GitHub/MotorolaMobilityLLC/kernel-slsi.git
13 years agodm snapshot: remove unused dm_snapshot queued_bios_work
Tejun Heo [Thu, 13 Jan 2011 19:59:56 +0000 (19:59 +0000)]
dm snapshot: remove unused dm_snapshot queued_bios_work

dm_snapshot->queued_bios_work isn't used.  Remove ->queued_bios[_work]
from dm_snapshot structure, the flush_queued_bios work function and
ksnapd workqueue.

The DM snapshot changes that were going to use the ksnapd workqueue were
either superseded (fix for origin write races) or never completed
(deallocation of invalid snapshot's memory via workqueue).

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm ioctl: suppress needless warning messages
Milan Broz [Thu, 13 Jan 2011 19:59:55 +0000 (19:59 +0000)]
dm ioctl: suppress needless warning messages

The device-mapper should not send warning messages to syslog
if a device is not found. This can be done by userspace
according to the returned dm-ioctl error code.

So move these messages to debug level and use rate limiting
to not flood syslog.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm crypt: add loop aes iv generator
Milan Broz [Thu, 13 Jan 2011 19:59:55 +0000 (19:59 +0000)]
dm crypt: add loop aes iv generator

This patch adds a compatible implementation of the block
chaining mode used by the Loop-AES block device encryption
system (http://loop-aes.sourceforge.net/) designed
by Jari Ruusu.

It operates on full 512 byte sectors and uses CBC
with an IV derived from the sector number, the data and
optionally extra IV seed.

This means that after CBC decryption the first block of sector
must be tweaked according to decrypted data.

Loop-AES can use three encryption schemes:
 version 1: is plain aes-cbc mode (already compatible)
 version 2: uses 64 multikey scheme with own IV generator
 version 3: the same as version 2 with additional IV seed
            (it uses 65 keys, last key is used as IV seed)

The IV generator is here named lmk (Loop-AES multikey)
and for the cipher specification looks like: aes:64-cbc-lmk

Version 2 and 3 is recognised according to length
of provided multi-key string (which is just hexa encoded
"raw key" used in original Loop-AES ioctl).

Configuration of the device and decoding key string will
be done in userspace (cryptsetup).
(Loop-AES stores keys in gpg encrypted file, raw keys are
output of simple hashing of lines in this file).

Based on an implementation by Max Vozeler:
  http://article.gmane.org/gmane.linux.kernel.cryptoapi/3752/

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
CC: Max Vozeler <max@hinterhof.net>
13 years agodm crypt: add multi key capability
Milan Broz [Thu, 13 Jan 2011 19:59:54 +0000 (19:59 +0000)]
dm crypt: add multi key capability

This patch adds generic multikey handling to be used
in following patch for Loop-AES mode compatibility.

This patch extends mapping table to optional keycount and
implements generic multi-key capability.

With more keys defined the <key> string is divided into
several <keycount> sections and these are used for tfms.

The tfm is used according to sector offset
(sector 0->tfm[0], sector 1->tfm[1], sector N->tfm[N modulo keycount])
(only power of two values supported for keycount here).

Because of tfms per-cpu allocation, this mode can be take
a lot of memory on large smp systems.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: Max Vozeler <max@hinterhof.net>
13 years agodm crypt: add post iv call to iv generator
Milan Broz [Thu, 13 Jan 2011 19:59:54 +0000 (19:59 +0000)]
dm crypt: add post iv call to iv generator

IV (initialisation vector) can in principle depend not only
on sector but also on plaintext data (or other attributes).

Change IV generator interface to work directly with dmreq
structure to allow such dependence in generator.

Also add post() function which is called after the crypto
operation.

This allows tricky modification of decrypted data or IV
internals.

In asynchronous mode the post() can be called after
ctx->sector count was increased so it is needed
to add iv_sector copy directly to dmreq structure.
(N.B. dmreq always include only one sector in scatterlists)

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm crypt: use io thread for reads only if mempool exhausted
Milan Broz [Thu, 13 Jan 2011 19:59:53 +0000 (19:59 +0000)]
dm crypt: use io thread for reads only if mempool exhausted

If there is enough memory, code can directly submit bio
instead queing this operation in separate thread.

Try to alloc bio clone with GFP_NOWAIT and only if it
fails use separate queue (map function cannot block here).

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm crypt: scale to multiple cpus
Andi Kleen [Thu, 13 Jan 2011 19:59:53 +0000 (19:59 +0000)]
dm crypt: scale to multiple cpus

Currently dm-crypt does all the encryption work for a single dm-crypt
mapping in a single workqueue. This does not scale well when multiple
CPUs are submitting IO at a high rate. The single CPU running the single
thread cannot keep up with the encryption and encrypted IO performance
tanks.

This patch changes the crypto workqueue to be per CPU. This means
that as long as the IO submitter (or the interrupt target CPUs
for reads) runs on different CPUs the encryption work will be also
parallel.

To avoid a bottleneck on the IO worker I also changed those to be
per-CPU threads.

There is still some shared data, so I suspect some bouncing
cache lines. But I haven't done a detailed study on that yet.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm crypt: simplify compatible table output
Milan Broz [Thu, 13 Jan 2011 19:59:52 +0000 (19:59 +0000)]
dm crypt: simplify compatible table output

Rename cc->cipher_mode to cc->cipher_string and store the whole of the cipher
information so it can easily be printed when processing the DM_DEV_STATUS ioctl.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm log userspace: add version number to comms
Jonathan Brassow [Thu, 13 Jan 2011 19:59:52 +0000 (19:59 +0000)]
dm log userspace: add version number to comms

This patch adds a 'version' field to the 'dm_ulog_request'
structure.

The 'version' field is taken from a portion of the unused
'padding' field in the 'dm_ulog_request' structure.  This
was done to avoid changing the size of the structure and
possibly disrupting backwards compatibility.

The version number will help notify user-space daemons
when a change has been made to the kernel/userspace
log API.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm log userspace: group clear and mark requests
Jonathan Brassow [Thu, 13 Jan 2011 19:59:51 +0000 (19:59 +0000)]
dm log userspace: group clear and mark requests

Allow the device-mapper log's 'mark' and 'clear' requests to be
grouped and processed in a batch.  This can significantly reduce the
amount of traffic going between the kernel and userspace (where the
processing daemon resides).

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm log userspace: split flush queue
Jonathan Brassow [Thu, 13 Jan 2011 19:59:50 +0000 (19:59 +0000)]
dm log userspace: split flush queue

Split the 'flush_list', which contained a mix of both 'mark' and 'clear'
requests, into two distinct lists ('mark_list' and 'clear_list').

The device mapper log implementations (used by various DM targets) are
allowed to cache 'mark' and 'clear' requests until a 'flush' is
received.  Until now, these cached requests were kept in the same list.
They will now be put into distinct lists to facilitate group processing
of these requests (in the next patch).

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm kcopyd: delay unplugging
Mikulas Patocka [Thu, 13 Jan 2011 19:59:50 +0000 (19:59 +0000)]
dm kcopyd: delay unplugging

Make kcopyd merge more I/O requests by using device unplugging.

Without this patch, each I/O request is dispatched separately to the device.
If the device supports tagged queuing, there are many small requests sent
to the device. To improve performance, this patch will batch as many requests
as possible, allowing the queue to merge consecutive requests, and send them
to the device at once.

In my tests (15k SCSI disk), this patch improves sequential write throughput:

  Sequential write throughput (chunksize of 4k, 32k, 512k)
  unpatched: 15.2, 18.5, 17.5 MB/s
  patched:   14.4, 22.6, 23.0 MB/s

In most common uses (snapshot or two-way mirror), kcopyd is only used for
two devices, one for reading and the other for writing, thus this optimization
is implemented only for two devices. The optimization may be extended to n-way
mirrors with some code complexity increase.

