fscache_submit_exclusive_op() adds an operation to the pending list if
other operations are pending.  Fix the check for pending ops as n_ops
must be greater than 0 at the point it is checked as it is incremented
immediately before under lock.
Signed-off-by: NAkshat Aranya <aranya@nec-labs.com>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Merge branch 'vfs-scale-working' of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin

* 'vfs-scale-working' of git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin:
  kernel: fix hlist_bl again
  cgroups: Fix a lockdep warning at cgroup removal
  fs: namei fix ->put_link on wrong inode in do_filp_open

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (59 commits)
  mfd: ab8500-core chip version cut 2.0 support
  mfd: Flag WM831x /IRQ as a wake source
  mfd: Convert WM831x away from legacy I2C PM operations
  regulator: Support MAX8998/LP3974 DVS-GPIO
  mfd: Support LP3974 RTC
  i2c: Convert SCx200 driver from using raw PCI to platform device
  x86: OLPC: convert olpc-xo1 driver from pci device to platform device
  mfd: MAX8998/LP3974 hibernation support
  mfd/ab8500: remove spi support
  mfd: Remove ARCH_U8500 dependency from AB8500
  misc: Make AB8500_PWM driver depend on U8500 due to PWM breakage
  mfd: Add __devexit annotation for vx855_remove
  mfd: twl6030 irq_data conversion.
  gpio: Fix cs5535 printk warnings
  misc: Fix cs5535 printk warnings
  mfd: Convert Wolfson MFD drivers to use irq_data accessor function
  mfd: Convert TWL4030 to new irq_ APIs
  mfd: Convert tps6586x driver to new irq_ API
  mfd: Convert tc6393xb driver to new irq_ APIs
  mfd: Convert t7166xb driver to new irq_ API
  ...

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] MAINTAINERS: Update zcrypt driver entry
  [S390] Randomize PIEs
  [S390] Randomise the brk region
  [S390] Add is_32bit_task() helper function
  [S390] Randomize lower bits of stack address
  [S390] Randomize mmap start address
  [S390] Rearrange mmap.c
  [S390] Enable flexible mmap layout for 64 bit processes
  [S390] vdso: dont map at mmap_base
  [S390] reduce miminum gap between stack and mmap_base
  [S390] mmap: consider stack address randomization
  [S390] Update default configuration
  [S390] cio: path_event overindication after resume

Commit a1f5f22a ("gpio: timbgpio:
irq_data conversion") was slightly too enthusiastic in converting
timbgpio_irq() over to take an irq_data * argument instead of an
unsigned int irq argument, as it is a flow handler, which still take
IRQ numbers for now.  (And on top of that, it was using the wrong
accessors.)

This fixes it up, and seems to build without warnings.
Signed-off-by: NLennert Buytenhek <buytenh@secretlab.ca>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Richard Röjfors <richard.rojfors@mocean-labs.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

cgroup can't use simple_lookup(), since that'd override its desired ->d_op.
Tested-by: NLi Zefan <lizf@cn.fujitsu.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit 5f829e40 (gpiolib: add missing functions
to generic fallback) also introduced two.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Cc: Greg KH <gregkh@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The flags added by commit db16d5ec
has no user now. We believe we'll use it soon but considering
patch reviewing, the change itself should be folded into incoming
set of "dirty ratio for memcg" patches.

So, it's better to drop this change from current mainline tree.
Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: NGreg Thelen <gthelen@google.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Subjct: Revert memory cgroup dirty_ratio Documentation.

The commit ece72400 adds documentation
for memcg's dirty ratio. But the function is not implemented yet.
Remove the documentation for avoiding confusing users.
Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: NGreg Thelen <gthelen@google.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

__d_rehash is dereferencing an almost-NULL pointer on my ARM926.
CONFIG_SMP=n and CONFIG_DEBUG_SPINLOCK=y.

The faulting instruction is:    strne   r3, [r2, #4]
and as can be seen from the register dump below, r2 is 0x00000001, hence
the faulting 0x00000005 address.

