* 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6:
  drm/i915/lvds: Remove 0xa0 DDC probe for LVDS
  drm/i915/crt: Remove 0xa0 probe for VGA

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: rpckbd - fix a leak of the IRQ during init failure
  Input: wacom - add support for Lenovo tablet ID (0xE6)
  Input: i8042 - downgrade selftest error message to dbg()
  Input: synaptics - fix crash in synaptics_module_init()
  Input: spear-keyboard - fix inverted condition in interrupt handler
  Input: uinput - allow for 0/0 min/max on absolute axes.
  Input: sparse-keymap - report KEY_UNKNOWN for unknown scan codes
  Input: sparse-keymap - report scancodes with key events
  Input: h3600_ts_input - fix a spelling error
  Input: wacom - report resolution for pen devices
  Input: wacom - constify wacom_features for a new missed Bamboo models

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/pseries: Fix build without CONFIG_HOTPLUG_CPU
  powerpc: Set nr_cpu_ids early and use it to free PACAs
  powerpc/pseries: Don't register global initcall
  powerpc/kexec: Fix mismatched ifdefs for PPC64/SMP.
  edac/mpc85xx: Limit setting/clearing of HID1[RFXE] to e500v1/v2 cores
  powerpc/85xx: Update dts for PCIe memory maps to match u-boot of Px020RDB

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: don't warn in btrfs_add_orphan
  Btrfs: fix free space cache when there are pinned extents and clusters V2
  Btrfs: Fix uninitialized root flags for subvolumes
  btrfs: clear __GFP_FS flag in the space cache inode
  Btrfs: fix memory leak in start_transaction()
  Btrfs: fix memory leak in btrfs_ioctl_start_sync()
  Btrfs: fix subvol_sem leak in btrfs_rename()
  Btrfs: Fix oops for defrag with compression turned on
  Btrfs: fix /proc/mounts info.
  Btrfs: fix compiler warning in file.c

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (27 commits)
  ipv6: Don't pass invalid dst_entry pointer to dst_release().
  mlx4: fix kfree on error path in new_steering_entry()
  tcp: len check is unnecessarily devastating, change to WARN_ON
  sctp: malloc enough room for asconf-ack chunk
  sctp: fix auth_hmacs field's length of struct sctp_cookie
  net: Fix dev dev_ethtool_get_rx_csum() for forced NETIF_F_RXCSUM
  usbnet: use eth%d name for known ethernet devices
  starfire: clean up dma_addr_t size test
  iwlegacy: fix bugs in change_interface
  carl9170: Fix tx aggregation problems with some clients
  iwl3945: disable hw scan by default
  wireless: rt2x00: rt2800usb.c add and identify ids
  iwl3945: do not deprecate software scan
  mac80211: fix aggregation frame release during timeout
  cfg80211: fix BSS double-unlinking (continued)
  cfg80211:: fix possible NULL pointer dereference
  mac80211: fix possible NULL pointer dereference
  mac80211: fix NULL pointer dereference in ieee80211_key_alloc()
  ath9k: fix a chip wakeup related crash in ath9k_start
  mac80211: fix a crash in minstrel_ht in HT mode with no supported MCS rates
  ...

This is a revert of 428d2e82.

This is broken in the same manner as for VGA: trying to write to an
invalid address on the (currently 7-bit) i2c bus.

One notable failure appears to be for MacBooks. The scary part was that
it gave the appearance of working (i.e. reporting the absence of the
panel) on various all-in-one machines with ghost LVDS panels and not
failing for laptops.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Acked-by: NDave Airlie <airlied@linux.ie>
Signed-off-by: NKeith Packard <keithp@keithp.com>

This is a moral revert of 6ec3d0c0.

Following the fix to reset the GMBUS controller after a NAK, we finally
utilize the 0xa0 probe for a CRT connection. And discover that the code
is broken. Shock.

There are a number of issues, but following a key insight from Dave
Airlie, that 0xA0 is an invalid address on a 7-bit bus (though not if we
were to enable 10-bit addressing), and would look like the EDID port
0x50, it is possible to see where the confusion starts.

In short, a write to 0xA0 is accepted by the GMBUS controller which we
interpreted as meaning the existence of a connection (a slave on the
other end of the wire ACKing the write). That was false.

