supported driver.

Signed-off-by: Len Brown <len.brown@intel.com>
14 years agointel_idle: disable module support
Len Brown [Sat, 14 Aug 2010 18:40:36 +0000 (14:40 -0400)]
intel_idle: disable module support

Right now the module capability is cauing more trouble
than it is worth.  At least one distro built intel_idle as a module
where it lost the init race with ACPI, making it useless.

Make intel_idle bool so that if you select it, you will use it.

We can restore module capability after cpuidle is enhanced
to handle run-time changing of idle drivers.

Signed-off-by: Len Brown <len.brown@intel.com>
14 years agoMerge branch 'for-2636/s3c64xx' into for-linus/samsung-2635
Ben Dooks [Sat, 14 Aug 2010 15:34:38 +0000 (16:34 +0100)]
Merge branch 'for-2636/s3c64xx' into for-linus/samsung-2635

14 years agoDMAENGINE: correct PL080 register header file
Linus Walleij [Mon, 9 Aug 2010 10:47:52 +0000 (12:47 +0200)]
DMAENGINE: correct PL080 register header file

This PL008 among all other variables named PL080 doesn't seem
right. Fix it. Also add some missing defined that I use in the
new PL08x driver.

Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
14 years agoARM: SAMSUNG: Fix on build warning about dependency in Kconfig
Kukjin Kim [Fri, 13 Aug 2010 05:38:52 +0000 (14:38 +0900)]
ARM: SAMSUNG: Fix on build warning about dependency in Kconfig

This patch fixes on following build warning.

warning: (PLAT_S5P && (ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PC100 ||
     ARCH_S5PV210 || ARCH_S5PV310) || ARCH_S3C64XX && <choice>)
     selects PLAT_SAMSUNG which has unmet direct dependencies
     (ARCH_S3C2410 || ARCH_S3C24A0 || ARCH_S3C64XX)

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
14 years agoARM: SMDK6410: Make virtual screen twice depth of real
Ben Dooks [Mon, 26 Jul 2010 09:56:40 +0000 (10:56 +0100)]
ARM: SMDK6410: Make virtual screen twice depth of real

For situations where double buffering is needed (such as the
current Android) make the screen virtual y size twice the
LCD size so that there is space for a second screen that
can be switched to.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
14 years agoARM: S3C64XX: Update consistent DMA size to 8MiB
Ben Dooks [Mon, 26 Jul 2010 09:54:00 +0000 (10:54 +0100)]
ARM: S3C64XX: Update consistent DMA size to 8MiB

Change the area available for consitent DMA allocations from the
default to 8MiB to allow drivers such as the framebuffer to get
more memory (for situations where larger virtual screen resolutions
are needed).

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
14 years agoARM: S3C64XX: Add audio support to SmartQ
Maurus Cuelenaere [Fri, 13 Aug 2010 19:17:59 +0000 (21:17 +0200)]
ARM: S3C64XX: Add audio support to SmartQ

This adds the I²C board information for the WM8987 used in the SmartQ as audio
codec and adds the I²C/I²S platform drivers.

Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
14 years agoARM: S3C64XX: Framebuffer fix for SmartQ5
Patrick Georgi [Fri, 13 Aug 2010 19:17:56 +0000 (21:17 +0200)]
ARM: S3C64XX: Framebuffer fix for SmartQ5

The following change makes the framebuffer work on SmartQ5. There are
still some problems with ADC, so this patch alone won't make the device
run (or even give a working fb), but it's one issue less to think about.

Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
14 years agoARM: S3C64XX: Set wifi and iNAND as permanently connected SD devices on SmartQ boards
Maurus Cuelenaere [Fri, 13 Aug 2010 19:17:54 +0000 (21:17 +0200)]
ARM: S3C64XX: Set wifi and iNAND as permanently connected SD devices on SmartQ boards

This patch changes the platform data definitions of the wifi and iNAND chip on
the SmartQ 5 and 7 to indicate that they don't have a CD line available and are
thus hard-wired to the SDHCI data lines.

Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
14 years agoARM: S3C64XX: Move SmartQ LCD control platform definition to shared file
Maurus Cuelenaere [Fri, 13 Aug 2010 19:17:52 +0000 (21:17 +0200)]
ARM: S3C64XX: Move SmartQ LCD control platform definition to shared file

This shares the common LCD control platform definition used in the SmartQ 5 and
7. This also corrects it as a GPIO bitbanged SPI device instead of an I²C one,
which was wrong.

Signed-off-by: Maurus Cuelenaere <mcuelenaere@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
14 years agoARM: mach-real6410: add sdhc device support
Darius Augulis [Sun, 1 Aug 2010 22:39:25 +0000 (01:39 +0300)]
ARM: mach-real6410: add sdhc device support

Register SHDCI devices

Signed-off-by: Darius Augulis <augulis.darius@gmail.com>
[ben-linux@fluff.org: rewrite header[
Signed-off-by: Ben Dooks <ben-linux@fluff.org>