__d_rehash is essentially:

       spin_lock_bucket(b);
       entry->d_flags &= ~DCACHE_UNHASHED;
       hlist_bl_add_head_rcu(&entry->d_hash, &b->head);
       spin_unlock_bucket(b);

which is:

       bit_spin_lock(0, (unsigned long *)&b->head.first);
       entry->d_flags &= ~DCACHE_UNHASHED;
       hlist_bl_add_head_rcu(&entry->d_hash, &b->head);
       __bit_spin_unlock(0, (unsigned long *)&b->head.first);

bit_spin_lock(0, ptr) sets bit 0 of *ptr, in this case b->head.first if
CONFIG_SMP or CONFIG_DEBUG_SPINLOCK is set:

#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
       while (unlikely(test_and_set_bit_lock(bitnum, addr))) {
               while (test_bit(bitnum, addr)) {
                       preempt_enable();
                       cpu_relax();
                       preempt_disable();
               }
       }
#endif

So, b->head.first starts off NULL, and becomes a non-NULL (address 1).
hlist_bl_add_head_rcu() does this:

static inline void hlist_bl_add_head_rcu(struct hlist_bl_node *n,
                                       struct hlist_bl_head *h)
{
       first = hlist_bl_first(h);
       n->next = first;
       if (first)
               first->pprev = &n->next;

It is the store to first->pprev which is faulting.

hlist_bl_first():

static inline struct hlist_bl_node *hlist_bl_first(struct hlist_bl_head *h)
{
       return (struct hlist_bl_node *)
               ((unsigned long)h->first & ~LIST_BL_LOCKMASK);
}

but:
#if defined(CONFIG_SMP)
#define LIST_BL_LOCKMASK        1UL
#else
#define LIST_BL_LOCKMASK        0UL
#endif

So, we have one piece of code which sets bit 0 of addresses, and another
bit of code which doesn't clear it before dereferencing the pointer if
!CONFIG_SMP && CONFIG_DEBUG_SPINLOCK.  With the patch below, I can again
sucessfully boot the kernel on my Versatile PB/926 platform.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This patch adds support for chip version 2.0 or cut 2.0.
One new interrupt latch register - latch 12 - is introduced.
Signed-off-by: NMattias Wallin <mattias.wallin@stericsson.com>
Acked-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The WM831x can generate wake events, some unconditionally, so flag
the primary IRQ as a wake source in order to help the CPU treat the
/IRQ signal appropriately.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Since the legacy bus PM operations are deprecated move the suspend
method over to dev_pm_ops.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The previous driver did not support BUCK1-DVS3, BUCK1-DVS4, and
BUCK2-DVS2 modes. This patch adds such modes and an option to block
setting buck1/2 voltages out of the preset values.
Signed-off-by: NMyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The first releases of LP3974 have a large delay in RTC registers,
which requires 2 seconds of delay after writing to a rtc register
(recommended by National Semiconductor's engineers)
before reading it.

If "rtc_delay" field of the platform data is true, the rtc driver
assumes that such delays are required. Although we have not seen
LP3974s without requiring such delays, we assume that such LP3974s
will be released soon (or they have done so already) and they are
supported by "lp3974" without setting "rtc_delay" at the platform
data.

This patch adds delays with msleep when writing values to RTC registers
if the platform data has rtc_delay set.
Signed-off-by: NMyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The SCx200 ACB driver supports ISA hardware as well as PCI.  The PCI
hardware is CS5535/CS5536 based, and the device that it grabs is handled by
the cs5535-mfd driver. This converts the SCx200 driver to use a
platform_driver rather than the previous PCI hackery.

The driver used to manually track the iface list (via linked list); now it
only does this for ISA devices.  PCI ifaces are handled through standard
driver model lists.

It's unclear what happens in case of errors in the old ISA code; rather than
pretending the code actually cares, I've dropped the (implicit) ignorance
of return values and marked it with a comment.
Signed-off-by: NAndres Salomon <dilinger@queued.net>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The cs5535-mfd driver now takes care of the PCI BAR handling; this
means the olpc-xo1 driver shouldn't be touching the PCI device at all.

