There are some scnearios where a driver/framework needs to register
interest for a particular cable without specifying the extcon device
name. One such scenario is charger notifications. The platform will
have charger cabel which will be bound to any extcon device. It's
not mandatory for the charger driver to know which extcon device
it should use. This patch enables the support for registering
interest for a cable just by cable name wihtout specifying the
extcon device name
Signed-off-by: Jenny TC <jenny.tc@intel.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>

--
Kernel-doc comment added by MyungJoo Ham

Extcon core doesn't free the memory when we do unregister.
Kfree is added in the remove path as it was missing.
Signed-off-by: anish kumar <anish198519851985@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

There was a case where free and list_del can be called twice
on the same pointer.So fixed it by re-arranging the code and
removing a function which was not needed.
Signed-off-by: anish kumar <anish198519851985@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

This patch add platform data for MUIC device to initialize register
on probe() call because it should unmask interrupt mask register
and initialize some register related to MUIC device.
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

This simplifies the code.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

This driver can be built as a module, add MODULE_LICENSE for it.
For completeness, also adds MODULE_AUTHOR and MODULE_DESCRIPTION.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

On failure, request_any_context_irq() returns a negative value.
On success, it returns either IRQC_IS_HARDIRQ or IRQC_IS_NESTED.

Also ensure adc_jack_probe() return 0 on success.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

Propagate the value returned from extcon_find_cable_index()
instead of -ENODEV. For readability, -EINVAL is returned in place of
the variable.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

Since extcon registers this compat link at device registration
(extcon_dev_register), we should probably remove them at deregistration/cleanup.

Cc: stable@vger.kernel.org
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

If you compile extcon with CONFIG_ANDROID and then load and unload the
module you get a simple oops as the driver does not unregister its
compat class and thus cannot register it again.

Full trace:

root@(none):~# modprobe extcon_class
root@(none):~# rmmod extcon_class
root@(none):~# modprobe extcon_class
------------[ cut here ]------------
WARNING: at fs/sysfs/dir.c:536 sysfs_add_one+0xde/0x100()
sysfs: cannot create duplicate filename '/class/switch'
Modules linked in: extcon_class(+) [last unloaded: extcon_class]
Call Trace:
9f451a00:  [<602a58bc>] printk+0x0/0xa8
9f451a18:  [<60039b43>] warn_slowpath_common+0x93/0xd0
9f451a28:  [<6012c6de>] sysfs_add_one+0xde/0x100
9f451a50:  [<601d3d90>] strcat+0x0/0x40
9f451a68:  [<60039cdc>] warn_slowpath_fmt+0x9c/0xa0
9f451a90:  [<6002fe32>] unblock_signals+0x0/0x84
9f451ab0:  [<60039c40>] warn_slowpath_fmt+0x0/0xa0
9f451ac0:  [<6002fe32>] unblock_signals+0x0/0x84
9f451ae8:  [<6012bd97>] sysfs_pathname.isra.10+0x57/0x70
9f451b00:  [<601d3d90>] strcat+0x0/0x40
9f451b18:  [<6012bd97>] sysfs_pathname.isra.10+0x57/0x70
9f451b48:  [<6012c6de>] sysfs_add_one+0xde/0x100
9f451b78:  [<6012c96f>] create_dir+0x8f/0x100
9f451bc0:  [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class]
9f451bd8:  [<6012cda6>] sysfs_create_dir+0xa6/0x1c0
9f451be8:  [<601d89f1>] kvasprintf+0x81/0xa0
9f451bf8:  [<601cf0f0>] kobject_get+0x0/0x50
9f451c18:  [<601cf396>] kobject_add_internal+0x96/0x280
9f451c60:  [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class]
9f451c78:  [<601cfb93>] kobject_add+0xd3/0x140
9f451cc0:  [<601cfac0>] kobject_add+0x0/0x140
9f451cd0:  [<6002fe32>] unblock_signals+0x0/0x84
9f451cf8:  [<6002fffc>] set_signals+0x29/0x3f
9f451d28:  [<600c1de1>] kmem_cache_alloc+0xe1/0x100
9f451d78:  [<601cffa0>] kobject_create_and_add+0x50/0xa0
9f451da8:  [<601fbe76>] class_compat_register+0x56/0x80
9f451dc8:  [<a085d118>] create_extcon_class+0x88/0xd0 [extcon_class]
9f451de8:  [<a0861010>] extcon_class_init+0x10/0x12 [extcon_class]
9f451df8:  [<600189a8>] do_one_initcall+0x48/0x1f0
9f451e20:  [<60061920>] blocking_notifier_call_chain+0x0/0x20
9f451e30:  [<60061920>] blocking_notifier_call_chain+0x0/0x20
9f451e58:  [<6007e3c3>] sys_init_module+0xa3/0x280
9f451e88:  [<6001e2ad>] handle_syscall+0x8d/0x90
9f451ea8:  [<60033370>] userspace+0x405/0x531
9f451ee8:  [<6001e380>] copy_chunk_to_user+0x0/0x40
9f451ef8:  [<6001e5cd>] do_op_one_page+0x14d/0x220
9f451fd8:  [<6001a355>] fork_handler+0x95/0xa0

