I'm running a workload which triggers a lot of swap in a machine with 4
nodes.  After I kill the workload, I found a kswapd livelock.  Sometimes
kswapd3 or kswapd2 are keeping running and I can't access filesystem,
but most memory is free.

This looks like a regression since commit 08951e54 ("mm: vmscan:
correct check for kswapd sleeping in sleeping_prematurely").

Node 2 and 3 have only ZONE_NORMAL, but balance_pgdat() will return 0
for classzone_idx.  The reason is end_zone in balance_pgdat() is 0 by
default, if all zones have watermark ok, end_zone will keep 0.

Later sleeping_prematurely() always returns true.  Because this is an
order 3 wakeup, and if classzone_idx is 0, both balanced_pages and
present_pages in pgdat_balanced() are 0.  We add a special case here.
If a zone has no page, we think it's balanced.  This fixes the livelock.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Assume that /sys/kernel/debug/dummy64 is debugfs file created by
debugfs_create_x64().

	# cd /sys/kernel/debug
	# echo 0x1234567812345678 > dummy64
	# cat dummy64
	0x0000000012345678

	# echo 0x80000000 > dummy64
	# cat dummy64
	0xffffffff80000000

A value larger than INT_MAX cannot be written to the debugfs file created
by debugfs_create_u64 or debugfs_create_x64 on 32bit machine.  Because
simple_attr_write() uses simple_strtol() for the conversion.

To fix this, use simple_strtoll() instead.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  vfs: fix race in rcu lookup of pruned dentry
  Fix cifs_get_root()

[ Edited the last commit to get rid of a 'unused variable "seq"'
  warning due to Al editing the patch.  - Linus ]

Don't update *inode in __follow_mount_rcu() until we'd verified that
there is mountpoint there.  Kudos to Hugh Dickins for catching that
one in the first place and eventually figuring out the solution (and
catching a braino in the earlier version of patch).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  pppoe: Must flush connections when MAC address changes too.
  include/linux/sdla.h: remove the prototype of sdla()
  tulip: dmfe: Remove old log spamming pr_debugs

Kernel bugzilla: 39252
Signed-off-by: David S. Miller <davem@davemloft.net>

`make headers_check` complains that

linux-2.6/usr/include/linux/sdla.h:116: userspace cannot reference
function or variable defined in the kernel

this is due to that there is no such a kernel function,

void sdla(void *cfg_info, char *dev, struct frad_conf *conf, int quiet);

I don't know why we have it in a kernel header, so remove it.
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add missing ->i_mutex, convert to lookup_one_len() instead of
(broken) open-coded analog, cope with getting something like
a//b as relative pathname.  Simplify the hell out of it, while
we are there...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Reviewed-by: Jeff Layton <jlayton@redhat.com>

Commit 726b65ad ("tulip: Convert uses of KERN_DEBUG") enabled
some old previously inactive uses of pr_debug converted by
commit dde7c8ef ("tulip/dmfe.c: Use dev_<level> and pr_<level>").

Remove these pr_debugs.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While compiling it with Fedora 15, I noticed this issue:

  inlined from ‘si4713_write_econtrol_string’ at drivers/media/radio/si4713-i2c.c:1065:24:
  arch/x86/include/asm/uaccess_32.h:211:26: error: call to ‘copy_from_user_overflow’ declared with attribute error: copy_from_user() buffer size is not provably correct

Cc: stable@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Reviewed-by: Eugene Teo <eugeneteo@kernel.sg>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ASoC: Correct WM8994 MICBIAS supply widget hookup
  ASoC: Fix shift in WM8958 accessory detection default implementation
  ASoC: sh: fsi-hdmi: fixup snd_soc_card name
  ASoC: sh: fsi-da7210: fixup snd_soc_card name
  ASoC: sh: fsi-ak4642: fixup snd_soc_card name

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  hppfs_lookup(): don't open-code lookup_one_len()
  hppfs: fix dentry leak
  cramfs: get_cramfs_inode() returns ERR_PTR() on failure
  ufs should use d_splice_alias()
  fix exofs ->get_parent()
  ceph analog of cifs build_path_from_dentry() race fix
  cifs: build_path_from_dentry() race fix