We keep track of two block devices to unplug (one for read and the
other for write) and unplug them when exiting "do_work" thread.  If
there are more devices used (in theory it could happen, in practice it
is rare), we unplug immediately.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm log userspace: trap all failed log construction errors
Jonathan Brassow [Thu, 13 Jan 2011 19:59:49 +0000 (19:59 +0000)]
dm log userspace: trap all failed log construction errors

When constructing a mirror log, it is possible for the initial request
to fail for other reasons besides -ESRCH.  These must be handled too.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm crypt: set key size early
Milan Broz [Thu, 13 Jan 2011 19:59:49 +0000 (19:59 +0000)]
dm crypt: set key size early

Simplify key size verification (hexadecimal string) and
set key size early in constructor.

(Patch required by later changes.)

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm: remove dm_mutex after bkl conversion
Milan Broz [Thu, 13 Jan 2011 19:59:48 +0000 (19:59 +0000)]
dm: remove dm_mutex after bkl conversion

This patch replaces dm_mutex with _minor_lock in dm_blk_close()
and then removes it.

During the BKL conversion, commit 6e9624b8caec290d28b4c6d9ec75749df6372b87
(block: push down BKL into .open and .release) pushed lock_kernel()
down into dm_blk_open/close calls.
Commit 2a48fc0ab24241755dc93bfd4f01d68efab47f5a
(block: autoconvert trivial BKL users to private mutex) converted it to a
local mutex, but _minor_lock is sufficient.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm raid1: support discard
Mike Snitzer [Thu, 13 Jan 2011 19:59:48 +0000 (19:59 +0000)]
dm raid1: support discard

Enable discard support in the DM mirror target.
Also change an existing use of 'bvec' to 'addr' in the union.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm ioctl: allow rename to fill empty uuid
Peter Jones [Thu, 13 Jan 2011 19:59:47 +0000 (19:59 +0000)]
dm ioctl: allow rename to fill empty uuid

Allow the uuid of a mapped device to be set after device creation.
Previously the uuid (which is optional) could only be set by
DM_DEV_CREATE.  If no uuid was supplied it could not be set later.

Sometimes it's necessary to create the device before the uuid is known,
and in such cases the uuid must be filled in after the creation.

This patch extends DM_DEV_RENAME to accept a uuid accompanied by
a new flag DM_UUID_FLAG.  This can only be done once and if no
uuid was previously supplied.  It cannot be used to change an
existing uuid.

DM_VERSION_MINOR is also bumped to 19 to indicate this interface
extension is available.

Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm io: remove BIO_RW_SYNCIO flag from kcopyd
Mikulas Patocka [Thu, 13 Jan 2011 19:59:47 +0000 (19:59 +0000)]
dm io: remove BIO_RW_SYNCIO flag from kcopyd

Remove the REQ_SYNC flag to improve write throughput when writing
to the origin with a snapshot on the same device (using the CFQ I/O
scheduler).

Sequential write throughput (chunksize of 4k, 32k, 512k)
  unpatched:  8.5,  8.6,  9.3 MB/s
  patched:   15.2, 18.5, 17.5 MB/s

Snapshot exception reallocations are triggered by writes that are
usually async, so mark the associated dm_io_request as async as well.
This helps when using the CFQ I/O scheduler because it has separate
queues for sync and async I/O.  Async is optimized for throughput; sync
for latency.  With this change we're consciously favoring throughput over
latency.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
13 years agodm mpath: disable blk_abort_queue
Mike Snitzer [Thu, 13 Jan 2011 19:59:46 +0000 (19:59 +0000)]
dm mpath: disable blk_abort_queue

Revert commit 224cb3e981f1b2f9f93dbd49eaef505d17d894c2
  dm: Call blk_abort_queue on failed paths

Multipath began to use blk_abort_queue() to allow for
lower latency path deactivation.  This was found to
cause list corruption:

   the cmd gets blk_abort_queued/timedout run on it and the scsi eh
   somehow is able to complete and run scsi_queue_insert while
   scsi_request_fn is still trying to process the request.

   https://www.redhat.com/archives/dm-devel/2010-November/msg00085.html

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: Mike Anderson <andmike@linux.vnet.ibm.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: stable@kernel.org
13 years agodm: dont take i_mutex to change device size
Mike Snitzer [Thu, 13 Jan 2011 19:53:46 +0000 (19:53 +0000)]
dm: dont take i_mutex to change device size

No longer needlessly hold md->bdev->bd_inode->i_mutex when changing the
size of a DM device.  This additional locking is unnecessary because
i_size_write() is already protected by the existing critical section in
dm_swap_table().  DM already has a reference on md->bdev so the
associated bd_inode may be changed without lifetime concerns.

A negative side-effect of having held md->bdev->bd_inode->i_mutex was
that a concurrent DM device resize and flush (via fsync) would deadlock.
Dropping md->bdev->bd_inode->i_mutex eliminates this potential for
deadlock.  The following reproducer no longer deadlocks:
  https://www.redhat.com/archives/dm-devel/2009-July/msg00284.html

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: stable@kernel.org
13 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
Linus Torvalds [Thu, 13 Jan 2011 19:02:55 +0000 (11:02 -0800)]
Merge branch 'release' of git://git./linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] Fix format warning in arch/ia64/kernel/acpi.c

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
Linus Torvalds [Thu, 13 Jan 2011 19:02:05 +0000 (11:02 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ieee1394/linux1394-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  firewire: ohci: fix compilation on arches without PAGE_KERNEL_RO

13 years agoMerge branch 'for-2.6.38/drivers' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Thu, 13 Jan 2011 18:50:24 +0000 (10:50 -0800)]
Merge branch 'for-2.6.38/drivers' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.38/drivers' of git://git.kernel.dk/linux-2.6-block:
  cciss: reinstate proper FIFO order of command queue list
  floppy: replace NO_GEOM macro with a function

13 years agoMerge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Thu, 13 Jan 2011 18:45:01 +0000 (10:45 -0800)]
Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block: (43 commits)
  block: ensure that completion error gets properly traced
  blktrace: add missing probe argument to block_bio_complete
  block cfq: don't use atomic_t for cfq_group
  block cfq: don't use atomic_t for cfq_queue
  block: trace event block fix unassigned field
  block: add internal hd part table references
  block: fix accounting bug on cross partition merges
  kref: add kref_test_and_get
  bio-integrity: mark kintegrityd_wq highpri and CPU intensive
  block: make kblockd_workqueue smarter
  Revert "sd: implement sd_check_events()"
  block: Clean up exit_io_context() source code.
  Fix compile warnings due to missing removal of a 'ret' variable
  fs/block: type signature of major_to_index(int) to major_to_index(unsigned)
  block: convert !IS_ERR(p) && p to !IS_ERR_NOR_NULL(p)
  cfq-iosched: don't check cfqg in choose_service_tree()
  fs/splice: Pull buf->ops->confirm() from splice_from_pipe actors
  cdrom: export cdrom_check_events()
  sd: implement sd_check_events()
  sr: implement sr_check_events()
  ...