---[ end trace dd512cc03fe1c367 ]---
------------[ cut here ]------------
WARNING: at lib/kobject.c:196 kobject_add_internal+0x26e/0x280()
kobject_add_internal failed for switch with -EEXIST, don't try to
register things with the same name in the same directory.
Modules linked in: extcon_class(+) [last unloaded: extcon_class]
Call Trace:
9f451ad0:  [<602a58bc>] printk+0x0/0xa8
9f451ae8:  [<60039b43>] warn_slowpath_common+0x93/0xd0
9f451af8:  [<601cf56e>] kobject_add_internal+0x26e/0x280
9f451b18:  [<601cf140>] kobject_put+0x0/0x70
9f451b20:  [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class]
9f451b38:  [<60039cdc>] warn_slowpath_fmt+0x9c/0xa0
9f451b88:  [<60039c40>] warn_slowpath_fmt+0x0/0xa0
9f451bc0:  [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class]
9f451bd8:  [<6012cda6>] sysfs_create_dir+0xa6/0x1c0
9f451be8:  [<601d89f1>] kvasprintf+0x81/0xa0
9f451bf8:  [<601cf0f0>] kobject_get+0x0/0x50
9f451c18:  [<601cf56e>] kobject_add_internal+0x26e/0x280
9f451c60:  [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class]
9f451c78:  [<601cfb93>] kobject_add+0xd3/0x140
9f451cc0:  [<601cfac0>] kobject_add+0x0/0x140
9f451cd0:  [<6002fe32>] unblock_signals+0x0/0x84
9f451cf8:  [<6002fffc>] set_signals+0x29/0x3f
9f451d28:  [<600c1de1>] kmem_cache_alloc+0xe1/0x100
9f451d78:  [<601cffa0>] kobject_create_and_add+0x50/0xa0
9f451da8:  [<601fbe76>] class_compat_register+0x56/0x80
9f451dc8:  [<a085d118>] create_extcon_class+0x88/0xd0 [extcon_class]
9f451de8:  [<a0861010>] extcon_class_init+0x10/0x12 [extcon_class]
9f451df8:  [<600189a8>] do_one_initcall+0x48/0x1f0
9f451e20:  [<60061920>] blocking_notifier_call_chain+0x0/0x20
9f451e30:  [<60061920>] blocking_notifier_call_chain+0x0/0x20
9f451e58:  [<6007e3c3>] sys_init_module+0xa3/0x280
9f451e88:  [<6001e2ad>] handle_syscall+0x8d/0x90
9f451ea8:  [<60033370>] userspace+0x405/0x531
9f451ee8:  [<6001e380>] copy_chunk_to_user+0x0/0x40
9f451ef8:  [<6001e5cd>] do_op_one_page+0x14d/0x220
9f451fd8:  [<6001a355>] fork_handler+0x95/0xa0