This patch uses both cs5535-acpi and cs5535-pms platform devices rather
than a single platform device because the cs5535-mfd driver may be used
by other CS5535 platform-specific drivers; OLPC doesn't get to dictate
that ACPI and PMS will always be used together.
Signed-off-by: NAndres Salomon <dilinger@queued.net>
Acked-by: NH. Peter Anvin <hpa@zytor.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This patch makes the driver to save and restore register values
for hibernation.
Signed-off-by: NMyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Since the Ab8500 v1.0, the SPI support is deprecated on the HW.
Signed-off-by: NSundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

While it is vanishingly unlikely that the device will be deployed on other
architectures removing the dependency facilitates build testing when doing
generic work on both the MFD core for the device and the subsystem drivers.

There appears to be no actual code dependency.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Since we don't have a PWM API every PWM driver ends up exporting its
own version and we need to limit the platforms we try to build them on
in order to avoid multiple definitions. As the AB8500 is normally a
companion chip for the U8500 CPU depend on that architecture.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NHarald Welte <HaraldWelte@viatech.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Signed-off-by: NLennert Buytenhek <buytenh@secretlab.ca>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

drivers/gpio/cs5535-gpio.c: In function 'cs5535_gpio_probe':
drivers/gpio/cs5535-gpio.c:269: warning: format '%x' expects type 'unsigned int', but argument 3 has type 'resource_size_t'
drivers/gpio/cs5535-gpio.c:269: warning: format '%x' expects type 'unsigned int', but argument 4 has type 'resource_size_t'

Use vsprintf extension %pR to format resource.
Original-patch-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

drivers/misc/cs5535-mfgpt.c: In function 'cs5535_mfgpt_probe':
drivers/misc/cs5535-mfgpt.c:320: warning: format '%x' expects type 'unsigned int', but argument 3 has type 'resource_size_t'
drivers/misc/cs5535-mfgpt.c:320: warning: format '%x' expects type 'unsigned int', but argument 4 has type 'resource_size_t'

Use vsprintf extension %pR to format resource.
Original-patch-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Actually makes the code larger rathe rthan smaller but does provide some
isolation against core API changes.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being updated to pass struct irq_data to irq_chip
operations. Update the TWL4030 driver to the new APIs.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being updated to supply struct irq_data to irq_chip
operations rather than an irq number. Update the tps6586x driver to the
new APIs.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being update to pass struct irq_data to irq_chip rather
than an irq number to operations. Update tc6393 to the new API.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NIan Molton <ian@mnementh.co.uk>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being updated to pass struct irq_data rather than an
irq number to irq_chip operations. Update the t7166xb driver to the new
APIs.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NIan Molton <ian@mnementh.co.uk>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being updated to supply struct irq_data to irq_chip
operations rather than an irq number. Update the SMTPE driver to the new
APIs.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NRabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being updated to pass struct irq_data to interrupt
operations, update the MAX8998 driver to the new API.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq infrastructure is being converted to pass struct irq_data rather
than an irq number to irq_chip operations, update max8925 to the new APIs.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Convert the jz4740-adc driver to use the recently introduced IRQ API
variants which are passed struct irq_data rather than an IRQ number.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being converted to pass a struct irq_data to interrupt
operations rather than an IRQ number.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NCory Maccarrone <darkstar6262@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being converted to pass a struct irq_data to interrupt
operations rather than an IRQ number.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Signed-off-by: NLennert Buytenhek <buytenh@secretlab.ca>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being converted to supply struct irq_data to chips
rather than the interrupt number.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NMattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The genirq core is being updated to pass struct irq_data rather than irq
numbers into chip drivers. As part of the update assignments to NULL for
unused operations are removed, these are not needed and the genirq docs
should be good enough.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NMattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The interrupt controller APIs are being updated to pass a struct irq_data
rather than the interrupt number.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NIan Molton <ian@mnementh.co.uk>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>