13 years agoMerge branch 'for-linus/i2c-2638' of git://git.fluff.org/bjdooks/linux
Linus Torvalds [Thu, 13 Jan 2011 18:40:57 +0000 (10:40 -0800)]
Merge branch 'for-linus/i2c-2638' of git://git.fluff.org/bjdooks/linux

* 'for-linus/i2c-2638' of git://git.fluff.org/bjdooks/linux:
  i2c-bfin-twi: move setup to the earlier subsys initcall
  i2c-bfin-twi: handle faulty slave devices better
  i2c-mv64xxx: send repeated START between messages in xfer
  i2c-nomadik: fix regression on adapter name
  i2c-omap: Set latency requirements only once for several messages
  i2c-eg20t: add driver for Intel EG20T
  i2c-ocores: add some device tree documentation
  i2c-ocores: Use devres for resource allocation
  i2c-ocores: Adapt for device tree
  i2c-iop3xx: add iomem annotation

13 years agoMerge branch 'rmobile-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal...
Linus Torvalds [Thu, 13 Jan 2011 18:40:00 +0000 (10:40 -0800)]
Merge branch 'rmobile-latest' of git://git./linux/kernel/git/lethal/sh-2.6

* 'rmobile-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  ARM: mach-shmobile: Kill off unused !gpio_is_valid() case
  ARM: mach-shmobile: sh7372 Enable SDIO IRQs for Mackerel
  ARM: mach-shmobile: sh7377 Enable SDIO IRQs
  ARM: mach-shmobile: sh7367 Enable SDIO IRQs
  ARM: mach-shmobile: sh7372 Enable SDIO IRQs
  ARM: mach-shmobile: mackerel: Add touchscreen ST1232 support
  ARM: mach-shmobile: ap4eb: SCIF port for earlyprintk when using zboot
  ARM: mach-shmobile: mackerel: SCIF port for earlyprintk when using zboot
  ARM: mach-shmobile: mackerel: Add support get_cd in CN23

13 years agoMerge branch 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal...
Linus Torvalds [Thu, 13 Jan 2011 18:39:38 +0000 (10:39 -0800)]
Merge branch 'sh-latest' of git://git./linux/kernel/git/lethal/sh-2.6

* 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (31 commits)
  sh: Add support for AP-SH4AD-0A board.
  sh: Add support for AP-SH4A-3A board.
  sh: Add a new mach type for alpha project boards.
  serial: sh-sci: build fixes.
  sh: sh7372 SH4AL-DSP probe support
  sh: sh7366 Enable SDIO IRQs
  sh: sh7343 Enable SDIO IRQs
  sh: mach-ecovec24: enable runtime PM for SDHI
  sh: sh7723 / ap325rxa enable SDIO IRQs
  sh: sh7722 Enable SDIO IRQs
  sh: sh7724 Enable SDIO IRQs
  sh: Fix up legacy PTEA space attribute mapping.
  sh: Stub out legacy PCC pgprot encoding for X2 TLBs.
  sh: constify prefetch pointers.
  sh: Add a machvec callback for early memblock reservations.
  sh: update sh7757lcr_defconfig
  sh: add PVR probing for SH7757 3rd cut
  sh: Use device_initcall() instead of __initcall()
  sh: intc - convert board specific landisk code
  sh: Move init_landisk_IRQ to header file
  ...

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6
Linus Torvalds [Thu, 13 Jan 2011 18:39:14 +0000 (10:39 -0800)]
Merge git://git./linux/kernel/git/lethal/fbdev-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6: (29 commits)
  video: move SH_MIPI_DSI/SH_LCD_MIPI_DSI to the top of menu
  fbdev: Implement simple blanking in pseudocolor modes for vt8500lcdfb
  video: imx: Update the manufacturer's name
  nuc900fb: don't treat NULL clk as an error
  s3c2410fb: don't treat NULL clk as an error
  video: tidy up modedb formatting.
  video: matroxfb: Correct video option in comments and kernel config help.
  fbdev: sh_mobile_hdmi: simplify pointer handling
  fbdev: sh_mobile_hdmi: framebuffer notifiers have to be registered
  fbdev: sh_mobile_hdmi: add command line option to use the preferred EDID mode
  OMAP: DSS2: Introduce omap_channel as an omap_dss_device parameter, add new overlay manager.
  OMAP: DSS2: Use dss_features to handle DISPC bits removed on OMAP4
  OMAP: DSS2: LCD2 Channel Changes for DISPC
  OMAP: DSS2: Change remaining DISPC functions for new omap_channel argument
  OMAP: DSS2: Introduce omap_channel argument to DISPC functions used by interface drivers
  OMAP: DSS2: Represent DISPC register defines with channel as parameter
  OMAP: DSS2: Add dss_features for omap4 and overlay manager related features
  OMAP: DSS2: Clean up DISPC color mode validation checks
  OMAP: DSS2: Add back authors of panel-generic.c based drivers
  OMAP: DSS2: remove generic DPI panel driver duplicated panel drivers
  ...

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
Linus Torvalds [Thu, 13 Jan 2011 18:32:54 +0000 (10:32 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (348 commits)
  ALSA: hda - Fix NULL-derefence with a single mic in STAC auto-mic detection
  ALSA: hda - Add missing NID 0x19 fixup for Sony VAIO
  ALSA: hda - Fix ALC275 enable hardware EQ for SONY VAIO
  ALSA: oxygen: fix Xonar DG input
  ALSA: hda - Fix EAPD on Lenovo NB ALC269 to low
  ALSA: hda - Fix missing EAPD for Acer 4930G
  ALSA: hda: Disable 4/6 channels on some NVIDIA GPUs.
  ALSA: hda - Add static_hdmi_pcm option to HDMI codec parser
  ALSA: hda - Don't refer ELD when unplugged
  ASoC: tpa6130a2: Fix compiler warning
  ASoC: tlv320dac33: Add DAPM selection for LOM invert
  ASoC: DMIC codec: Adding a generic DMIC codec
  ALSA: snd-usb-us122l: Fix missing NULL checks
  ALSA: snd-usb-us122l: Fix MIDI output
  ASoC: soc-cache: Fix invalid memory access during snd_soc_lzo_cache_sync()
  ASoC: Fix section mismatch in wm8995.c
  ALSA: oxygen: add S/PDIF source selection for Claro cards
  ALSA: oxygen: fix CD/MIDI for X-Meridian (2G)
  ASoC: fix migor audio build
  ALSA: include delay.h for msleep in Xonar DG support
  ...

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
Linus Torvalds [Thu, 13 Jan 2011 18:27:28 +0000 (10:27 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (41 commits)
  fs: add documentation on fallocate hole punching
  Gfs2: fail if we try to use hole punch
  Btrfs: fail if we try to use hole punch
  Ext4: fail if we try to use hole punch
  Ocfs2: handle hole punching via fallocate properly
  XFS: handle hole punching via fallocate properly
  fs: add hole punching to fallocate
  vfs: pass struct file to do_truncate on O_TRUNC opens (try #2)
  fix signedness mess in rw_verify_area() on 64bit architectures
  fs: fix kernel-doc for dcache::prepend_path
  fs: fix kernel-doc for dcache::d_validate
  sanitize ecryptfs ->mount()
  switch afs
  move internal-only parts of ncpfs headers to fs/ncpfs
  switch ncpfs
  switch 9p
  pass default dentry_operations to mount_pseudo()
  switch hostfs
  switch affs
  switch configfs
  ...

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Thu, 13 Jan 2011 18:25:58 +0000 (10:25 -0800)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (46 commits)
  hwrng: via_rng - Fix memory scribbling on some CPUs
  crypto: padlock - Move padlock.h into include/crypto
  hwrng: via_rng - Fix asm constraints
  crypto: n2 - use __devexit not __exit in n2_unregister_algs
  crypto: mark crypto workqueues CPU_INTENSIVE
  crypto: mv_cesa - dont return PTR_ERR() of wrong pointer
  crypto: ripemd - Set module author and update email address
  crypto: omap-sham - backlog handling fix
  crypto: gf128mul - Remove experimental tag
  crypto: af_alg - fix af_alg memory_allocated data type
  crypto: aesni-intel - Fixed build with binutils 2.16
  crypto: af_alg - Make sure sk_security is initialized on accept()ed sockets
  net: Add missing lockdep class names for af_alg
  include: Install linux/if_alg.h for user-space crypto API
  crypto: omap-aes - checkpatch --file warning fixes
  crypto: omap-aes - initialize aes module once per request
  crypto: omap-aes - unnecessary code removed
  crypto: omap-aes - error handling implementation improved
  crypto: omap-aes - redundant locking is removed
  crypto: omap-aes - DMA initialization fixes for OMAP off mode
  ...

