11 years agosecurity.h: fix build failure
Alexander Beregalov [Sun, 17 Aug 2008 01:34:20 +0000]
security.h: fix build failure

security.h: fix build failure

include/linux/security.h: In function 'security_ptrace_traceme':
include/linux/security.h:1760: error: 'parent' undeclared (first use in this function)

Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: James Morris <jmorris@namei.org>

11 years agoremoved unused #include <version.h>
Huang Weiyi [Sat, 16 Aug 2008 23:51:05 +0000]
removed unused #include <version.h>

The drivers below do not use LINUX_VERSION_CODE nor KERNEL_VERSION.
  drivers/char/pcmcia/ipwireless/tty.c
  drivers/char/synclink_gt.c
  drivers/char/xilinx_hwicap/xilinx_hwicap.c

This patch removes the said #include <version.h>.

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoMerge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 17 Aug 2008 00:16:07 +0000]
Merge branch 'core-fixes-for-linus' of git://git./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:
  lockdep: fix build if CONFIG_PROVE_LOCKING not defined
  lockdep: use WARN() in kernel/lockdep.c
  lockdep: spin_lock_nest_lock(), checkpatch fixes
  lockdep: build fix

11 years agoMerge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 17 Aug 2008 00:15:32 +0000]
Merge branch 'sched-fixes-for-linus' of git://git./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: scale sysctl_sched_shares_ratelimit with nr_cpus
  sched: fix rt-bandwidth hotplug race
  sched: fix the race between walk_tg_tree and sched_create_group

11 years agoMerge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 17 Aug 2008 00:14:07 +0000]
Merge branch 'x86-fixes-for-linus' of git://git./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: (32 commits)
  x86: add MAP_STACK mmap flag
  x86: fix section mismatch warning - spp_getpage()
  x86: change init_gdt to update the gdt via write_gdt, rather than a direct write.
  x86-64: fix overlap of modules and fixmap areas
  x86, geode-mfgpt: check IRQ before using MFGPT as clocksource
  x86, acpi: cleanup, temp_stack is used only when CONFIG_SMP is set
  x86: fix spin_is_contended()
  x86, nmi: clean UP NMI watchdog failure message
  x86, NMI: fix watchdog failure message
  x86: fix /proc/meminfo DirectMap
  x86: fix readb() et al compile error with gcc-3.2.3
  arch/x86/Kconfig: clean up, experimental adjustement
  x86: invalidate caches before going into suspend
  x86, perfctr: don't use CCCR_OVF_PMI1 on Pentium 4Ds
  x86, AMD IOMMU: initialize dma_ops after sysfs registration
  x86m AMD IOMMU: cleanup: replace LOW_U32 macro with generic lower_32_bits
  x86, AMD IOMMU: initialize device table properly
  x86, AMD IOMMU: use status bit instead of memory write-back for completion wait
  x86: silence mmconfig printk
  x86, msr: fix NULL pointer deref due to msr_open on nonexistent CPUs
  ...

11 years agoMove sysctl check into debugging section and don't make it default y
Andi Kleen [Sat, 16 Aug 2008 05:53:05 +0000]
Move sysctl check into debugging section and don't make it default y

I noticed that sysctl_check.o was the largest object file in
a allnoconfig build in kernel/*.

  36243       0       0   36243    8d93 kernel/sysctl_check.o

This is because it was default y and && EMBEDDED. But I don't
really see a need for a non kernel developer to have their
sysctls checked all the time.

So move the Kconfig into the kernel debugging section and
also drop the default y and the EMBEDDED check.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoMerge master.kernel.org:/home/rmk/linux-2.6-arm
Linus Torvalds [Sat, 16 Aug 2008 23:48:45 +0000]
Merge master.kernel.org:/home/rmk/linux-2.6-arm

* master.kernel.org:/home/rmk/linux-2.6-arm: (38 commits)
  [ARM] 5191/1: ARM: remove CVS keywords
  [ARM] pxafb: fix the warning of incorrect lccr when lcd_conn is specified
  [ARM] pxafb: add flag to specify output format on LDD pins when base is RGBT16
  [ARM] pxafb: fix the incorrect configuration of GPIO77 as ACBIAS for TFT LCD
  [ARM] 5198/1: PalmTX: PCMCIA fixes
  [ARM] Fix a pile of broken watchdog drivers
  [ARM] update mach-types
  [ARM] 5196/1: fix inline asm constraints for preload
  [ARM] 5194/1: update .gitignore
  [ARM] add proc-macros.S include to proc-arm940 and proc-arm946
  [ARM] 5192/1: ARM TLB: add v7wbi_{possible,always}_flags to {possible,always}_tlb_flags
  [ARM] 5193/1: Wire up missing syscalls
  [ARM] traps: don't call undef hook functions with spinlock held
  [ARM] 5183/2: Provide Poodle LoCoMo GPIO names
  [ARM] dma-mapping: provide sync_range APIs
  [ARM] dma-mapping: improve type-safeness of DMA translations
  [ARM] Kirkwood: instantiate the orion_spi driver in the platform code
  [ARM] prevent crashing when too much RAM installed
  [ARM] Kirkwood: Instantiate mv_xor driver
  [ARM] Orion: Instantiate mv_xor driver for 5182
  ...

11 years agoFix header export of videodev2.h, ivtv.h, ivtvfb.h
David Woodhouse [Sat, 16 Aug 2008 10:55:04 +0000]
Fix header export of videodev2.h, ivtv.h, ivtvfb.h

The exported copy of videodev2.h contains this line:

#define #include <sys/time.h>

This is because for some reason it defines __user for itself -- despite
the fact that we remove all instances of __user when exporting headers.
_All_ pointers in userspace are user pointers. Fix it by removing the
unnecessary '#define __user' from the file.

The new headers ivtv.h and ivtvfb.h would have the same problem... if
whoever put them there had actually remembered to add them to the Kbuild
file while he was at it. Fix those too, and export them as was
presumably intended.

Note that includes of <linux/compiler.h> are also stripped by the header
export process, so those don't need to be conditional.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agomm: VM_flags comment fixes
Hugh Dickins [Sat, 16 Aug 2008 10:07:21 +0000]
mm: VM_flags comment fixes

Try to comment away a little of the confusion between mm's vm_area_struct
vm_flags and vmalloc's vm_struct flags: based on an idea by Ulrich Drepper.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years ago[ARM] 5191/1: ARM: remove CVS keywords
Adrian Bunk [Sun, 10 Aug 2008 14:25:55 +0000]
[ARM] 5191/1: ARM: remove CVS keywords

This patch removes CVS keywords that weren't updated for a long time.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

11 years ago[ARM] pxafb: fix the warning of incorrect lccr when lcd_conn is specified
Eric Miao [Sat, 16 Aug 2008 07:50:51 +0000]
[ARM] pxafb: fix the warning of incorrect lccr when lcd_conn is specified

The newly introduced "lcd_conn" field for connected LCD panel type will
cause the original code to generate the warnings of incorrect lccr*.
This is unnecessary since well encoded LCD_* flags will not generate
incorrect combinition of lccr* bits. Skip the check if "lcd_conn" is
specified.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