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  hwmon: (max1111) Fix race condition causing NULL pointer exception
  hwmon: (it87) Fix label group removal
  hwmon: (asus_atk0110) Fix memory leak

... and it's getting it wrong, too - missing ->d_revalidate() calls when
it's dealing with filesystem (procfs) that has non-trivial ->d_revalidate()...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

... and we want to report these failures in ->lookup() anyway.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

it's NFS-exportable, so...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

NULL is not a possible return value for that method, TYVM...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  [CIFS] update cifs to version 1.74
  [CIFS] update limit for snprintf in cifs_construct_tcon
  cifs: Fix signing failure when server mandates signing for NTLMSSP

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  Bluetooth: Fix crash with incoming L2CAP connections
  Bluetooth: Fix regression in L2CAP connection procedure
  gianfar: rx parser
  r6040: only disable RX interrupt if napi_schedule_prep is successful
  net: remove NETIF_F_ALL_TX_OFFLOADS
  net: sctp: fix checksum marking for outgoing packets

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  watchdog: hpwdt depends on PCI
  watchdog: fix hpwdt Kconfig regression in 3.0-rc

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6:
  [media] tuner-core: fix a 2.6.39 regression with mt20xx
  [media] dvb_frontend: fix race condition in stopping/starting frontend
  [media] media: fix radio-sf16fmr2 build when SND is not enabled
  [media] MEDIA: Fix non-ISA_DMA_API link failure of sound code
  [media] nuvoton-cir: make idle timeout more sane
  [media] mceusb: increase default timeout to 100ms
  [media] mceusb: Timeout unit corrections
  [media] Revert "V4L/DVB: cx23885: Enable Message Signaled Interrupts(MSI)"

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: Fixes device power states array overflow
  ACPI, APEI, HEST, Detect duplicated hardware error source ID
  ACPI: Fix lockdep false positives in acpi_power_off()

* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM / MIPS: Convert i8259.c to using syscore_ops

Merge branch 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung

* 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: SAMSUNG: DMA Cleanup as per sparse
  ARM: SAMSUNG: Check NULL return from irq_alloc_generic_chip

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc: sun4m SMP: fix wrong shift instruction in IPI handler
  sparc32,leon: Added __init declaration to leon_flush_needed()
  sparc/irqs: Do not trace arch_local_{*,irq_*} functions

spi_sync call uses its spi_message parameter to keep completion information,
using a drvdata structure is not thread-safe. Use a mutex to prevent
multiple access to shared driver data.
Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Cyril Hrubis <metan@ucw.cz>
Tested-by: Stanislav Brabec <utx@penguin.cz>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org

A copy-and-paste error caused it87_attributes_vid to be referenced
where it87_attributes_label should be. Thankfully the group is only
used for attribute removal, not attribute creation, so the effects of
this bug are limited, but let's fix it still.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>

The object returned by atk_gitm is dynamically allocated and must be
freed.
Signed-off-by: Luca Tettamanti <kronos.it@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org

hpwdt is a PCI driver so it should depend on PCI.
Fixes these build errors:

drivers/watchdog/hpwdt.c:762: error: implicit declaration of function 'pci_iomap'
drivers/watchdog/hpwdt.c:762: warning: assignment makes pointer from integer without a cast
drivers/watchdog/hpwdt.c:797: error: implicit declaration of function 'pci_iounmap'
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: Thomas Mingarelli <thomas.mingarelli@hp.com>

The WM8994 and WM8958 series of devices have two MICBIAS supplies rather
than one, the current widget actually manages the microphone detection
control register bit (which is managed separately by the relevant API).