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Thu, 13 Jan 2011 18:25:24 +0000 (10:25 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: fix cleanup when trying to mount inexistent image
  net/ceph: make ceph_msgr_wq non-reentrant
  ceph: fsc->*_wq's aren't used in memory reclaim path
  ceph: Always free allocated memory in osdmap_decode()
  ceph: Makefile: Remove unnessary code
  ceph: associate requests with opening sessions
  ceph: drop redundant r_mds field
  ceph: implement DIRLAYOUTHASH feature to get dir layout from MDS
  ceph: add dir_layout to inode

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
Linus Torvalds [Thu, 13 Jan 2011 18:24:52 +0000 (10:24 -0800)]
Merge git://git./linux/kernel/git/wim/linux-2.6-watchdog

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  watchdog: Add MCF548x watchdog driver.
  watchdog: add driver for the Atheros AR71XX/AR724X/AR913X SoCs
  watchdog: Add TCO support for nVidia chipsets
  watchdog: Add support for sp5100 chipset TCO
  watchdog: f71808e_wdt: add F71862FG, F71869 to Kconfig
  watchdog: iTCO_wdt: TCO Watchdog patch for Intel DH89xxCC PCH
  watchdog: iTCO_wdt: TCO Watchdog patch for Intel NM10 DeviceIDs
  watchdog: ks8695_wdt: include mach/hardware.h instead of mach/timex.h.
  watchdog: Propagate Book E WDT period changes to all cores
  watchdog: add CONFIG_WATCHDOG_NOWAYOUT support to PowerPC Book-E watchdog driver
  watchdog: alim7101_wdt: fix compiler warning on alim7101_pci_tbl
  watchdog: alim1535_wdt: fix compiler warning on ali_pci_tbl
  watchdog: Fix reboot on W83627ehf chipset.
  watchdog: Add watchdog support for W83627DHG chip
  watchdog: f71808e_wdt: Add Fintek F71869 watchdog
  watchdog: add f71862fg support
  watchdog: clean-up f71808e_wdt.c

13 years agoMerge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelv...
Linus Torvalds [Thu, 13 Jan 2011 18:24:29 +0000 (10:24 -0800)]
Merge branch 'hwmon-for-linus' of git://git./linux/kernel/git/jdelvare/staging

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  hwmon: (dme1737) Minor cleanups
  hwmon: (dme1737) Add support for in7 for SCH5127
  hwmon: (emc1403) Add EMC1423 support
  hwmon: (w83627hf) Document W83627THF voltage pin mapping
  hwmon: (w83793) Drop useless mutex
  hwmon: (fschmd) Drop useless mutex
  hwmon: (w83781d) Use pr_fmt and pr_<level>
  hwmon: (pc87427) Use pr_fmt and pr_<level>
  hwmon: (pc87360) Use pr_fmt and pr_<level>
  hwmon: (lm78) Use pr_fmt and pr_<level>
  hwmon: (it87) Use pr_fmt and pr_<level>
  hwmon: Schedule the removal of the old intrusion detection interfaces
  hwmon: (w83793) Implement the standard intrusion detection interface
  hwmon: (w83792d) Implement the standard intrusion detection interface
  hwmon: (adm9240) Implement the standard intrusion detection interface
  hwmon: (via686a) Initialize fan_div values
  hwmon: (w83795) Silent false warning from gcc
  hwmon: (ads7828) Update email contact details

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6
Linus Torvalds [Thu, 13 Jan 2011 18:24:07 +0000 (10:24 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/lrg/voltage-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (45 commits)
  regulator: missing index in PTR_ERR() in isl6271a_probe()
  regulator: Assign return value of mc13xxx_reg_rmw to ret
  regulator: Add initial per-regulator debugfs support
  regulator: Make regulator_has_full_constraints a bool
  regulator: Clean up logging a bit
  regulator: Optimise out noop voltage changes
  regulator: Add API to re-apply voltage to hardware
  regulator: Staticise non-exported functions in mc13892
  regulator: Only notify voltage changes when they succeed
  regulator: Provide a selector based set_voltage_sel() operation
  regulator: Factor out voltage set operation into a separate function
  regulator: Convert WM8994 to use get_voltage_sel()
  regulator: Convert WM835x to use get_voltage_sel()
  regulator: Allow modular build of mc13xxx-core
  regulator: support PMIC mc13892
  make mc13783 regulator code generic
  Change the register name definitions for mc13783
  mach-ux500: Updated and connected ab8500 regulator board configuration
  regulators: Removed macros for initialization of ab8500 regulators
  regulators: Added verbose debug messages to ab8500 regulators
  ...

13 years agoMerge branch 'x86-olpc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 13 Jan 2011 18:15:12 +0000 (10:15 -0800)]
Merge branch 'x86-olpc-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-olpc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, olpc: Speed up device tree creation during boot
  x86, olpc: Add OLPC device-tree support
  x86, of: Define irq functions to allow drivers/of/* to build on x86

13 years agoMerge branch 'kvm-updates/2.6.38' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Thu, 13 Jan 2011 18:14:24 +0000 (10:14 -0800)]
Merge branch 'kvm-updates/2.6.38' of git://git./virt/kvm/kvm

* 'kvm-updates/2.6.38' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (142 commits)
  KVM: Initialize fpu state in preemptible context
  KVM: VMX: when entering real mode align segment base to 16 bytes
  KVM: MMU: handle 'map_writable' in set_spte() function
  KVM: MMU: audit: allow audit more guests at the same time
  KVM: Fetch guest cr3 from hardware on demand
  KVM: Replace reads of vcpu->arch.cr3 by an accessor
  KVM: MMU: only write protect mappings at pagetable level
  KVM: VMX: Correct asm constraint in vmcs_load()/vmcs_clear()
  KVM: MMU: Initialize base_role for tdp mmus
  KVM: VMX: Optimize atomic EFER load
  KVM: VMX: Add definitions for more vm entry/exit control bits
  KVM: SVM: copy instruction bytes from VMCB
  KVM: SVM: implement enhanced INVLPG intercept
  KVM: SVM: enhance mov DR intercept handler
  KVM: SVM: enhance MOV CR intercept handler
  KVM: SVM: add new SVM feature bit names
  KVM: cleanup emulate_instruction
  KVM: move complete_insn_gp() into x86.c
  KVM: x86: fix CR8 handling
  KVM guest: Fix kvm clock initialization when it's configured out
  ...

13 years agoMerge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Linus Torvalds [Thu, 13 Jan 2011 18:05:56 +0000 (10:05 -0800)]
Merge branch 'for-next' of git://git./linux/kernel/git/jikos/trivial

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits)
  Documentation/trace/events.txt: Remove obsolete sched_signal_send.
  writeback: fix global_dirty_limits comment runtime -> real-time
  ppc: fix comment typo singal -> signal
  drivers: fix comment typo diable -> disable.
  m68k: fix comment typo diable -> disable.
  wireless: comment typo fix diable -> disable.
  media: comment typo fix diable -> disable.
  remove doc for obsolete dynamic-printk kernel-parameter
  remove extraneous 'is' from Documentation/iostats.txt
  Fix spelling milisec -> ms in snd_ps3 module parameter description
  Fix spelling mistakes in comments
  Revert conflicting V4L changes
  i7core_edac: fix typos in comments
  mm/rmap.c: fix comment
  sound, ca0106: Fix assignment to 'channel'.
  hrtimer: fix a typo in comment
  init/Kconfig: fix typo
  anon_inodes: fix wrong function name in comment
  fix comment typos concerning "consistent"
  poll: fix a typo in comment
  ...

Fix up trivial conflicts in:
 - drivers/net/wireless/iwlwifi/iwl-core.c (moved to iwl-legacy.c)
 - fs/ext4/ext4.h

Also fix missed 'diabled' typo in drivers/net/bnx2x/bnx2x.h while at it.