11 years ago[ARM] pxafb: add flag to specify output format on LDD pins when base is RGBT16
Eric Miao [Fri, 15 Aug 2008 06:50:44 +0000]
[ARM] pxafb: add flag to specify output format on LDD pins when base is RGBT16

Another fix of inconsistent shift of the LCD_BIAS_ACTIVE_* and
LCD_PCLK_EDGE_* is also included.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

11 years ago[ARM] pxafb: fix the incorrect configuration of GPIO77 as ACBIAS for TFT LCD
Eric Miao [Sat, 16 Aug 2008 07:59:11 +0000]
[ARM] pxafb: fix the incorrect configuration of GPIO77 as ACBIAS for TFT LCD

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Tested-by: Alex Osborne <ato@meshy.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

11 years ago[ARM] 5198/1: PalmTX: PCMCIA fixes
Marek Vašut [Sat, 16 Aug 2008 14:34:11 +0000]
[ARM] 5198/1: PalmTX: PCMCIA fixes

Fix GPIO handling in the PCMCIA driver.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

11 years ago[ARM] Fix a pile of broken watchdog drivers
Adrian Bunk [Sun, 10 Aug 2008 11:33:08 +0000]
[ARM] Fix a pile of broken watchdog drivers

These patches from Adrian fix:
- ixp4xx_wdt: 20d35f3e50ea7e573f9568b9fce4e98523aaee5d
CC drivers/watchdog/ixp4xx_wdt.o
ixp4xx_wdt.c:32: error: expected '=', ',', ';', 'asm' or '__attribute__'
ixp4xx_wdt.c: In function 'wdt_enable':
ixp4xx_wdt.c:41: error: 'wdt_lock' undeclared (first use in this
ixp4xx_wdt.c:41: error: (Each undeclared identifier is reported only
ixp4xx_wdt.c:41: error: for each function it appears in.)
ixp4xx_wdt.c: In function 'wdt_disable':
ixp4xx_wdt.c:52: error: 'wdt_lock' undeclared (first use in this
ixp4xx_wdt.c: In function 'ixp4xx_wdt_init':
ixp4xx_wdt.c:186: error: 'wdt_lock' undeclared (first use in this
make[3]: *** [drivers/watchdog/ixp4xx_wdt.o] Error 1

- at91rm9200_wdt: 2760600da2a13d5a2a335ba012d0f3ad5df4c098
CC drivers/watchdog/at91rm9200_wdt.o
at91rm9200_wdt.c:188: error: 'at91_wdt_ioctl' undeclared here (not in a
make[3]: *** [drivers/watchdog/at91rm9200_wdt.o] Error 1

- wdt285: d0e58eed05f9baf77c4f75e794ae245f6dae240a
CC [M] drivers/watchdog/wdt285.o
wdt285.c: In function 'footbridge_watchdog_init':
wdt285.c:211: error: 'KERN_WARN' undeclared (first use in this function)
wdt285.c:211: error: (Each undeclared identifier is reported only once
wdt285.c:211: error: for each function it appears in.)
wdt285.c:212: error: expected ')' before string constant
make[3]: *** [drivers/watchdog/wdt285.o] Error 1

And this patch from rmk:
- s3c2410_wdt: 41dc8b72e37c514f7332cbc3f3dd864910c2a1fa
CC drivers/watchdog/s3c2410_wdt.o
s3c2410_wdt.c: In function `s3c2410wdt_start':
s3c2410_wdt.c:161: warning: `return' with a value, in function returning void

Reported-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

11 years ago[ARM] update mach-types
Russell King [Wed, 13 Aug 2008 20:56:24 +0000]
[ARM] update mach-types

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

11 years ago[ARM] 5196/1: fix inline asm constraints for preload
Nicolas Pitre [Tue, 12 Aug 2008 21:10:59 +0000]
[ARM] 5196/1: fix inline asm constraints for preload

With gcc 4.3 and later, a pointer that has already been dereferenced is
assumed not to be null since it should have caused a segmentation fault
otherwise, hence any subsequent test against NULL is optimized away.

Current inline asm constraint used in the implementation of prefetch()
makes gcc believe that the pointer is dereferenced even though the PLD
instruction does not load any data and does not cause a segmentation
fault on null pointers, which causes all sorts of interesting results
when reaching the end of a linked lists for example.

Let's use a better constraint to properly represent the actual usage of
the pointer value.

Problem reported by Chris Steel.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Fri, 15 Aug 2008 22:32:13 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/security-testing-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  security: Fix setting of PF_SUPERPRIV by __capable()

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney...
Linus Torvalds [Fri, 15 Aug 2008 22:31:23 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/cooloney/blackfin-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: (33 commits)
  Blackfin arch: hook up some missing new system calls
  Blackfin arch: fix missing digit in SCLK range checking
  Blackfin arch: do not muck with the UART during boot -- let the serial driver worry about it
  Blackfin arch: clear EMAC_SYSTAT during IRQ init rather than early head.S as we dont need it setup that early
  Blackfin arch: use %pF when printing out the double fault address so we get symbol names
  Blackfin arch: add support for the BlackStamp board
  Blackfin arch: Allow ins functions to have a low latency version
  Blackfin arch: Print out doublefault addresses, so debug can occur
  Blackfin arch: shuffle related prototypes together -- no functional changes
  Blackfin arch: move fixed code defines into fixed_code.h as very few things actually need to know these details
  Blackfin arch: mark some functions as __init as they are only called from __init functions
  Blackfin arch: delete dead prototypes
  Blackfin arch: cleanup cache lock code
  Blackfin arch: workaround SIC_IWR1 reset bug, by keeping MDMA0/1 always enabled in SIC_IWR1.
  Blackfin arch: Fix bug - when expanding the trace buffer, it does not print out the decoded instruction.
  Blackfin arch: Fix Bug - System with EMAC driver enabled - Core not idling
  Blackfin arch: delete unused cache functions
  Blackfin arch: convert L2 defines to be the same as the L1 defines
  Blackfin arch: unify the duplicated portions of __start and split mach-specific pieces into _mach_early_start where they will be easier to trim over time
  Blackfin arch: add asm/thread_info.h for THREAD_SIZE define
  ...

11 years agoMerge branch 'release-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/ak...
Linus Torvalds [Fri, 15 Aug 2008 19:47:16 +0000]
Merge branch 'release-2.6.27' of git://git./linux/kernel/git/ak/linux-acpi-2.6

* 'release-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-acpi-2.6:
  cpuidle: Make ladder governor honor latency requirements fully
  cpuidle: Menu governor fix wrong usage of measured_us
  cpuidle: Do not use poll_idle unless user asks for it
  x86: Fix ioremap off by one BUG

11 years agoMerge branch 'cpuidle' into release-2.6.27
Andi Kleen [Fri, 15 Aug 2008 19:26:12 +0000]
Merge branch 'cpuidle' into release-2.6.27

11 years agocpuidle: Make ladder governor honor latency requirements fully
venkatesh.pallipadi@intel.com [Thu, 31 Jul 2008 02:21:44 +0000]
cpuidle: Make ladder governor honor latency requirements fully

ladder governor only honored latency requirement when promoting C-states.
Instead. it should check for latency requirement on each idle call,
and demote to appropriate C-state when there is a latency requirement change.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

11 years agocpuidle: Menu governor fix wrong usage of measured_us
venkatesh.pallipadi@intel.com [Thu, 31 Jul 2008 02:21:43 +0000]
cpuidle: Menu governor fix wrong usage of measured_us

There is a bug in menu governor where we have
if (data->elapsed_us < data->elapsed_us + measured_us)

with measured_us already having elapsed_us added in tickless case here
unsigned int measured_us =
cpuidle_get_last_residency(dev) + data->elapsed_us;

Also, it should be last_residency, not measured_us, that need to be used to
do comparing and distinguish between expected & non-expected events.