---[ end trace dd512cc03fe1c368 ]---
kobject_create_and_add: kobject_add error: -17
------------[ cut here ]------------
WARNING: at drivers/extcon/extcon_class.c:545
create_extcon_class+0xbc/0xd0 [extcon_class]()
cannot allocate
Modules linked in: extcon_class(+) [last unloaded: extcon_class]
Call Trace:
9f451c80:  [<602a58bc>] printk+0x0/0xa8
9f451c98:  [<60039b43>] warn_slowpath_common+0x93/0xd0
9f451ca0:  [<6002fe32>] unblock_signals+0x0/0x84
9f451ca8:  [<a085d14c>] create_extcon_class+0xbc/0xd0 [extcon_class]
9f451cd0:  [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class]
9f451ce8:  [<60039cdc>] warn_slowpath_fmt+0x9c/0xa0
9f451d20:  [<6002fe32>] unblock_signals+0x0/0x84
9f451d28:  [<60039c40>] warn_slowpath_fmt+0x0/0xa0
9f451d48:  [<6002fffc>] set_signals+0x29/0x3f
9f451d58:  [<601cf172>] kobject_put+0x32/0x70
9f451d78:  [<600c22c3>] kfree+0xb3/0x100
9f451da8:  [<601fbe9a>] class_compat_register+0x7a/0x80
9f451dc8:  [<a085d14c>] create_extcon_class+0xbc/0xd0 [extcon_class]
9f451de8:  [<a0861010>] extcon_class_init+0x10/0x12 [extcon_class]
9f451df8:  [<600189a8>] do_one_initcall+0x48/0x1f0
9f451e20:  [<60061920>] blocking_notifier_call_chain+0x0/0x20
9f451e30:  [<60061920>] blocking_notifier_call_chain+0x0/0x20
9f451e58:  [<6007e3c3>] sys_init_module+0xa3/0x280
9f451e88:  [<6001e2ad>] handle_syscall+0x8d/0x90
9f451ea8:  [<60033370>] userspace+0x405/0x531
9f451ee8:  [<6001e380>] copy_chunk_to_user+0x0/0x40
9f451ef8:  [<6001e5cd>] do_op_one_page+0x14d/0x220
9f451fd8:  [<6001a355>] fork_handler+0x95/0xa0

---[ end trace dd512cc03fe1c369 ]---
FATAL: Error inserting extcon_class
(/lib/modules/3.6.0-rc6-00178-g811315f/kernel/drivers/extcon/extcon_class.ko):
Cannot allocate memory

This patch fixes this.

Cc: stable@vger.kernel.org
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

Rather than re-inventing the wheel we can use the hamming function
to calculate the number of bits set to check for violation of
exclusivity.
Signed-off-by: anish kumar <anish198519851985@gmail.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

With this change now individual drivers can use standard cable
names as below:
static const char *arizona_cable[] = {
    extcon_cable_name[EXTCON_USB],
    extcon_cable_name[EXTCON_USB_HOST],
    "CUSTOM_CABLE"
    NULL,
}
Signed-off-by: anish kumar <anish198519851985@gmail.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

actually we can do returns with error or success with out ret in this function,
so remove the ret variable, and reduce a very little (4byte) space on stack of this function
Signed-off-by: Devendra Naga <develkernel412222@gmail.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

extcon.h header file was included twice.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

Pull arm64 fixes from Catalin Marinas:
 "Main changes:
   - AArch64 Linux compilation fixes following 3.7-rc1 changes
     (MODULES_USE_ELF_RELA, update_vsyscall() prototype)
   - Unnecessary register setting in start_thread() (thanks to Al Viro)
   - ptrace fixes"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: fix alignment padding in assembly code
  arm64: ptrace: use HW_BREAKPOINT_EMPTY type for disabled breakpoints
  arm64: ptrace: make structure padding explicit for debug registers
  arm64: No need to set the x0-x2 registers in start_thread()
  arm64: Ignore memory blocks below PHYS_OFFSET
  arm64: Fix the update_vsyscall() prototype
  arm64: Select MODULES_USE_ELF_RELA
  arm64: Remove duplicate inclusion of mmu_context.h in smp.c

An interesting effect of using the generic version of linkage.h
is that the padding is defined in terms of x86 NOPs, which can have
even more interesting effects when the assembly code looks like this:

ENTRY(func1)
	mov	x0, xzr
ENDPROC(func1)
	// fall through
ENTRY(func2)
	mov	x0, #1
	ret
ENDPROC(func2)

Admittedly, the code is not very nice. But having code from another
architecture doesn't look completely sane either.