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Linus Torvalds [Thu, 13 Jan 2011 17:58:38 +0000 (09:58 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: hid-multitouch: minor fixes based on additional review
  HID: Switch turbox/mosart touchscreen to hid-mosart
  HID: add Add Cando touch screen 10.1-inch product id
  HID: hid-mulitouch: add support for the 'Sensing Win7-TwoFinger'
  HID: hid-multitouch: add support for Cypress TrueTouch panels
  HID: hid-multitouch: support for PixCir-based panels
  HID: set HID_MAX_FIELD at 128
  HID: add feature_mapping callback

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Thu, 13 Jan 2011 17:58:14 +0000 (09:58 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: add SW_ROTATE_LOCK switch type
  Input: fix force feedback capability query example
  Input: wacom_w8001 - add single-touch support
  Input: add Austria Microsystem AS5011 joystick driver
  Input: remove aaed2000 keyboard driver
  Input: i8042 - introduce 'notimeout' blacklist for Dell Vostro V13
  Input: cy8ctmg110_ts - Convert to dev_pm_ops
  Input: migor_ts - convert to dev_pm_ops
  Input: mcs5000_ts - convert to dev_pm_ops
  Input: eeti_ts - convert to dev_pm_ops
  Input: ad7879 - convert I2C to dev_pm_ops

13 years agodecompressors: remove unused constant from inflate.h
Lasse Collin [Thu, 13 Jan 2011 01:01:26 +0000 (17:01 -0800)]
decompressors: remove unused constant from inflate.h

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodecompressors: check input size in decompress_inflate.c
Lasse Collin [Thu, 13 Jan 2011 01:01:25 +0000 (17:01 -0800)]
decompressors: check input size in decompress_inflate.c

Check for end of the input buffer when skipping over the filename field in
the .gz file header.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agox86: support XZ-compressed kernel
Lasse Collin [Thu, 13 Jan 2011 01:01:24 +0000 (17:01 -0800)]
x86: support XZ-compressed kernel

This integrates the XZ decompression code to the x86 pre-boot code.

mkpiggy.c is updated to reserve about 32 KiB more buffer safety margin for
kernel decompression.  It is done unconditionally for all decompressors to
keep the code simpler.

The XZ decompressor needs around 30 KiB of heap, so the heap size is
increased to 32 KiB on both x86-32 and x86-64.

Documentation/x86/boot.txt is updated to list the XZ magic number.

With the x86 BCJ filter in XZ, XZ-compressed x86 kernel tends to be a few
percent smaller than the equivalent LZMA-compressed kernel.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodecompressors: add boot-time XZ support
Lasse Collin [Thu, 13 Jan 2011 01:01:23 +0000 (17:01 -0800)]
decompressors: add boot-time XZ support

This implements the API defined in <linux/decompress/generic.h> which is
used for kernel, initramfs, and initrd decompression.  This patch together
with the first patch is enough for XZ-compressed initramfs and initrd;
XZ-compressed kernel will need arch-specific changes.

The buffering requirements described in decompress_unxz.c are stricter
than with gzip, so the relevant changes should be done to the
arch-specific code when adding support for XZ-compressed kernel.
Similarly, the heap size in arch-specific pre-boot code may need to be
increased (30 KiB is enough).

The XZ decompressor needs memmove(), memeq() (memcmp() == 0), and
memzero() (memset(ptr, 0, size)), which aren't available in all
arch-specific pre-boot environments.  I'm including simple versions in
decompress_unxz.c, but a cleaner solution would naturally be nicer.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodecompressors: add XZ decompressor module
Lasse Collin [Thu, 13 Jan 2011 01:01:22 +0000 (17:01 -0800)]
decompressors: add XZ decompressor module

In userspace, the .lzma format has become mostly a legacy file format that
got superseded by the .xz format.  Similarly, LZMA Utils was superseded by
XZ Utils.

These patches add support for XZ decompression into the kernel.  Most of
the code is as is from XZ Embedded <http://tukaani.org/xz/embedded.html>.
It was written for the Linux kernel but is usable in other projects too.

Advantages of XZ over the current LZMA code in the kernel:
  - Nice API that can be used by other kernel modules; it's
    not limited to kernel, initramfs, and initrd decompression.
  - Integrity check support (CRC32)
  - BCJ filters improve compression of executable code on
    certain architectures. These together with LZMA2 can
    produce a few percent smaller kernel or Squashfs images
    than plain LZMA without making the decompression slower.

This patch: Add the main decompression code (xz_dec), testing module
(xz_dec_test), wrapper script (xz_wrap.sh) for the xz command line tool,
and documentation.  The xz_dec module is enough to have a usable XZ
decompressor e.g.  for Squashfs.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: fix callback-to-callback mode in decompress_unlzo.c
Lasse Collin [Thu, 13 Jan 2011 01:01:21 +0000 (17:01 -0800)]
Decompressors: fix callback-to-callback mode in decompress_unlzo.c

Callback-to-callback decompression mode is used for initrd (not
initramfs).  The LZO wrapper is broken for this use case for two reasons:

  - The argument validation is needlessly too strict by
    requiring that "posp" is non-NULL when "fill" is non-NULL.

  - The buffer handling code didn't work at all for this
    use case.

I tested with LZO-compressed kernel, initramfs, initrd, and corrupt
(truncated) initramfs and initrd images.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: check input size in decompress_unlzo.c
Lasse Collin [Thu, 13 Jan 2011 01:01:21 +0000 (17:01 -0800)]
Decompressors: check input size in decompress_unlzo.c

The code assumes that the input is valid and not truncated.  Add checks to
avoid reading past the end of the input buffer.  Change the type of "skip"
from u8 to int to fix a possible integer overflow.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: check for write errors in decompress_unlzo.c
Lasse Collin [Thu, 13 Jan 2011 01:01:20 +0000 (17:01 -0800)]
Decompressors: check for write errors in decompress_unlzo.c

The return value of flush() is not checked in unlzo().  This means that
the decompressor won't stop even if the caller doesn't want more data.
This can happen e.g.  with a corrupt LZO-compressed initramfs image.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: validate match distance in decompress_unlzma.c
Lasse Collin [Thu, 13 Jan 2011 01:01:19 +0000 (17:01 -0800)]
Decompressors: validate match distance in decompress_unlzma.c

Validate the newly decoded distance (rep0) in process_bit1().  This is to
detect corrupt LZMA data quickly.  The old code can run for long time
producing garbage until it hits the end of the input.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: check for write errors in decompress_unlzma.c
Lasse Collin [Thu, 13 Jan 2011 01:01:18 +0000 (17:01 -0800)]
Decompressors: check for write errors in decompress_unlzma.c

The return value of wr->flush() is not checked in write_byte().  This
means that the decompressor won't stop even if the caller doesn't want
more data.  This can happen e.g.  with corrupt LZMA-compressed initramfs.
Returning the error quickly allows the user to see the error message
quicker.

There is a similar missing check for wr.flush() near the end of unlzma().

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: check for read errors in decompress_unlzma.c
Lasse Collin [Thu, 13 Jan 2011 01:01:17 +0000 (17:01 -0800)]
Decompressors: check for read errors in decompress_unlzma.c

Return value of rc->fill() is checked in rc_read() and error() is called
when needed, but then the code continues as if nothing had happened.

rc_read() is a void function and it's on the top of performance critical
call stacks, so propagating the error code via return values doesn't sound
like the best fix.  It seems better to check rc->buffer_size (which holds
the return value of rc->fill()) in the main loop.  It does nothing bad
that the code runs a little with unknown data after a failed rc->fill().