Refactor menu_reflect() to fix these two problems.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Wei Gang <gang.wei@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

11 years agocpuidle: Do not use poll_idle unless user asks for it
venkatesh.pallipadi@intel.com [Thu, 31 Jul 2008 02:21:42 +0000]
cpuidle: Do not use poll_idle unless user asks for it

poll_idle was added to CPUIDLE, just as a low latency idle handler, to be
used in cases when user desires CPUs not to enter any idle state at all. It
was supposed to be a run time idle=poll option to the user. But, it was indeed
getting used during normal menu and ladder governor default case, with no
special user setting (Reported by Linus Torvalds).

Change below ensures that poll_idle will not be used unless user explicitly
asks pm_qos infrastructure for zero latency requirement.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
Linus Torvalds [Fri, 15 Aug 2008 18:52:40 +0000]
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:
  ALSA: wm8990: Implement speaker volume PGA
  ALSA: wm8990: Fix routing of left DAC to speaker mixer
  ALSA: virtuoso: add Xonar D1 support

11 years agohwmon-vid: Fix AMD K8 VID decoding
Jean Delvare [Fri, 15 Aug 2008 08:58:05 +0000]
hwmon-vid: Fix AMD K8 VID decoding

Not all AMD K8 have 6 VID pins, contrary to what was assumed in
commit 116d0486bdefc11f71e567cadf0c47f788b4dd06. This commit broke
support of older CPU models which have only 5 VID pins:
http://bugzilla.kernel.org/show_bug.cgi?id=11329

We need two entries in the hwmon-vid table, one for 5-bit VID models
(K8 revision <= E) and one for 6-bit VID models (K8 revision >= F).
This fixes bug #11329.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Frank Myhr <fmyhr@fhmtech.com>
Tested-by: Jean-Luc Coulon <jean.luc.coulon@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agox86: add MAP_STACK mmap flag
Ingo Molnar [Wed, 13 Aug 2008 16:02:18 +0000]
x86: add MAP_STACK mmap flag

as per this discussion:

   http://lkml.org/lkml/2008/8/12/423

Pardo reported that 64-bit threaded apps, if their stacks exceed the
combined size of ~4GB, slow down drastically in pthread_create() - because
glibc uses MAP_32BIT to allocate the stacks. The use of MAP_32BIT is
a legacy hack - to speed up context switching on certain early model
64-bit P4 CPUs.

So introduce a new flag to be used by glibc instead, to not constrain
64-bit apps like this.

glibc can switch to this new flag straight away - it will be ignored
by the kernel. If those old CPUs ever matter to anyone, support for
it can be implemented.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Ulrich Drepper <drepper@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
Linus Torvalds [Fri, 15 Aug 2008 18:02:35 +0000]
Merge git://git./linux/kernel/git/sfrench/cifs-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  [CIFS] mount of IPC$ breaks with iget patch
  [CIFS] remove trailing whitespace
  [CIFS] if get root inode fails during mount, cleanup tree connection

11 years agoMerge branch 'ioremap' into release-2.6.27
Andi Kleen [Fri, 15 Aug 2008 17:38:47 +0000]
Merge branch 'ioremap' into release-2.6.27

11 years agotty: remove resize window special case
Alan Cox [Fri, 15 Aug 2008 09:39:38 +0000]
tty: remove resize window special case

This moves it to being a tty operation. That removes special cases and now
also means that resize can be picked up by um and other non vt consoles
which may have a resize operation.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoMerge branch 'linux-next' of git://git.infradead.org/~dedekind/ubifs-2.6
Linus Torvalds [Fri, 15 Aug 2008 17:33:07 +0000]
Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubifs-2.6

* 'linux-next' of git://git.infradead.org/~dedekind/ubifs-2.6: (29 commits)
  UBIFS: xattr bugfixes
  UBIFS: remove unneeded check
  UBIFS: few commentary fixes
  UBIFS: fix budgeting request alignment in xattr code
  UBIFS: improve arguments checking in debugging messages
  UBIFS: always set i_generation to 0
  UBIFS: correct spelling of "thrice".
  UBIFS: support splice_write
  UBIFS: minor tweaks in commit
  UBIFS: reserve more space for index
  UBIFS: print pid in dump function
  UBIFS: align inode data to eight
  UBIFS: improve budgeting checks
  UBIFS: correct orphan deletion order
  UBIFS: fix typos in comments
  UBIFS: do not union creat_sqnum and del_cmtno
  UBIFS: optimize deletions
  UBIFS: increment commit number earlier
  UBIFS: remove another unneeded function parameter
  UBIFS: remove unneeded function parameter
  ...

11 years agolockdep: fix build if CONFIG_PROVE_LOCKING not defined
Stephen Hemminger [Fri, 15 Aug 2008 16:33:05 +0000]
lockdep: fix build if CONFIG_PROVE_LOCKING not defined

If CONFIG_PROVE_LOCKING not defined, then no dependency information
is available.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86: add MAP_STACK mmap flag
Ingo Molnar [Wed, 13 Aug 2008 16:02:18 +0000]
x86: add MAP_STACK mmap flag

as per this discussion:

   http://lkml.org/lkml/2008/8/12/423

Pardo reported that 64-bit threaded apps, if their stacks exceed the
combined size of ~4GB, slow down drastically in pthread_create() - because
glibc uses MAP_32BIT to allocate the stacks. The use of MAP_32BIT is
a legacy hack - to speed up context switching on certain early model
64-bit P4 CPUs.

So introduce a new flag to be used by glibc instead, to not constrain
64-bit apps like this.

glibc can switch to this new flag straight away - it will be ignored
by the kernel. If those old CPUs ever matter to anyone, support for
it can be implemented.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Ulrich Drepper <drepper@gmail.com>

11 years agox86: fix section mismatch warning - spp_getpage()
Marcin Slusarz [Fri, 15 Aug 2008 16:32:24 +0000]
x86: fix section mismatch warning - spp_getpage()

WARNING: vmlinux.o(.text+0x17a3e): Section mismatch in reference from the function set_pte_vaddr_pud() to the function .init.text:spp_getpage()
The function set_pte_vaddr_pud() references
the function __init spp_getpage().
This is often because set_pte_vaddr_pud lacks a __init
annotation or the annotation of spp_getpage is wrong.

spp_getpage is called from __init (__init_extra_mapping) and
non __init (set_pte_vaddr_pud) functions, so it can't be __init.
Unfortunately it calls alloc_bootmem_pages which is __init,
but does it only when bootmem allocator is available (after_bootmem == 0).

So annotate it accordingly.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@zytor.com>

11 years agox86: change init_gdt to update the gdt via write_gdt, rather than a direct write.
Alex Nixon [Fri, 15 Aug 2008 16:21:14 +0000]
x86: change init_gdt to update the gdt via write_gdt, rather than a direct write.