The fix is to add arm64's version of linkage.h, which causes the insertion
of proper AArch64 NOPs.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

The min/max call needed to have explicit types on some architectures
(e.g. mn10300). Use clamp_t instead to avoid the warning:

  kernel/sys.c: In function 'override_release':
  kernel/sys.c:1287:10: warning: comparison of distinct pointer types lacks a cast [enabled by default]
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull perf fixes from Ingo Molnar:
 "Assorted small fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf python: Properly link with libtraceevent
  perf hists browser: Add back callchain folding symbol
  perf tools: Fix build on sparc.
  perf python: Link with libtraceevent
  perf python: Initialize 'page_size' variable
  tools lib traceevent: Fix missed freeing of subargs in free_arg() in filter
  lib tools traceevent: Add back pevent assignment in __pevent_parse_format()
  perf hists browser: Fix off-by-two bug on the first column
  perf tools: Remove warnings on JIT samples for srcline sort key
  perf tools: Fix segfault when using srcline sort key
  perf: Require exclude_guest to use PEBS - kernel side enforcement
  perf tool: Precise mode requires exclude_guest

Namhyung Kim reported that the build fails with:

  GEN python/perf.so
  gcc: error: python_ext_build/tmp//../../libtraceevent.a: No such file or directory
  error: command 'gcc' failed with exit status 1
  cp: cannot stat `python_ext_build/lib/perf.so': No such file or directory
  make: *** [python/perf.so] Error 1

We need to propagate the TE_PATH variable to the setup.py file.
Reported-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/n/tip-8umiPbm4sxpknKivbjgykhut@git.kernel.org
[ Fixed superfluous variable build error. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

* The python binding needs to link with libtraceevent and to initialize
  the 'page_size' variable so that mmaping works again.

* The callchain folding character that appears on the TUI just before
  the overhead had disappeared due to recent changes, add it back.

* Intel PEBS in VT-x context uses the DS address as a guest linear address,
  even though its programmed by the host as a host linear address. This either
  results in guest memory corruption and or the hardware faulting and 'crashing'
  the virtual machine.  Therefore we have to disable PEBS on VT-x enter and
  re-enable on VT-x exit, enforcing a strict exclude_guest.

  Kernel side enforcement fix by Peter Zijlstra, tooling side fix by David Ahern.

* Fix build on sparc due to UAPI, fix from David Miller.

* Fixes for the srclike sort key for unresolved symbols and when processing
  samples in JITted code, where we don't have an ELF file, just an special
  symbol table, fixes from Namhyung Kim.

* Fix some leaks in libtraceevent, from Steven Rostedt.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

Pull ARM soc fixes from Olof Johansson:
 "A set of fixes and some minor cleanups for -rc2:

   - A series from Arnd that fixes warnings in drivers and other code
     included by ARM defconfigs.  Most have been acked by corresponding
     maintainers (and seem quite hard to argue not picking up anyway in
     the few exception cases).
   - A few misc patches from the list for integrator/vt8500/i.MX
   - A batch of fixes to OMAP platforms, fixing:
     - boot problems on beaglebone,
     - regression fixes for local timers
     - clockdomain locking fixes
     - a few boot/sparse warnings
   - For Tegra:
     - Clock rate calculation overflow fix
     - Revert a change that removed timer clocks and a fix for symbol
       name clashes
   - For Renesas:
     - IO accessor / annotation cleanups to remove warnings
   - For Kirkwood/Dove/mvebu:
     - Fixes for device trees for Dove (some minor cleanups, some fixes)
     - Fixes for the mvebu gpio driver
     - Fix build problem for Feroceon due to missing ifdefs
     - Fix lsxl DTS files"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (31 commits)
  ARM: kirkwood: fix buttons on lsxl boards
  ARM: kirkwood: fix LEDs names for lsxl boards
  ARM: Kirkwood: fix disabling CACHE_FEROCEON_L2
  gpio: mvebu: Add missing breaks in mvebu_gpio_irq_set_type
  ARM: dove: Add crypto engine to DT
  ARM: dove: Remove watchdog from DT
  ARM: dove: Restructure SoC device tree descriptor
  ARM: dove: Fix clock names of sata and gbe
  ARM: dove: Fix tauros2 device tree init
  ARM: dove: Add pcie clock support
  ARM: OMAP2+: Allow kernel to boot even if GPMC fails to reserve memory
  ARM: OMAP: clockdomain: Fix locking on _clkdm_clk_hwmod_enable / disable
  ARM: s3c: mark s3c2440_clk_add as __init_refok
  spi/s3c64xx: use correct dma_transfer_direction type
  ARM: OMAP4: devices: fixup OMAP4 DMIC platform device error message
  ARM: OMAP2+: clock data: Add dev-id for the omap-gpmc dummy fck
  ARM: OMAP: resolve sparse warning concerning debug_card_init()
  ARM: OMAP4: Fix twd_local_timer_register regression
  ARM: tegra: add tegra_timer clock
  ARM: tegra: rename tegra system timer
  ...