This fixes an infinite loop in initramfs decompression if the
LZMA-compressed initramfs image is corrupt.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: fix header validation in decompress_unlzma.c
Lasse Collin [Thu, 13 Jan 2011 01:01:17 +0000 (17:01 -0800)]
Decompressors: fix header validation in decompress_unlzma.c

Validation of header.pos calls error() but doesn't make the function
return to indicate an error to the caller.  Instead the decoding is
attempted with invalid header.pos.  This fixes it.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: remove unused function from lib/decompress_unlzma.c
Lasse Collin [Thu, 13 Jan 2011 01:01:16 +0000 (17:01 -0800)]
Decompressors: remove unused function from lib/decompress_unlzma.c

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: include <linux/slab.h> in <linux/decompress/mm.h>
Lasse Collin [Thu, 13 Jan 2011 01:01:15 +0000 (17:01 -0800)]
Decompressors: include <linux/slab.h> in <linux/decompress/mm.h>

Currently users of mm.h need to include <linux/slab.h> to use the macros
malloc() and free() provided by mm.h.  This fixes it.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: get rid of set_error_fn() macro
Lasse Collin [Thu, 13 Jan 2011 01:01:14 +0000 (17:01 -0800)]
Decompressors: get rid of set_error_fn() macro

set_error_fn() has become a useless complication after c1e7c3ae59
("bzip2/lzma/gzip: pre-boot malloc doesn't return NULL on failure") fixed
the use of error() in malloc().  Only decompress_unlzma.c had some use for
it and that was easy to change too.

This also gets rid of the static function pointer "error", which
should have been marked as __initdata.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDecompressors: add missing INIT (i.e. __init)
Lasse Collin [Thu, 13 Jan 2011 01:01:13 +0000 (17:01 -0800)]
Decompressors: add missing INIT (i.e. __init)

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoromfs: have romfs_fs.h pull in necessary headers
Mike Frysinger [Thu, 13 Jan 2011 01:01:12 +0000 (17:01 -0800)]
romfs: have romfs_fs.h pull in necessary headers

This header uses things like __be32, so pull in linux/types.h.

Further, it uses BLOCK_SIZE, so pull in linux/fs.h.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoramoops: fix types, remove typecasts
Andrew Morton [Thu, 13 Jan 2011 01:01:11 +0000 (17:01 -0800)]
ramoops: fix types, remove typecasts

Cc: Ahmed S. Darwish <darwish.07@gmail.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marco Stornelli <marco.stornelli@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agocramfs: generate unique inode number for better inode cache usage
Stefani Seibold [Thu, 13 Jan 2011 01:01:10 +0000 (17:01 -0800)]
cramfs: generate unique inode number for better inode cache usage

Generate a unique inode numbers for any entries in the cram file system.
For files which did not contain data's (device nodes, fifos and sockets)
the offset of the directory entry inside the cramfs plus 1 will be used as
inode number.

The + 1 for the inode will it make possible to distinguish between a file
which contains no data and files which has data, the later one has a inode
value where the lower two bits are always 0.

It also reimplements the behavior to set the size and the number of block
to 0 for special file, which is the right value for empty files, devices,
fifos and sockets

As a little benefit it will be also more compatible which older mkcramfs,
because it will never use the cramfs_inode->offset for creating a inode
number for special files.

[akpm@linux-foundation.org: trivial comment fix]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Stefani Seibold <stefani@seibold.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agocramfs: hide function prototypes behind __KERNEL__ macro
Alexander Shishkin [Thu, 13 Jan 2011 01:01:09 +0000 (17:01 -0800)]
cramfs: hide function prototypes behind __KERNEL__ macro

Currently, 3 kernel function prototypes are present in a header
file exported to userland. This patch fixes it.

Signed-off-by: Alexander Shishkin <virtuoso@slind.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoaio: remove unused aio_run_iocbs()
Jeff Moyer [Thu, 13 Jan 2011 01:01:08 +0000 (17:01 -0800)]
aio: remove unused aio_run_iocbs()

aio_run_iocbs() is not used at all, so get rid of it.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoaio: remove unnecessary check
Namhyung Kim [Thu, 13 Jan 2011 01:01:08 +0000 (17:01 -0800)]
aio: remove unnecessary check

'nr >= min_nr >= 0' always satisfies 'nr >= 0' so the check is unnecesary.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoVMware balloon: stop locking pages when hypervisor tells us enough
Dmitry Torokhov [Thu, 13 Jan 2011 01:01:07 +0000 (17:01 -0800)]
VMware balloon: stop locking pages when hypervisor tells us enough

When hypervisor decides to decrease target balloon size while the balloon
driver tries to lock pages hypervisor may respond with
VMW_BALLOON_PPN_NOTNEEDED.  Use this data and immediately stop reserving
pages and wait for the next update cycle to fetch new target instead of
continuing trying to lock pages until size of refused list grows above
VMW_BALLOON_MAX_REFUSED (16) pages.

As a result the driver stops bothering the hypervisor with its attempts to
lock more pages that are not needed anymore.  Most likely next order from
hypervisor will be to reduce ballon size anyway.

It is a small optimization.

Signed-off-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agow1: DS2423 counter driver and documentation
Mika Laitio [Thu, 13 Jan 2011 01:01:06 +0000 (17:01 -0800)]
w1: DS2423 counter driver and documentation

This is a 1-wire/w1 DS2423 slave driver for reading the values from all 4
counters available DS2423 devices by using standard w1_slave file.  In
ds2423 the counters are tied to ram pages 12-15 in and each of those
ram-pages.  Each of these counter values (and asoociated ram page values)
are represented as a own line in w1_slave file.  Driver has been tested on
mips and x86.

usage example:
cat /sys/bus/w1/devices/1d-00000009b964/w1_slave

00 02 00 00 00 00 00 00 00 6d 38 00 ff ff 00 00 fe ff 00 00 ff ff 00 00 ff
ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2
00 02 00 00 00 00 00 00 00 e0 1f 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff
ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2
00 5a 0e 5f 18 00 00 00 00 0b 28 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff
ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=408882778
00 05 00 00 00 00 00 00 00 8d 39 ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff crc=YES c=5

Patch includes also the documentation.

[randy.dunlap@oracle.com: fix ds2423 build, needs to select CRC16]
Signed-off-by: Mika Laitio <lamikr@pilppa.org>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomemstick: factor out transfer initiating functionality in mspro_block.c
Alex Dubov [Thu, 13 Jan 2011 01:01:05 +0000 (17:01 -0800)]
memstick: factor out transfer initiating functionality in mspro_block.c

Apart from currently used standard memstick data transfer method, Sony
introduced several newer ones, to uncover full bandwidth/capacity of its
Pro, HG and XC media formats. This patch lays a foundation to enable
those methods as made possible by host/media capabilities.

As a side effect of this patch, mspro_block_read_attributes became more
streamlined and readable.

[akpm@linux-foundation.org: fix printk warning]
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Reported-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomemstick: remove mspro_block_mutex
Alex Dubov [Thu, 13 Jan 2011 01:01:04 +0000 (17:01 -0800)]
memstick: remove mspro_block_mutex

mspro_block_mutex is identical in scope to mspro_block_disk_lock and therefore
unnecessary.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomemstick: avert possible race condition between idr_pre_get and idr_get_new
Alex Dubov [Thu, 13 Jan 2011 01:01:04 +0000 (17:01 -0800)]
memstick: avert possible race condition between idr_pre_get and idr_get_new

Implement the usual pattern around idr_pre_get() and idr_get_new() to
handlethe situation where another thread concurrently steals this thread's
idr_pre_get() preallocation.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomemstick: add support for JMicron JMB 385 and 390 controllers
Takashi Iwai [Thu, 13 Jan 2011 01:01:03 +0000 (17:01 -0800)]
memstick: add support for JMicron JMB 385 and 390 controllers

Signed-off-by: Aries Lee <arieslee@jmicron.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomemstick: set PMOS values propery for JMicron 38x controllers
Takashi Iwai [Thu, 13 Jan 2011 01:01:02 +0000 (17:01 -0800)]
memstick: set PMOS values propery for JMicron 38x controllers

Add a function jmb38x_ms_pmos() to enable / disable PMOS setups for
JMicron 38x controllers.

Signed-off-by: Aries Lee <arieslee@jmicron.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomemstick: fix setup for JMicron 38x controllers
Takashi Iwai [Thu, 13 Jan 2011 01:01:01 +0000 (17:01 -0800)]
memstick: fix setup for JMicron 38x controllers

This patch corrects the definition of clock values for JMicron 38x
controllers and sets the value properly per interface type.
Also, it adds a check for TPC errors in the interrupt handler.