By writing directly, a memory access violation can occur whilst
hotplugging a CPU if the entry was previously marked read-only.

Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
Cc: Jeremy Fitzhardinge <Jeremy.Fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Fri, 15 Aug 2008 16:30:24 +0000]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md: cancel check/repair requests when recovery is needed
  Allow raid10 resync to happening in larger chunks.
  Allow faulty devices to be removed from a readonly array.
  Don't let a blocked_rdev interfere with read request in raid5/6
  Fail safely when trying to grow an array with a write-intent bitmap.
  Restore force switch of md array to readonly at reboot time.
  Make writes to md/safe_mode_delay immediately effective.

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Fri, 15 Aug 2008 16:28:16 +0000]
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: xilinx_ps2 - fix warning
  Input: bcm5974 - implement autosuspend support
  Input: bcm5974 - add driver for Macbook Air and Pro Penryn touchpads
  Input: paper over a bug in Synaptics X driver
  Input: evdev - split EVIOCGBIT handlig into a separate function
  Input: i8042 - Add Dritek quirk for Acer TravelMate 4280
  Input: xpad - add Pelican Eclipse D-Pad to the list of devices
  Input: gpio-keys - make gpio_keys_device_driver static
  Input: gpio-keys - fix possible NULL pointer dereference
  Input: wm97xx - enable sub-drivers by default

11 years agoMerge branch 'release-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/ak...
Linus Torvalds [Fri, 15 Aug 2008 16:26:37 +0000]
Merge branch 'release-2.6.27' of git://git./linux/kernel/git/ak/linux-acpi-2.6

* 'release-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-acpi-2.6:
  ACPI: Fix thermal shutdowns
  ACPI: bounds check IRQ to prevent memory corruption
  ACPI: Avoid bogus EC timeout when EC is in Polling mode
  ACPI : Add the EC dmi table to fix the incorrect ECDT table
  ACPI: Properly clear flags on false-positives and send uevent on sudden unplug
  acpi: trivial cleanups
  acer-wmi: Fix wireless and bluetooth on early AMW0 v2 laptops
  ACPI: WMI: Set instance for query block calls
  ACPICA: Additional error checking for pathname utilities
  ACPICA: Fix possible memory leak in Unload() operator
  ACPICA: Fix memory leak when deleting thermal/processor objects

11 years agosched: scale sysctl_sched_shares_ratelimit with nr_cpus
Peter Zijlstra [Mon, 4 Aug 2008 06:54:26 +0000]
sched: scale sysctl_sched_shares_ratelimit with nr_cpus

David reported that his Niagra spend a little too much time in
tg_shares_up(), which considering he has a large cpu count makes sense.

So scale the ratelimit value with the number of cpus like we do for
other controls as well.

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agoalpha: move include/asm-alpha to arch/alpha/include/asm
Linus Torvalds [Fri, 15 Aug 2008 16:19:40 +0000]
alpha: move include/asm-alpha to arch/alpha/include/asm

Sam Ravnborg did the build-test that the direct header file move works,
I'm just committing it.

This is a pure move:

mkdir arch/alpha/include
git mv include/asm-alpha arch/alpha/include/asm

with no other changes.

Requested-and-tested-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agox86: Fix ioremap off by one BUG
Andi Kleen [Fri, 15 Aug 2008 16:12:47 +0000]
x86: Fix ioremap off by one BUG

Jean Delvare's machine triggered this BUG

acpi_os_map_memory phys ffff0000 size 65535
------------[ cut here ]------------
kernel BUG at arch/x86/mm/pat.c:233!

with ACPI in the backtrace.

Adding some debugging output showed that ACPI calls

acpi_os_map_memory phys ffff0000 size 65535

And ioremap/PAT does this check in 32bit, so addr+size wraps and the BUG
in reserve_memtype() triggers incorrectly.

        BUG_ON(start >= end); /* end is exclusive */

But reserve_memtype already uses u64:

int reserve_memtype(u64 start, u64 end,

so the 32bit truncation must happen in the caller. Presumably in ioremap
when it passes this information to reserve_memtype().

This patch does this computation in 64bit.

http://bugzilla.kernel.org/show_bug.cgi?id=11346

Signed-off-by: Andi Kleen <ak@linux.intel.com>

11 years agoMerge branch 'x86/geode' into x86/urgent
Ingo Molnar [Fri, 15 Aug 2008 15:53:07 +0000]
Merge branch 'x86/geode' into x86/urgent

11 years agoALSA: wm8990: Implement speaker volume PGA
Mark Brown [Fri, 15 Aug 2008 15:22:33 +0000]
ALSA: wm8990: Implement speaker volume PGA

The latest revisions of the WM8990 provide a programmable gain amplifier
for the speaker - configure the register cache and implement controls
for this. Older revisions of the device ignore writes to these controls.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

11 years agoALSA: wm8990: Fix routing of left DAC to speaker mixer
Mark Brown [Fri, 15 Aug 2008 15:22:32 +0000]
ALSA: wm8990: Fix routing of left DAC to speaker mixer

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

11 years agoomfs: fix oops when file metadata is corrupted
Bob Copeland [Fri, 15 Aug 2008 07:40:47 +0000]
omfs: fix oops when file metadata is corrupted

A fuzzed fileystem image failed with OMFS when the extent count was
used in a loop without being checked against the max number of extents.
It also provoked a signed division for an array index that was checked
as if unsigned, leading to index by -1.

omfsck will be updated to fix these cases, in the meantime bail out
gracefully.

Reported-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoomfs: fix potential oops when directory size is corrupted
Bob Copeland [Fri, 15 Aug 2008 07:40:46 +0000]
omfs: fix potential oops when directory size is corrupted

Testing with a modified fsfuzzer reveals a couple of locations in omfs
where filesystem variables are ultimately used as loop counters with
insufficient sanity checking.  In this case, dir->i_size is used to
compute the number of buckets in the directory hash.  If too large,
readdir will overrun a buffer.

Since it's an invariant that dir->i_size is equal to the sysblock
size, and we already sanity check that, just use that value instead.
This fixes the following oops:

BUG: unable to handle kernel paging request at c978e004
IP: [<c032298e>] omfs_readdir+0x18e/0x32f
Oops: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
Modules linked in:

Pid: 4796, comm: ls Not tainted (2.6.27-rc2 #12)
EIP: 0060:[<c032298e>] EFLAGS: 00010287 CPU: 0
EIP is at omfs_readdir+0x18e/0x32f
EAX: c978d000 EBX: 00000000 ECX: cbfcfaf8 EDX: cb2cf100
ESI: 00001000 EDI: 00000800 EBP: cb2d3f68 ESP: cb2d3f0c
 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Process ls (pid: 4796, ti=cb2d3000 task=cb175f40 task.ti=cb2d3000)
Stack: 00000002 00000000 00000000 c018a820 cb2d3f94 cb2cf100 cbfb0000 ffffff10
       cbfb3b80 cbfcfaf8 000001c9 00000a09 00000000 00000000 00000000 cbfcfbc8
       c9697000 cbfb3b80 22222222 00001000 c08e6cd0 cb2cf100 cbfb3b80 cb2d3f88
Call Trace:
 [<c018a820>] ? filldir64+0x0/0xcd
 [<c018a9f2>] ? vfs_readdir+0x56/0x82
 [<c018a820>] ? filldir64+0x0/0xcd
 [<c018aa7c>] ? sys_getdents64+0x5e/0xa0
 [<c01038bd>] ? sysenter_do_call+0x12/0x31
 =======================
Code: 00 89 f0 89 f3 0f ac f8 14 81 e3 ff ff 0f 00 48 8d
14 c5 b8 01 00 00 89 45 cc 89 55 f0 e9 8c 01 00 00 8b 4d c8 8b 75 f0 8b
41 18 <8b> 54 30 04 8b 04 30 31 f6 89 5d dc 89 d1 8b 55 b8 0f c8 0f c9