Fix this, hooking the relevant supplies up to the MICBIAS1 and MICBIAS2
widgets.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org

... unfortunately, cifs bug got copied.  Fix is essentially the same.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

deal with d_move() races properly; rename_lock read-retry loop,
rcu_read_lock() held while walking to root, d_lock held over
subtraction from namelen and copying the component to stabilize
->d_name.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

This shift instruction appears to be shifting in the wrong direction.
Without this change, my SparcStation-20MP hangs just after bringing up
the second CPU:

Entering SMP Mode...
Starting CPU 2 at f02b4e90
Brought up 2 CPUs
Total of 2 processors activated (99.52 BogoMIPS).
   *** stuck ***
Signed-off-by: Will Simoneau <simoneau@ele.uri.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>

Another regression fix considering incomming l2cap connections with
defer_setup enabled. In situations when incomming connection is
extracted with l2cap_sock_accept, it's bt_sock info will have
'parent' member zerroed, but 'parent' may be used unconditionally
in l2cap_conn_start() and l2cap_security_cfm() when defer_setup
is enabled.

Backtrace:
[<bf02d5ac>] (l2cap_security_cfm+0x0/0x2ac [bluetooth]) from [<bf01f01c>] (hci_event_pac
ket+0xc2c/0x4aa4 [bluetooth])
[<bf01e3f0>] (hci_event_packet+0x0/0x4aa4 [bluetooth]) from [<bf01a844>] (hci_rx_task+0x
cc/0x27c [bluetooth])
[<bf01a778>] (hci_rx_task+0x0/0x27c [bluetooth]) from [<c008eee4>] (tasklet_action+0xa0/
0x15c)
[<c008ee44>] (tasklet_action+0x0/0x15c) from [<c008f38c>] (__do_softirq+0x98/0x130)
 r7:00000101 r6:00000018 r5:00000001 r4:efc46000
[<c008f2f4>] (__do_softirq+0x0/0x130) from [<c008f524>] (do_softirq+0x4c/0x58)
[<c008f4d8>] (do_softirq+0x0/0x58) from [<c008f5e0>] (run_ksoftirqd+0xb0/0x1b4)
 r4:efc46000 r3:00000001
[<c008f530>] (run_ksoftirqd+0x0/0x1b4) from [<c009f2a8>] (kthread+0x84/0x8c)
 r7:00000000 r6:c008f530 r5:efc47fc4 r4:efc41f08
[<c009f224>] (kthread+0x0/0x8c) from [<c008cc84>] (do_exit+0x0/0x5f0)
Signed-off-by: Ilia Kolomisnky <iliak@ti.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: David S. Miller <davem@davemloft.net>

Caused by the following commit, partially revert it.

commit 9fa7e4f7
Author: Gustavo F. Padovan <padovan@profusion.mobi>
Date:   Thu Jun 30 16:11:30 2011 -0300

    Bluetooth: Fix regression with incoming L2CAP connections

    PTS test A2DP/SRC/SRC_SET/TC_SRC_SET_BV_02_I revealed that
    ( probably after the df3c3931 commit ) the l2cap connection
    could not be established in case when the "Auth Complete" HCI
    event does not arive before the initiator send "Configuration
    request", in which case l2cap replies with "Command rejected"
    since the channel is still in BT_CONNECT2 state.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: David S. Miller <davem@davemloft.net>

Function declaration differs between file: dma.c and file:dma.h
and SPARSE (Documentation/sparse.txt) gives error messages

All dma channels are members of 'enum dma_ch' and not 'unsigned int'
Please have a look at channel definitions in:
arch/arm/mach-s3c64xx/include/mach/dma.h
arch/arm/plat-samsung/include/plat/s3c-dma-pl330.h
arch/arm/mach-s3c2410/include/mach/dma.h
So all arguments should be of type 'enum dma_ch'
Signed-off-by: Sangwook Lee <sangwook.lee@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

Remove Kconfig regression caused by commit
a4616153 "watchdog: hpwdt: build hpwdt as
module by default with NMI_DECODING enabled"

With the above change applied, hpwdt will be enabled unconditionally by just
entering the Watchdog subscreen in menuconfig. Since this driver is not
essential to boot any box it should remain disabled until it gets manually
enabled, just like all other drivers.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Cc: Tony Camuso <tcamuso@redhat.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

* 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6:
  gpio: wm831x: add a missing break in wm831x_gpio_dbg_show