Signed-off-by: Aries Lee <arieslee@jmicron.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomemstick: core: fix device_register() error handling
Vasiliy Kulikov [Thu, 13 Jan 2011 01:01:00 +0000 (17:01 -0800)]
memstick: core: fix device_register() error handling

If device_register() fails then call put_device().  See comment to
device_register.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: add parallel port PPS signal generator
Alexander Gordeev [Thu, 13 Jan 2011 01:01:00 +0000 (17:01 -0800)]
pps: add parallel port PPS signal generator

Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals.  It uses parport abstraction layer and hrtimers to
precisely control the signal.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: add parallel port PPS signal generator
Alexander Gordeev [Thu, 13 Jan 2011 01:00:59 +0000 (17:00 -0800)]
pps: add parallel port PPS signal generator

Add PPS signal generator which utilizes STROBE pin of a parallel port to
send PPS signals.  It uses parport abstraction layer and hrtimers to
precisely control the signal.

[akpm@linux-foundation.org: fix build]
Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: add parallel port PPS client
Alexander Gordeev [Thu, 13 Jan 2011 01:00:58 +0000 (17:00 -0800)]
pps: add parallel port PPS client

Add parallel port PPS client.  It uses a standard method for capturing
timestamps for assert edge transitions: getting a timestamp soon after an
interrupt has happened.

This is not a very precise source of time information due to interrupt
handling delays.  However, timestamps for clear edge transitions are much
more precise because the interrupt handler continuously polls hardware
port until the transition is done.

Hardware port operations require only about 1us so the maximum error
should not exceed this value.  This was my primary goal when developing
this client.

Clear edge capture could be disabled using clear_wait parameter.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: add kernel consumer support
Alexander Gordeev [Thu, 13 Jan 2011 01:00:58 +0000 (17:00 -0800)]
pps: add kernel consumer support

Add an optional feature of PPSAPI, kernel consumer support, which uses the
added hardpps() function.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: capture MONOTONIC_RAW timestamps as well
Alexander Gordeev [Thu, 13 Jan 2011 01:00:57 +0000 (17:00 -0800)]
pps: capture MONOTONIC_RAW timestamps as well

MONOTONIC_RAW clock timestamps are ideally suited for frequency
calculation and also fit well into the original NTP hardpps design.  Now
phase and frequency can be adjusted separately: the former based on
REALTIME clock and the latter based on MONOTONIC_RAW clock.

A new function getnstime_raw_and_real is added to timekeeping subsystem to
capture both timestamps at the same time and atomically.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agontp: add hardpps implementation
Alexander Gordeev [Thu, 13 Jan 2011 01:00:56 +0000 (17:00 -0800)]
ntp: add hardpps implementation

This commit adds hardpps() implementation based upon the original one from
the NTPv4 reference kernel code from David Mills.  However, it is highly
optimized towards very fast syncronization and maximum stickness to PPS
signal.  The typical error is less then a microsecond.

To make it sync faster I had to throw away exponential phase filter so
that the full phase offset is corrected immediately.  Then I also had to
throw away median phase filter because it gives a bigger error itself if
used without exponential filter.

Maybe we will find an appropriate filtering scheme in the future but it's
not necessary if the signal quality is ok.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: timestamp is always passed to dcd_change()
Alexander Gordeev [Thu, 13 Jan 2011 01:00:55 +0000 (17:00 -0800)]
pps: timestamp is always passed to dcd_change()

Remove the code that gatheres timestamp in pps_tty_dcd_change() in case
passed ts parameter is NULL because it never happens in the current code.
Fix comments as well.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: simplify conditions a bit
Alexander Gordeev [Thu, 13 Jan 2011 01:00:54 +0000 (17:00 -0800)]
pps: simplify conditions a bit

Bitwise conjunction is distributive so we can simplify some conditions.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: use BUG_ON for kernel API safety checks
Alexander Gordeev [Thu, 13 Jan 2011 01:00:54 +0000 (17:00 -0800)]
pps: use BUG_ON for kernel API safety checks

This way less overhead is involved when running production kernel.  If you
want to debug a pps client module please define DEBUG to enable the
checks.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: make idr lock a mutex and protect idr_pre_get
Alexander Gordeev [Thu, 13 Jan 2011 01:00:53 +0000 (17:00 -0800)]
pps: make idr lock a mutex and protect idr_pre_get

Now pps_idr_lock is never used in interrupt context so we can replace
spin_lock_irq/spin_unlock_irq with plain spin_lock/spin_unlock. But
there is also a potential race condition when someone can steal an id
which was allocated by idr_pre_get before it is used. So convert spin
lock to mutex and protect the whole id generation process.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: move idr stuff to pps.c
Alexander Gordeev [Thu, 13 Jan 2011 01:00:53 +0000 (17:00 -0800)]
pps: move idr stuff to pps.c

Since now idr is only used to manage char device id's and not used in
kernel API anymore it should be moved to pps.c.  This also makes it
possible to release id only at actual device freeing so nobody can
register a pps device with the same id while our device is not freed yet.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: convert printk/pr_* to dev_*
Alexander Gordeev [Thu, 13 Jan 2011 01:00:52 +0000 (17:00 -0800)]
pps: convert printk/pr_* to dev_*

Since we now have direct pointers to struct pps_device everywhere it's
easy to use dev_* functions to print messages instead of plain printks.
Where dev_* cannot be used printks are converted to pr_*.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: access pps device by direct pointer
Alexander Gordeev [Thu, 13 Jan 2011 01:00:51 +0000 (17:00 -0800)]
pps: access pps device by direct pointer

Using device index as a pointer needs some unnecessary work to be done
every time the pointer is needed (in irq handler for example).  Using a
direct pointer is much more easy (and safe as well).

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: unify timestamp gathering
Alexander Gordeev [Thu, 13 Jan 2011 01:00:50 +0000 (17:00 -0800)]
pps: unify timestamp gathering

Add a helper function to gather timestamps.  This way clients don't have
to duplicate it.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: fix race in PPS_FETCH handler
Alexander Gordeev [Thu, 13 Jan 2011 01:00:50 +0000 (17:00 -0800)]
pps: fix race in PPS_FETCH handler

There was a race in PPS_FETCH ioctl handler when several processes want to
obtain PPS data simultaneously using sleeping PPS_FETCH.  They all sleep
most of the time in the system call.

With the old approach when the first process waiting on the pps queue is
waken up it makes new system call right away and zeroes pps->go.  So other
processes continue to sleep.  This is a clear race condition because of
the global 'go' variable.

With the new approach pps->last_ev holds some value increasing at each PPS
event.  PPS_FETCH ioctl handler saves current value to the local variable
at the very beginning so it can safely check that there is a new event by
just comparing both variables.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: declare variables where they are used in switch
Alexander Gordeev [Thu, 13 Jan 2011 01:00:49 +0000 (17:00 -0800)]
pps: declare variables where they are used in switch

Move variable declarations where they are used in pps_cdev_ioctl.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agopps: trivial fixes
Alexander Gordeev [Thu, 13 Jan 2011 01:00:49 +0000 (17:00 -0800)]
pps: trivial fixes

Here are some very trivial fixes combined:

- add macro definitions to protect header file from including several times

- remove declaration for an unexistent array

- fix typos

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agotaskstats: use better ifdef for alignment
Jeff Mahoney [Thu, 13 Jan 2011 01:00:48 +0000 (17:00 -0800)]
taskstats: use better ifdef for alignment

Commit 4be2c95d ("taskstats: pad taskstats netlink response for aligment
issues on ia64") added a null field to align the taskstats structure but
the discussion centered around ia64.  The issue exists on other platforms
with inefficient unaligned access and adding them piecemeal would be an
unmaintainable mess.

This patch uses Dave Miller's suggestion of using a combination of
CONFIG_64BIT && !CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS to determine
whether alignment is needed.