Reported-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agocompletions: uninline try_wait_for_completion and completion_done
Dave Chinner [Fri, 15 Aug 2008 07:40:44 +0000]
completions: uninline try_wait_for_completion and completion_done

m68k fails to build with these functions inlined in completion.h.  Move
them out of line into sched.c and export them to avoid this problem.

Signed-off-by: Dave Chinner <david@fromorbit.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agospi: bugfix spi_add_device() with duplicate chipselects
David Brownell [Fri, 15 Aug 2008 07:40:44 +0000]
spi: bugfix spi_add_device() with duplicate chipselects

When reviewing a recent patch I noticed a potential trouble spot in the
registration of new SPI devices.  The SPI master driver is told to set
the device up before adding it to the driver model, so that it's always
properly set up when probe() is called.  (This is important, because in
the case of inverted chipselects, this device can make the bus misbehave
until it's properly deselected.  It's got to be set up even if no driver
binds to the device.)

The trouble spot is that it doesn't first verify that no other device
has been added using that chipselect.  If such a device has been added,
its configuration gets trashed.  (Fortunately this has not been a common
error!)

The fix here adds an explicit check, and a mutex to protect the relevant
critical region.

[akpm@linux-foundation.org: make the lock local to spi_add_device()]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agofs/inode.c: properly init address_space->writeback_index
Chris Mason [Fri, 15 Aug 2008 07:40:43 +0000]
fs/inode.c: properly init address_space->writeback_index

write_cache_pages() uses i_mapping->writeback_index to pick up where it
left off the last time a given inode was found by pdflush or
balance_dirty_pages (or anyone else who sets wbc->range_cyclic)

alloc_inode() should set it to a sane value so that writeback doesn't
start in the middle of a file.  It is somewhat difficult to notice the bug
since write_cache_pages will loop around to the start of the file and the
elevator helps hide the resulting seeks.

For whatever reason, Btrfs hits this often.  Unpatched, untarring 30
copies of the linux kernel in series runs at 47MB/s on a single sata
drive.  With this fix, it jumps to 62MB/s.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoMAINTAINERS: add maintainers for GRU, XPC, XPNET and XP
Jack Steiner [Fri, 15 Aug 2008 07:40:42 +0000]
MAINTAINERS: add maintainers for GRU, XPC, XPNET and XP

Add MAINTAINERS for GRU, XPNET, XPC and XP drivers.

Signed-off-by: Jack Steiner <steiner@sgi.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>

11 years agocoretemp: recognize Nehalem CPUs
Darrick J. Wong [Fri, 15 Aug 2008 07:40:41 +0000]
coretemp: recognize Nehalem CPUs

Add in the CPUID for Nehalem chips.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Cc: Kent Liu <kent.liu@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoibmaem: don't query the entire sensor repository when reading energy meter
Darrick J. Wong [Fri, 15 Aug 2008 07:40:41 +0000]
ibmaem: don't query the entire sensor repository when reading energy meter

Currently, all sensors are read when the energy meter is queried via
sysfs.  This introduces a considerable amount of delay and variation in
the sysfs reading, which is not desirable when trying to profile energy
use.  Therefore, read only the energy meters when a sysfs query comes in
for them, and don't cache the results so that we always get the latest
reading.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoibmaem: prevent infinite probing loop on x3650 M2 systems
Darrick J. Wong [Fri, 15 Aug 2008 07:40:40 +0000]
ibmaem: prevent infinite probing loop on x3650 M2 systems

On older machines, probing for a nonexistent AEM interface returned an
IPMI error; when we saw this, we'd stop probing.  On the x3650 M2 and
(presumably) later, we are returned a value indicating success and a
buffer full of garbage or zeroes.  This causes the probe function to run
in an infinite loop.  To fix this, we add one last check--if the
interface number we're looking for is higher than the number of
interfaces that AEM claims to have, stop probing.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoibmaem: update the documentation to reflect the current name
Darrick J. Wong [Fri, 15 Aug 2008 07:40:40 +0000]
ibmaem: update the documentation to reflect the current name

Minor documentation update to reflect the current full name of the power
management hardware interface and reflows the text a bit.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoabituguru3: prefer DMI probing to manual probing
Alistair John Strachan [Fri, 15 Aug 2008 07:40:39 +0000]
abituguru3: prefer DMI probing to manual probing

Previously the driver was only using DMI to prevent smbus probing on
non-Abit motherboards.  However, since the manual probing method is
brittle and prone to failure on some Abit motherboards (esp.  the Abit
IP35 Pro) it is better to use DMI to also read the board name and then
decide whether or not to probe the bus.

At the moment, we do not have a list of valid DMI name strings to use
for existing and supported motherboards.  This patch only implements DMI
probing for the IP35 Pro.  For motherboards that can not yet use DMI
probing, a warning will be printed to the kernel log asking those users
to email me their dmidecode output.

The existing manual probing mechanism will be used if CONFIG_DMI is not
enabled, if DMI probing fails (for DMI-unsupported motherboards), or if
DMI probing fails and the "force" option is set (for DMI-supported
motherboards).  Ideally in the longer term this manual probing method
would be removed.

This patch should be safe to apply as it does not change the probing
behaviour for most of the supported motherboards, just the IP35 Pro,
which already has regressions filed against it in 2.6.26.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=11212

Signed-off-by: Alistair John Strachan <alistair@devzero.co.uk>
Acked-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoabituguru3: update MAINTAINERS
Alistair John Strachan [Fri, 15 Aug 2008 07:40:37 +0000]
abituguru3: update MAINTAINERS

Hans passed maintainership of the abituguru3 hwmon driver onto me.  Add
a new entry to the MAINTAINERS file for the abituguru3 driver and assign
it to me.  Also update the existing UGURU entry to indicate that Hans is
only responsible for the abituguru driver.

Signed-off-by: Alistair John Strachan <alistair@devzero.co.uk>
Acked-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoi5k_amb: provide labels for temperature sensors
Darrick J. Wong [Fri, 15 Aug 2008 07:40:36 +0000]
i5k_amb: provide labels for temperature sensors

Export the sensor -> channel/dimm mapping in tempX_label.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agohwmon: ADC124S501 generic driver
Marc Pignat [Fri, 15 Aug 2008 07:40:34 +0000]
hwmon: ADC124S501 generic driver

SPI driver for analog to digital converters national semiconductor
ADC081S101, ADC124S501, ...