During testing with a broken GMBUS implementation, which never reset an
earlier NAK, this test always reported a NAK and so we proceeded on to
the next test.
Reported-and-tested-by: NSitsofe Wheeler <sitsofe@yahoo.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=35904Reported-and-tested-by: NRiccardo Magliocchetti <riccardo.magliocchetti@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=32612Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Acked-by: NDave Airlie <airlied@linux.ie>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Signed-off-by: NMatt Evans <matt@ozlabs.au.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Without this, "holes" in the CPU numbering can cause us to
free too many PACAs
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Commit b3df895a "powerpc/kexec: Add support for FSL-BookE"
introduced the original PPC_STD_MMU_64 checks around the function
crash_kexec_wait_realmode().   Then commit c2be0548
"powerpc: Fix default_machine_crash_shutdown #ifdef botch" changed
the ifdef around the calling site to add a check on SMP, but the
ifdef around the function itself was left unchanged, leaving an
unused function for PPC_STD_MMU_64=y and SMP=n

Rather than have two ifdefs that can get out of sync like this,
simply put the corrected conditional around the function and use
a stub to get rid of one set of ifdefs completely.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

When I moved the orphan adding to btrfs_truncate I missed the fact that during
orphan cleanup we just add the orphan items to the orphan list without going
through btrfs_orphan_add, which results in lots of warnings on mount if you have
any orphan items that need to be truncated.  Just remove this warning since it's
ok, this will allow all of the normal space accounting take place.  Thanks,
Signed-off-by: NJosef Bacik <josef@redhat.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

I noticed a huge problem with the free space cache that was presenting
as an early ENOSPC.  Turns out when writing the free space cache out I
forgot to take into account pinned extents and more importantly
clusters.  This would result in us leaking free space everytime we
unmounted the filesystem and remounted it.

I fix this by making sure to check and see if the current block group
has a cluster and writing out any entries that are in the cluster to the
cache, as well as writing any pinned extents we currently have to the
cache since those will be available for us to use the next time the fs
mounts.

This patch also adds a check to the end of load_free_space_cache to make
sure we got the right amount of free space cache, and if not make sure
to clear the cache and re-cache the old fashioned way.
Signed-off-by: NJosef Bacik <josef@redhat.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

root_item->flags and root_item->byte_limit are not initialized when
a subvolume is created. This bug is not revealed until we added
readonly snapshot support - now you mount a btrfs filesystem and you
may find the subvolumes in it are readonly.

To work around this problem, we steal a bit from root_item->inode_item->flags,
and use it to indicate if those fields have been properly initialized.
When we read a tree root from disk, we check if the bit is set, and if
not we'll set the flag and initialize the two fields of the root item.
Reported-by: NAndreas Philipp <philipp.andreas@gmail.com>
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
Tested-by: NAndreas Philipp <philipp.andreas@gmail.com>
cc: stable@kernel.org
Signed-off-by: NChris Mason <chris.mason@oracle.com>

the object id of the space cache inode's key is allocated from the relative
root, just like the regular file. So we can't identify space cache inode by
checking the object id of the inode's key, and we have to clear __GFP_FS flag
at the time we look up the space cache inode.
Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com>
Signed-off-by: NLiu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

Free btrfs_trans_handle when join_transaction() fails
in start_transaction()
Signed-off-by: NYoshinori Sano <yoshinori.sano@gmail.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

Call btrfs_end_transaction() if btrfs_commit_transaction_async() fails.
Signed-off-by: NTsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

btrfs_rename() does not release the subvol_sem if the transaction failed to start.
Signed-off-by: NJohann Lombardi <johann@whamcloud.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

When we defrag a file, whose size can be fit into an inline extent,
with compression enabled, the compress type is set to be
fs_info->compress_type, which is 0 if the btrfs filesystem is mounted
without compress option. This leads to oops.
Reported-by: NDaniel Blueman <daniel.blueman@gmail.com>
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

Some mount options are not displayed by /proc/mounts.
This patch displays the option such as compress_type by /proc/mounts.

Ex.
  [before]
    $ mount | grep sdc2
    /dev/sdc2 on /test12 type btrfs (rw,space_cache,compress=lzo)
    $ cat /proc/mounts | grep sdc2
    /dev/sdc2 /test12 btrfs rw,relatime,compress 0 0

  [after]
    $ mount | grep sdc2
    /dev/sdc2 on /test12 type btrfs (rw,space_cache,compress=lzo)
    $ cat /proc/mounts | grep sdc2
    /dev/sdc2 /test12 btrfs rw,relatime,compress=lzo,space_cache 0 0
Signed-off-by: NTsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

While compiling Btrfs, I got following messages:

  CC [M]  fs/btrfs/file.o
fs/btrfs/file.c: In function '__btrfs_buffered_write':
fs/btrfs/file.c:909: warning: 'ret' may be used uninitialized in this function
  CC [M]  fs/btrfs/tree-defrag.o

This patch fixes compiler warning.
Signed-off-by: NTsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm: fix "persistant" typo
  drm/radeon/kms: add some new ontario pci ids
  drm/radeon/kms: pageflipping cleanup for avivo+
  drm/radeon/kms: Add support for tv-out dongle on G5 9600
  drm: export drm_find_cea_extension to drivers
  drm/radeon/kms: add some sanity checks to obj info record parsingi (v2)
  drm/i915: Reset GMBUS controller after NAK
  drm/i915: Busy-spin wait_for condition in atomic contexts
  drm/i915/lvds: Always return connected in the absence of better information

* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Fix ftrace
  microblaze: Wire up new syscalls
  microblaze: Fix level/edge irq sensibility

Update suitable words to explain / understand cgroups contents.
Signed-off-by: NGeunsik Lim <geunsik.lim@samsung.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

leds: move leds-class documentation under the leds/ subdir.
Add also a leds/00-INDEX file describing the files under leds/
Signed-off-by: NAntonio Ospite <ospite@studenti.unina.it>
Acked-by: NRichard Purdie <richard.purdie@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/kmemleak-test.c is used to provide an example of how kmemleak
tool works.

Memory is leaked at module unload-time, so building the test
in kernel (Y) makes the leaks impossible and the test useless.

Qualify DEBUG_KMEMLEAK_TEST config symbol with "depends on m",
to restrict module-only building.
Signed-off-by: NDaniel Baluta <dbaluta@ixiacom.com>
Acked-by: NPekka Enberg <penberg@kernel.org>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix some minor typos:
 * informations => information
 * there own => their own
 * these => this
Signed-off-by: NSylvestre Ledru <sylvestre.ledru@scilab.org>
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add a little more info for some of the panic-related kernel parameters.
Fix "oops=panic" to fit in 80 columns.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Reviewed-by: NJesper Juhl <jj@chaosbits.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add kernel-doc to syscalls in signal.c.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

General coding style and comment fixes; no code changes:

 - Use multi-line-comment coding style.
 - Put some function signatures completely on one line.
 - Hyphenate some words.
 - Spell Posix as POSIX.
 - Correct typos & spellos in some comments.
 - Drop trailing whitespace.
 - End sentences with periods.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Besides x86 and arm, kmemleak now supports powerpc, sparc, sh,
microblaze and tile.
Signed-off-by: NDaniel Baluta <dbaluta@ixiacom.com>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NJan Engelhardt <jengelh@medozas.de>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Signed-off-by: NAlex Deucher <alexdeucher@gmail.com>
Cc:stable@kernel.org
Signed-off-by: NDave Airlie <airlied@redhat.com>

Commit f23eb2b2 ('tty: stop using "delayed_work" in the tty layer')
ended up causing hung machines on UP with no preemption, because the
work routine to flip the buffer data to the ldisc would endlessly re-arm
itself if the destination buffer had filled up.

With the delayed work, that only caused a timer-driving polling of the
tty state every timer tick, but without the delay we just ended up with
basically a busy loop instead.

Stop the insane polling, and instead make the code that opens up the
receive room re-schedule the buffer flip work.  That's what we should
have been doing anyway.

This same "poll for tty room" issue is almost certainly also the cause
of excessive kworker activity when idle reported by Dave Jones, who also
reported "flush_to_ldisc executing 2500 times a second" back in Nov 2010:

  http://lkml.org/lkml/2010/11/30/592

which is that silly flushing done every timer tick.  Wasting both power
and CPU for no good reason.
Reported-and-tested-by: NAlexander Beregalov <a.beregalov@gmail.com>
Reported-and-tested-by: NSitsofe Wheeler <sitsofe@yahoo.com>
Cc: Greg KH <gregkh@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Make sure dst_release() is not called with error pointer. This is
similar to commit 4910ac6c ("ipv4:
Don't ip_rt_put() an error pointer in RAW sockets.").
Signed-off-by: NBoris Ostrovsky <boris.ostrovsky@amd.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, UV: Fix kdump reboot
  x86, amd-nb: Rename CPU PCI id define for F4
  sound: Add delay.h to sound/soc/codecs/sn95031.c
  x86, mtrr, pat: Fix one cpu getting out of sync during resume
  x86, microcode: Unregister syscore_ops after microcode unloaded
  x86: Stop including <linux/delay.h> in two asm header files

Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Fix rebalance interval calculation
  sched, doc: Beef up load balancing description
  sched: Leave sched_setscheduler() earlier if possible, do not disturb SCHED_FIFO tasks

Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf: Fix task_struct reference leak
  perf: Fix task context scheduling
  perf: mmap 512 kiB by default
  perf: Rebase max unprivileged mlock threshold on top of page size
  perf tools: Fix NO_NEWT=1 python build error
  perf symbols: Properly align symbol_conf.priv_size
  perf tools: Emit clearer message for sys_perf_event_open ENOENT return
  perf tools: Fixup exit path when not able to open events
  perf symbols: Fix vsyscall symbol lookup
  oprofile, x86: Allow setting EDGE/INV/CMASK for counter events

Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  rcu: create new rcu_access_index() and use in mce
  WARN_ON_SMP(): Add comment to explain ({0;})