Note that this will cause breakage on those platforms with applications
like iotop which had hard-coded offsets into the packet to access the
taskstats structure.

The message seen on systems without the alignment fixes looks like: kernel
unaligned access to 0xe000023879dca9bc, ip=0xa000000100133d10

The addresses may vary but resolve to locations inside __delayacct_add_tsk.

iotop makes what I'd call unreasonable assumptions about the contents of a
netlink genetlink packet containing generic attributes.  They're typed and
have headers that specify value lengths, so the client can (should)
identify and skip the ones the client doesn't understand.

The kernel, as of version 2.6.36, presented a packet like so:
+--------------------------------+
| genlmsghdr - 4 bytes           |
+--------------------------------+
| NLA header - 4 bytes           | /* Aggregate header */
+-+------------------------------+
| | NLA header - 4 bytes         | /* PID header */
| +------------------------------+
| | pid/tgid   - 4 bytes         |
| +------------------------------+
| | NLA header - 4 bytes         | /* stats header */
| + -----------------------------+ <- oops. aligned on 4 byte boundary
| | struct taskstats - 328 bytes |
+-+------------------------------+

The iotop code expects that the kernel will behave as it did then,
assuming that the packet format is set in stone.  The format is set in
stone, but the packet offsets are not.  There's nothing in the packet
format that guarantees that the packet will be sent in exactly the same
way.  The attribute contents are set (or versioned) and the aggregate
contents are set but they can be anywhere in the packet.

The issue here isn't that an unaligned structure gets passed to userspace,
it's that the NLA infrastructure has something of a weakness: The 4 byte
attribute header may force the payload to be unaligned.  The taskstats
structure is created at an unaligned location and then 64-bit values are
operated on inside the kernel, so the unaligned access warnings gets
spewed everywhere.

It's possible to use the unaligned access API to operate on the structure
in the kernel but it seems like a wasted effort to work around userspace
code that isn't following the packet format.  Any new additions would also
need the be worked around.  It's a maintenance nightmare.

The conclusion of the earlier discussion seemed to be "ok fine, if we have
to break it, don't break it on arches that don't have the problem." Dave
pointed out that the unaligned access problem doesn't only exist on ia64,
but also on other 64-bit arches that don't have efficient unaligned access
and it should be fixed there as well.  The committed version of the patch
and this addition keep with the conclusion of that discussion not to break
it unnecessarily, which the pid padding and the packet padding fixes did
do.  x86_64 and powerpc don't suffer this problem so they shouldn't suffer
the solution.  Other 64-bit architectures do and will, though.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reported-by: David S. Miller <davem@davemloft.net>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Florian Mickler <florian@mickler.org>
Cc: Guillaume Chazarain <guichaz@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoNFC: Driver for NXP Semiconductors PN544 NFC chip.
Matti J. Aaltonen [Thu, 13 Jan 2011 01:00:47 +0000 (17:00 -0800)]
NFC: Driver for NXP Semiconductors PN544 NFC chip.

Creates a new "Near Field Communication" subsystem in drivers/nfc.
http://en.wikipedia.org/wiki/Near_Field_Communication is useful ;)

This is a driver for the pn544 NFC device. The driver transfers
ETSI messages between the device and the user space.

Signed-off-by: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agouser_ns: improve the user_ns on-the-slab packaging
Pavel Emelyanov [Thu, 13 Jan 2011 01:00:46 +0000 (17:00 -0800)]
user_ns: improve the user_ns on-the-slab packaging

Currently on 64-bit arch the user_namespace is 2096 and when being
kmalloc-ed it resides on a 4k slab wasting 2003 bytes.

If we allocate a separate cache for it and reduce the hash size from 128
to 64 chains the packaging becomes *much* better - the struct is 1072
bytes and the hole between is 98 bytes.

[akpm@linux-foundation.org: s/__initcall/module_init/]
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Serge E. Hallyn <serge@hallyn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agosysctl: remove obsolete comments
Jovi Zhang [Thu, 13 Jan 2011 01:00:45 +0000 (17:00 -0800)]
sysctl: remove obsolete comments

ctl_unnumbered.txt have been removed in Documentation directory so just
also remove this invalid comments

[akpm@linux-foundation.org: fix Documentation/sysctl/00-INDEX, per Dave]
Signed-off-by: Jovi Zhang <bookjovi@gmail.com>
Cc: Dave Young <hidave.darkstar@gmail.com>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agosysctl: fix #ifdef guard comment
Jovi Zhang [Thu, 13 Jan 2011 01:00:45 +0000 (17:00 -0800)]
sysctl: fix #ifdef guard comment

Signed-off-by: Jovi Zhang <bookjovi@gmail.com>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agorapidio: fix hang on RapidIO doorbell queue full condition
Thomas Taranowski [Thu, 13 Jan 2011 01:00:44 +0000 (17:00 -0800)]
rapidio: fix hang on RapidIO doorbell queue full condition

In fsl_rio_dbell_handler() the code currently simply acknowledges the QFI
queue full interrupt, but does nothing to resolve the queue full
condition.  Instead, it jumps to the end of the isr.  When a queue full
condition occurs, the isr is then re-entered immediately and continually,
forever.

The fix is to just fall through and read out current doorbell entries.

Signed-off-by: Thomas Taranowski <tom@baringforge.com>
Cc: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agorapidio: add new idt sRIO switches
Alexandre Bounine [Thu, 13 Jan 2011 01:00:43 +0000 (17:00 -0800)]
rapidio: add new idt sRIO switches

Add new sRIO switch device IDs and enable a basic support for them.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agorapidio: use Component Tag for unified switch identification
Alexandre Bounine [Thu, 13 Jan 2011 01:00:42 +0000 (17:00 -0800)]
rapidio: use Component Tag for unified switch identification

Change the way how switchid value is set.  Local counter variable does not
provide unified way to identify switch devices in a system with multiple
processors.  Using local counter leads to the situation when the same RIO
switch has different switch ID for each processor.  Replacing local
counter with unique portion of the Component Tag provides unified
reference to the switch by every processor in the system.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agorapidio: add device object linking into discovery
Alexandre Bounine [Thu, 13 Jan 2011 01:00:41 +0000 (17:00 -0800)]
rapidio: add device object linking into discovery

Add setting links between rio_dev objects into the discovery process.
This needed to report device connections on agent (non-host) processors
that perform RIO discovery.  Originally, these links have been introduced
for enumerating host only to support error management.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agorapidio: add definitions of Component Tag fields
Alexandre Bounine [Thu, 13 Jan 2011 01:00:40 +0000 (17:00 -0800)]
rapidio: add definitions of Component Tag fields

Add definition of the unique device identifier field in the component tag.
 RIO_CTAG_UDEVID does not take all 32 bits of the component tag value to
allow future extensions to the component tag use.

Selected size of the RIO_CTAG_UDEVID field (17 bits) is sufficient to
accommodate maximum number of endpoints in large RIO network (16-bit id)
plus switches.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agorapidio: integrate rio_switch into rio_dev
Alexandre Bounine [Thu, 13 Jan 2011 01:00:39 +0000 (17:00 -0800)]
rapidio: integrate rio_switch into rio_dev

Convert RIO switches device structures (rio_dev + rio_switch) into a
single allocation unit.

This change is based on the fact that RIO switches are using common RIO
device objects anyway.  Allocating RIO switch objects as RIO devices with
added space for switch information simplifies handling of RIO switch
devices.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agorapidio: use common destid storage for endpoints and switches
Alexandre Bounine [Thu, 13 Jan 2011 01:00:38 +0000 (17:00 -0800)]
rapidio: use common destid storage for endpoints and switches

Change code to use one storage location common for switches and endpoints.
This eliminates unnecessary device type checks during basic access
operations.  Logic that assigns destid to RIO devices stays unchanged - as
before, switches use an associated destid because they do not have their
own.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Micha Nelissen <micha@neli.hopto.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>