Code for 8 channels by Tobias Himmer.

This driver adds support for National Semiconductor ADC<bb><c>S<sss> chip
family, where:

 * bb  is the resolution in number of bits (8, 10, 12)
 * c   is the number of channels (1, 2, 4, 8)
 * sss is the maximum conversion speed (021 for 200 kSPS, 051 for 500
   kSPS and 101 for 1 MSPS)

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Marc Pignat <marc.pignat@hevs.ch>
Cc: Tobias Himmer <tobias@himmer-online.de>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agodrivers/hwmon/w83791d.c: fix unused var warning
Michael Borisov [Fri, 15 Aug 2008 07:40:32 +0000]
drivers/hwmon/w83791d.c: fix unused var warning

drivers/hwmon/w83791d.c: In function `w83791d_probe':
drivers/hwmon/w83791d.c:1049: warning: unused variable `val1'

Signed-off-by: Michael Borisov <niro@tut.by>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoapplesmc: add support for Macbook
Guilherme M. Schroeder [Fri, 15 Aug 2008 07:40:32 +0000]
applesmc: add support for Macbook

Add support for Macbook v3 (sensors and accelerometer).

Signed-off-by: Nicolas Boichat <nicolas@boichat.ch>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoapplesmc: support for Intel iMac
Roberto De Ioris [Fri, 15 Aug 2008 07:40:30 +0000]
applesmc: support for Intel iMac

This adds support for fans and temperature sensors on intel iMac.

Tested on iMac 24" 2.8ghz (iMac8,1), it supports the following sensors:

cpu A
ambient
gpu
gpu diode
gpu heatsink
hd bay 1
memory controller
optical drive
power

Signed-off-by: Roberto De Ioris <roberto@unbit.it>
Cc: Nicolas Boichat <nicolas@boichat.ch>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agofreescale DIU: bug fix: add sanity check for AOI position
York Sun [Fri, 15 Aug 2008 07:40:29 +0000]
freescale DIU: bug fix: add sanity check for AOI position

AOI position cannot be negative.

Signed-off-by: York Sun <yorksun@freescale.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agofreescale DIU: add virtual resolution and panning support
York Sun [Fri, 15 Aug 2008 07:40:28 +0000]
freescale DIU: add virtual resolution and panning support

Application can now have the virtual resoltuion and use FBIOPAN_DISPLAY
ioctl to pan.

Signed-off-by: York Sun <yorksun@freescale.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agokexec: use a mutex for locking rather than xchg()
Andrew Morton [Fri, 15 Aug 2008 07:40:27 +0000]
kexec: use a mutex for locking rather than xchg()

Functionally the same, but more conventional.

Cc: Huang Ying <ying.huang@intel.com>
Tested-by: Vivek Goyal <vgoyal@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agokexec jump: fix for ftrace
Huang Ying [Fri, 15 Aug 2008 07:40:26 +0000]
kexec jump: fix for ftrace

Ftrace depends on some processor state that we destroyed during kexec and
restored by restore_processor_state().  So save_processor_state() and
restore_processor_state() are moved into machine_kexec() and ftrace is
restored after restore_processor_state().

Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agokexec jump: __ftrace_enabled_save/restore
Huang Ying [Fri, 15 Aug 2008 07:40:25 +0000]
kexec jump: __ftrace_enabled_save/restore

Add __ftrace_enabled_save/restore, used to disable ftrace for a while.
Now, this is used by kexec jump, which need a version without lock, for
general situation, a locked version should be used.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agokexec jump: in sync with hibernation implementation
Huang Ying [Fri, 15 Aug 2008 07:40:24 +0000]
kexec jump: in sync with hibernation implementation

Add device_pm_lock() and device_pm_unlock() in kernel_kexec() in sync with
current hibernation implementation.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agokexec jump: remove duplication of kexec_restart_prepare()
Huang Ying [Fri, 15 Aug 2008 07:40:24 +0000]
kexec jump: remove duplication of kexec_restart_prepare()

Call kernel_restart_prepare() in kernel_kexec() instead of duplicating the
code.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Acked-by: Pavel Machek <pavel@suse.cz>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agokexec jump: check code size in control page
Huang Ying [Fri, 15 Aug 2008 07:40:23 +0000]
kexec jump: check code size in control page

Kexec/Kexec-jump require code size in control page is less than
PAGE_SIZE/2.  This patch add link-time checking for this.

ASSERT() of ld link script is used as the link-time checking mechanism.

[akpm@linux-foundation.org: build fix]
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agokexec jump: rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE
Huang Ying [Fri, 15 Aug 2008 07:40:22 +0000]
kexec jump: rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE

Rename KEXEC_CONTROL_CODE_SIZE to KEXEC_CONTROL_PAGE_SIZE, because control
page is used for not only code on some platform.  For example in kexec
jump, it is used for data and stack too.

[akpm@linux-foundation.org: unbreak powerpc and arm, finish conversion]
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agokexec jump: clean up #ifdef and comments
Huang Ying [Fri, 15 Aug 2008 07:40:21 +0000]
kexec jump: clean up #ifdef and comments

Move if (kexec_image->preserve_context) { ...  } into #ifdef
CONFIG_KEXEC_JUMP to make code looks cleaner.

Fix no longer correct comments of kernel_kexec().

Signed-off-by: Huang Ying <ying.huang@intel.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agokexec: fix compilation warning on xchg(&kexec_lock, 0) in kernel_kexec()
Huang Ying [Fri, 15 Aug 2008 07:40:20 +0000]
kexec: fix compilation warning on xchg(&kexec_lock, 0) in kernel_kexec()

kernel/kexec.c: In function 'kernel_kexec':
kernel/kexec.c:1506: warning: value computed is not used

Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agosuspend: fix section mismatch warning - register_nosave_region
Marcin Slusarz [Fri, 15 Aug 2008 07:40:19 +0000]
suspend: fix section mismatch warning - register_nosave_region

WARNING: vmlinux.o(.text+0xe684): Section mismatch in reference from the function register_nosave_region() to the function .init.text:__register_nosave_region()
  The function register_nosave_region() references
  the function __init __register_nosave_region().
  This is often because register_nosave_region lacks a __init
  annotation or the annotation of __register_nosave_region is wrong.

register_nosave_region calls __init function and is called only from
__init functions

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agoDocumentation/vm/page_migration: update reference to numa_maps + fix download URI
Michael Kerrisk [Fri, 15 Aug 2008 07:40:18 +0000]
Documentation/vm/page_migration: update reference to numa_maps + fix download URI

With man-pages-3.07, the numa_maps documentation home is now proc(5), so
the reference in Documentation/vm/page_migration needs updating.
(Cliff/Lee are removing numa_maps.5 from the numactl package.) Also, the
download location for the numactl package changed a while back.  This
patch fixes both things, as well as a typo (provided-->provides).

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Cliff Wickman <cpw@sgi.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agobootmem allocator: alloc_bootmem_core(): page-align the end offset
Mikulas Patocka [Fri, 15 Aug 2008 07:40:17 +0000]
bootmem allocator: alloc_bootmem_core(): page-align the end offset

This is the minimal sequence that jams the allocator:

void *p, *q, *r;
p = alloc_bootmem(PAGE_SIZE);
q = alloc_bootmem(64);
free_bootmem(p, PAGE_SIZE);
p = alloc_bootmem(PAGE_SIZE);
r = alloc_bootmem(64);

after this sequence (assuming that the allocator was empty or page-aligned
before), pointer "q" will be equal to pointer "r".