Emit the magic string that indicates a module has a signature after the
signature data instead of before it.  This allows module_sig_check() to
be made simpler and faster by the elimination of the search for the
magic string.  Instead we just need to do a single memcmp().

This works because at the end of the signature data there is the
fixed-length signature information block.  This block then falls
immediately prior to the magic number.

From the contents of the information block, it is trivial to calculate
the size of the signature data and thus the size of the actual module
data.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

From Jason Cooper:
 - improve #ifdef logic to prevent linker errors with CACHE_FEROCEON_L2
 - lsxl board dts fixes

* tag 'kirkwood_fixes_for_v3.7' of git://git.infradead.org/users/jcooper/linux:
  ARM: kirkwood: fix buttons on lsxl boards
  ARM: kirkwood: fix LEDs names for lsxl boards
  ARM: Kirkwood: fix disabling CACHE_FEROCEON_L2

The module build process no longer creates intermediate files for module
signing, so remove them from .gitignore.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Turn sign-file into perl and merge in x509keyid.  The latter doesn't
need to be a separate script as it doesn't actually need to work out the
SHA1 sum of the X.509 certificate itself, since it can get that from the
X.509 certificate.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge branch 'testing/driver-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into fixes

A collection of warning fixes on non-ARM code from Arnd Bergmann:

* 'testing/driver-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: s3c: mark s3c2440_clk_add as __init_refok
  spi/s3c64xx: use correct dma_transfer_direction type
  pcmcia: sharpsl: don't discard sharpsl_pcmcia_ops
  USB: EHCI: mark ehci_orion_conf_mbus_windows __devinit
  mm/slob: use min_t() to compare ARCH_SLAB_MINALIGN
  SCSI: ARM: make fas216_dumpinfo function conditional
  SCSI: ARM: ncr5380/oak uses no interrupts

  /proc/<pid>/numa_maps scans vma and show mempolicy under
  mmap_sem. It sometimes accesses task->mempolicy which can
  be freed without mmap_sem and numa_maps can show some
  garbage while scanning.

This patch tries to take reference count of task->mempolicy at reading
numa_maps before calling get_vma_policy(). By this, task->mempolicy
will not be freed until numa_maps reaches its end.

V2->v3
  -  updated comments to be more verbose.
  -  removed task_lock() in numa_maps code.
V1->V2
  -  access task->mempolicy only once and remember it.  Becase kernel/exit.c
     can overwrite it.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull miscellaneous x86 fixes from Peter Anvin:
 "The biggest ones are fixing suspend/resume breakage on 32 bits, and an
  interrim fix for mapping over holes that allows AMD kit with more than
  1 TB.

  A final solution for the latter is in the works, but involves some
  fairly invasive changes that will probably mean it will only be
  appropriate for 3.8."

* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, MCE: Remove bios_cmci_threshold sysfs attribute
  x86, amd, mce: Avoid NULL pointer reference on CPU northbridge lookup
  x86: Exclude E820_RESERVED regions and memory holes above 4 GB from direct mapping.
  x86/cache_info: Use ARRAY_SIZE() in amd_l3_attrs()
  x86/reboot: Remove quirk entry for SBC FITPC
  x86, suspend: Correct the restore of CR4, EFER; skip computing EFLAGS.ID

Merge misc fixes from Andrew Morton:
 "Seven fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (7 patches)
  lib/dma-debug.c: fix __hash_bucket_find()
  mm: compaction: correct the nr_strict va isolated check for CMA
  firmware/memmap: avoid type conflicts with the generic memmap_init()
  pidns: remove recursion from free_pid_ns()
  drivers/video/backlight/lm3639_bl.c: return proper error in lm3639_bled_mode_store() error paths
  kernel/sys.c: fix stack memory content leak via UNAME26
  linux/coredump.h needs asm/siginfo.h

If there is only one match, the unique matched entry should be returned.