What's hapenning inside the allocator:
p = alloc_bootmem(PAGE_SIZE);
in allocator: last_end_off == PAGE_SIZE, bitmap contains bits 10000...
q = alloc_bootmem(64);
in allocator: last_end_off == PAGE_SIZE + 64, bitmap contains 11000...
free_bootmem(p, PAGE_SIZE);
in allocator: last_end_off == PAGE_SIZE + 64, bitmap contains 01000...
p = alloc_bootmem(PAGE_SIZE);
in allocator: last_end_off == PAGE_SIZE, bitmap contains 11000...
r = alloc_bootmem(64);

and now:

it finds bit "2", as a place where to allocate (sidx)

it hits the condition

if (bdata->last_end_off && PFN_DOWN(bdata->last_end_off) + 1 == sidx))
start_off = ALIGN(bdata->last_end_off, align);

-you can see that the condition is true, so it assigns start_off =
ALIGN(bdata->last_end_off, align); (that is PAGE_SIZE) and allocates
over already allocated block.

With the patch it tries to continue at the end of previous allocation only
if the previous allocation ended in the middle of the page.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Johannes Weiner <hannes@saeurebad.de>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

11 years agox86-64: fix overlap of modules and fixmap areas
Jan Beulich [Thu, 31 Jul 2008 15:48:31 +0000]
x86-64: fix overlap of modules and fixmap areas

Plus add a build time check so this doesn't go unnoticed again.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86, geode-mfgpt: check IRQ before using MFGPT as clocksource
Jens Rottmann [Mon, 4 Aug 2008 12:40:16 +0000]
x86, geode-mfgpt: check IRQ before using MFGPT as clocksource

Adds a simple IRQ autodetection to the AMD Geode MFGPT driver, and more
importantly, adds some checks, if IRQs can actually be received on the
chosen line.  This fixes cases where MFGPT is selected as clocksource
though not producing any ticks, so the kernel simply starves during
boot.

Signed-off-by: Jens Rottmann <JRottmann@LiPPERTEmbedded.de>
Cc: Andres Salomon <dilinger@debian.org>
Cc: linux-geode@bombadil.infradead.org
Cc: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86, acpi: cleanup, temp_stack is used only when CONFIG_SMP is set
Marcin Slusarz [Sun, 3 Aug 2008 17:25:48 +0000]
x86, acpi: cleanup, temp_stack is used only when CONFIG_SMP is set

fix:

  arch/x86/kernel/acpi/sleep.c:24: warning: 'temp_stack' defined but not used

[ Sven Wegener <sven.wegener@stealer.net>: fix build bug ]

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86: fix spin_is_contended()
Jan Beulich [Mon, 4 Aug 2008 13:38:54 +0000]
x86: fix spin_is_contended()

The masked difference is what needs to be compared against 1, rather
than the difference of masked values (which can be negative).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Nick Piggin <npiggin@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86, nmi: clean UP NMI watchdog failure message
Ingo Molnar [Fri, 15 Aug 2008 13:34:32 +0000]
x86, nmi: clean UP NMI watchdog failure message

clean up the failure message - and redirect people to bugzilla
instead of lkml.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86, NMI: fix watchdog failure message
Aristeu Rozanski [Fri, 15 Aug 2008 12:36:14 +0000]
x86, NMI: fix watchdog failure message

> it just won't work at boot time - the second logic unit will be stuck:
>
> Booting processor 1/2 APIC 0x1
> Initializing CPU#1
> Calibrating delay using timer specific routine.. 5586.12 BogoMIPS (lpj=2793063)
> CPU: Trace cache: 12K uops, L1 D cache: 16K
> CPU: L2 cache: 1024K
> CPU: Physical Processor ID: 0
> CPU: Processor Core ID: 1
> CPU1: Thermal monitoring enabled (TM1)
>               Intel(R) Pentium(R) D CPU 2.80GHz stepping 04
> Brought up 2 CPUs
> testing NMI watchdog ... <4>WARNING: CPU#1: NMI appears to be stuck (0->0)!

while at it... - fix that newline

Signed-off-by: Aristeu Rozanski <aris@redhat.com>
Cc: jvillalo@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86: fix /proc/meminfo DirectMap
Hugh Dickins [Fri, 15 Aug 2008 12:58:32 +0000]
x86: fix /proc/meminfo DirectMap

Do we actually want these DirectMap lines in the x86 /proc/meminfo?
I can see they're interesting to CPA developers and TLB optimizers,
but they don't fit its usual "where has all my memory gone?" usage.
If they are to stay, here are some fixes.

1. On x86_32 without PAE, they're not 2M but 4M pages: no need to
   mess with the internal enum, but show the right name to users.

2. Many machines can never show anything but 0 for DirectMap1G,
   so suppress that line unless direct_gbpages are really enabled.

3. The unit in /proc/meminfo is kB not number of pages: HugePages
   messed that up, but they're an example to regret not to follow.

4. Once we use kB, it's easy to see that 1GB has gone missing (which
   explains why CONFIG_CPA_DEBUG=y soon wraps DirectMap2M negative):
   because head_64.S's level2_ident_pgt entries were not counted.
   My fix is not ideal, but works for more and for less than 1G,
   and avoids interfering with early bootup pagetable contortions.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86: fix readb() et al compile error with gcc-3.2.3
Mikael Pettersson [Wed, 13 Aug 2008 19:07:07 +0000]
x86: fix readb() et al compile error with gcc-3.2.3

Building 2.6.27-rc1 on x86 with gcc-3.2.3 fails with:

In file included from include/asm/dma.h:12,
                 from include/linux/bootmem.h:8,
                 from init/main.c:26:
include/asm/io.h: In function `readb':
include/asm/io.h:32: syntax error before string constant
include/asm/io.h: In function `readw':
include/asm/io.h:33: syntax error before string constant
include/asm/io.h: In function `readl':
include/asm/io.h:34: syntax error before string constant
include/asm/io.h: In function `__readb':
include/asm/io.h:36: syntax error before string constant
include/asm/io.h: In function `__readw':
include/asm/io.h:37: syntax error before string constant
include/asm/io.h: In function `__readl':
include/asm/io.h:38: syntax error before string constant
make[1]: *** [init/main.o] Error 1
make: *** [init] Error 2

Starting with 2.6.27-rc1 readb() et al are generated by a
build_mmio_read() macro, which generates asm() statements with
output register constraints like "=" "q", i.e. as two adjacent
string literals. This doesn't work with gcc-3.2.3.

Fixed by moving the "=" part into the callers' reg parameter
(as suggested by Ingo).

Build and boot-tested with gcc-3.2.3 on 32 and 64-bit x86.