Without the fix, the upcoming dma debug interfaces ("dma-debug: new
interfaces to debug dma mapping errors") can't work reliably because
only device and dma_addr are passed to dma_mapping_error().
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Joerg Roedel <joerg.roedel@amd.com>
Tested-by: Shuah Khan <shuah.khan@hp.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Jakub Kicinski <kubakici@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Thierry reported that the "iron out" patch for isolate_freepages_block()
had problems due to the strict check being too strict with "mm:
compaction: Iron out isolate_freepages_block() and
isolate_freepages_range() -fix1".  It's possible that more pages than
necessary are isolated but the check still fails and I missed that this
fix was not picked up before RC1.  This same problem has been identified
in 3.7-RC1 by Tony Prisk and should be addressed by the following patch.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Tested-by: Tony Prisk <linux@prisktech.co.nz>
Reported-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Richard Davies <richard@arachsys.com>
Cc: Shaohua Li <shli@kernel.org>
Cc: Avi Kivity <avi@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Fix this build error:

  drivers/firmware/memmap.c:240:19: error: conflicting types for 'memmap_init'
  arch/ia64/include/asm/pgtable.h:565:17: note: previous declaration of 'memmap_init' was here
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Bernhard Walle <bwalle@suse.de>
Cc: Glauber Costa <glommer@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

free_pid_ns() operates in a recursive fashion:

free_pid_ns(parent)
  put_pid_ns(parent)
    kref_put(&ns->kref, free_pid_ns);
      free_pid_ns

thus if there was a huge nesting of namespaces the userspace may trigger
avalanche calling of free_pid_ns leading to kernel stack exhausting and a
panic eventually.

This patch turns the recursion into an iterative loop.

Based on a patch by Andrew Vagin.

[akpm@linux-foundation.org: export put_pid_ns() to modules]
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Andrew Vagin <avagin@openvz.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Calling uname() with the UNAME26 personality set allows a leak of kernel
stack contents.  This fixes it by defensively calculating the length of
copy_to_user() call, making the len argument unsigned, and initializing
the stack buffer to zero (now technically unneeded, but hey, overkill).

CVE-2012-0957
Reported-by: PaX Team <pageexec@freemail.hu>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: PaX Team <pageexec@freemail.hu>
Cc: Brad Spengler <spender@grsecurity.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Commit 5ab1c309 ("coredump: pass siginfo_t* to do_coredump() and
below, not merely signr") added siginfo_t to linux/coredump.h but forgot
to include asm/siginfo.h.  This breaks the build for UML/i386.  (And any
other arch where asm/siginfo.h is not magically preincluded...)

  In file included from arch/x86/um/elfcore.c:2:0: include/linux/coredump.h:15:25: error: unknown type name 'siginfo_t'
  make[1]: *** [arch/x86/um/elfcore.o] Error 1
Signed-off-by: Richard Weinberger <richard@nod.at>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Amerigo Wang <amwang@redhat.com>
Cc: "Jonathan M. Foote" <jmfoote@cert.org>
Cc: Roland McGrath <roland@hack.frob.com>
Cc: Pedro Alves <palves@redhat.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

In commit 0b173bc4 ("mm: kill vma flag VM_CAN_NONLINEAR") we
replaced the VM_CAN_NONLINEAR test with checking whether the mapping has
a '->remap_pages()' vm operation, but there is no guarantee that there
it even has a vm_ops pointer at all.

Add the appropriate test for NULL vm_ops.
Reported-by: Sasha Levin <levinsasha928@gmail.com>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull Xtensa patchset from Chris Zankel:
 "These are all limited to the xtensa subtree and include some important
  changes (adding long missing system calls for newer libc versions and
  other fixes) and the UAPI changes"

* tag 'xtensa-next-20121018' of git://github.com/czankel/xtensa-linux:
  xtensa: add missing system calls to the syscall table
  xtensa: minor compiler warning fix
  xtensa: Use Kbuild infrastructure to handle asm-generic headers
  UAPI: (Scripted) Disintegrate arch/xtensa/include/asm
  xtensa: fix unaligned usermode access
  xtensa: reorganize SR referencing
  xtensa: fix boot parameters parsing
  xtensa: fix missing return in do_page_fault for SIGBUS case
  xtensa: copy_thread with CLONE_VM must not copy live parent AR windows
  xtensa: fix memmove(), bcopy(), and memcpy().
  xtensa: ISS: fix rs_put_char
  xtensa: ISS: fix specific simcalls