Fixes <http://bugzilla.kernel.org/show_bug.cgi?id=11205>.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agoarch/x86/Kconfig: clean up, experimental adjustement
Pavel Machek [Thu, 14 Aug 2008 15:16:50 +0000]
arch/x86/Kconfig: clean up, experimental adjustement

Adjust experimental tags in Kconfig, update config to notice that
i386/x86_64 is now single architecture.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86: invalidate caches before going into suspend
Mark Langsdorf [Thu, 14 Aug 2008 14:11:26 +0000]
x86: invalidate caches before going into suspend

When a CPU core is shut down, all of its caches need to be flushed
to prevent stale data from causing errors if the core is resumed.
Current Linux suspend code performs an assignment after the flush,
which can add dirty data back to the cache.  On some AMD platforms,
additional speculative reads have caused crashes on resume because
of this dirty data.

Relocate the cache flush to be the very last thing done before
halting.  Tie into an assembly line so the compile will not
reorder it.  Add some documentation explaining what is going
on and why we're doing this.

Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Acked-by: Mark Borden <mark.borden@amd.com>
Acked-by: Michael Hohmuth <michael.hohmuth@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86, perfctr: don't use CCCR_OVF_PMI1 on Pentium 4Ds
Aristeu Rozanski [Thu, 14 Aug 2008 20:32:15 +0000]
x86, perfctr: don't use CCCR_OVF_PMI1 on Pentium 4Ds

Currently, setup_p4_watchdog() use CCCR_OVF_PMI1 to enable the counter
overflow interrupts to the second logical core. But this bit doesn't work
on Pentium 4 Ds (model 4, stepping 4) and this patch avoids its use on
these processors. Tested on 4 different machines that have this
specific model with success.

Signed-off-by: Aristeu Rozanski <aris@redhat.com>
Cc: jvillalovos@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agoMerge branch 'x86/amd-iommu' into x86/urgent
Ingo Molnar [Fri, 15 Aug 2008 11:57:32 +0000]
Merge branch 'x86/amd-iommu' into x86/urgent

11 years agox86, AMD IOMMU: initialize dma_ops after sysfs registration
Joerg Roedel [Thu, 14 Aug 2008 17:55:18 +0000]
x86, AMD IOMMU: initialize dma_ops after sysfs registration

If sysfs registration fails all memory used by IOMMU is freed. This
happens after dma_ops initialization and the functions will access the
freed memory then.

Fix this by initializing dma_ops after the sysfs registration.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86m AMD IOMMU: cleanup: replace LOW_U32 macro with generic lower_32_bits
Joerg Roedel [Thu, 14 Aug 2008 17:55:17 +0000]
x86m AMD IOMMU: cleanup: replace LOW_U32 macro with generic lower_32_bits

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86, AMD IOMMU: initialize device table properly
Joerg Roedel [Thu, 14 Aug 2008 17:55:16 +0000]
x86, AMD IOMMU: initialize device table properly

This patch adds device table initializations which forbids memory accesses
for devices per default and disables all page faults.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86, AMD IOMMU: use status bit instead of memory write-back for completion wait
Joerg Roedel [Thu, 14 Aug 2008 17:55:15 +0000]
x86, AMD IOMMU: use status bit instead of memory write-back for completion wait

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86: silence mmconfig printk
Dave Jones [Thu, 14 Aug 2008 19:07:03 +0000]
x86: silence mmconfig printk

There's so much broken mmconfig hardware/bios'es out there,
that classing this as an error seems a little extreme.
Lower its priority to KERN_INFO so that it isn't so noisy
when booting with 'quiet'

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agox86, msr: fix NULL pointer deref due to msr_open on nonexistent CPUs
Darrick J. Wong [Thu, 14 Aug 2008 22:43:33 +0000]
x86, msr: fix NULL pointer deref due to msr_open on nonexistent CPUs

msr_open tests for someone trying to open a device for a nonexistent CPU.
However, the function always returns 0, not ret like it should, hence
userspace can BUG the kernel trivially.  This bug was introduced by the
cdev lock_kernel pushdown patch last May.

The BUG can be reproduced with these commands:

# mknod fubar c 202 8 <-- pick a number less than NR_CPUS that is not
                          the number of an online CPU
# cat fubar

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 years agoMerge branches 'acpica-release-fixes', 'ec-fix', 'dock', 'irq-bounds', 'thermal-fix...
Andi Kleen [Fri, 15 Aug 2008 01:30:00 +0000]
Merge branches 'acpica-release-fixes', 'ec-fix', 'dock', 'irq-bounds', 'thermal-fix', 'wmi' and 'acpi-cleanups' into release-2.6.27

11 years agoACPI: Fix thermal shutdowns
Milan Broz [Tue, 12 Aug 2008 15:48:27 +0000]
ACPI: Fix thermal shutdowns

Do not use unsigned int if there is test for negative number...

See drivers/acpi/processor_perflib.c
  static unsigned int ignore_ppc = -1;
...
  if (event == CPUFREQ_START && ignore_ppc <= 0) {
       ignore_ppc = 0;
...

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

11 years agoACPI: bounds check IRQ to prevent memory corruption
Bjorn Helgaas [Fri, 1 Aug 2008 21:58:17 +0000]
ACPI: bounds check IRQ to prevent memory corruption

acpi_penalize_isa_irq() should validate irq before using it to
index the acpi_irq_penalty[] table.

Here's the path I'm concerned about:

    pnpacpi_parse_allocated_irqresource()
    {
...
irq = acpi_register_gsi(gsi, triggering, polarity);
if (irq >= 0)
pcibios_penalize_isa_irq(irq, 1);

There's no guarantee that acpi_register_gsi() will return an IRQ
within the bounds of acpi_irq_penalty[].

I have not seen a failure I can attribute to this.  However,
ACPI_MAX_IRQS is only 256, and I'm pretty sure ia64 can have
IRQs larger than that.

I think this should go in 2.6.27.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

11 years agoACPI: Avoid bogus EC timeout when EC is in Polling mode
Zhao Yakui [Mon, 11 Aug 2008 02:33:31 +0000]
ACPI: Avoid bogus EC timeout when EC is in Polling mode

When EC is in Polling mode, OS will check the EC status continually by using
the following source code:
       clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
       while (time_before(jiffies, delay)) {
               if (acpi_ec_check_status(ec, event))
                    return 0;
               msleep(1);
       }
But msleep is realized by the function of schedule_timeout. At the same time
although one process is already waken up by some events, it won't be scheduled
immediately. So maybe there exists the following phenomena:
     a. The current jiffies is already after the predefined jiffies.
But before timeout happens, OS has no chance to check the EC
status again.
     b. If preemptible schedule is enabled, maybe preempt schedule will happen
before checking loop. When the process is resumed again, maybe
timeout already happens, which means that OS has no chance to check
the EC status.

In such case maybe EC status is already what OS expects when timeout happens.
But OS has no chance to check the EC status and regards it as AE_TIME.

So it will be more appropriate that OS will try to check the EC status again
when timeout happens. If the EC status is what we expect, it won't be regarded
as timeout. Only when the EC status is not what we expect, it will be regarded
as timeout, which means that EC controller can't give a response in time.

http://bugzilla.kernel.org/show_bug.cgi?id=9823
http://bugzilla.kernel.org/show_bug.cgi?id=11141

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

11 years agoACPI : Add the EC dmi table to fix the incorrect ECDT table
Zhao Yakui [Tue, 12 Aug 2008 02:40:10 +0000]
ACPI : Add the EC dmi table to fix the incorrect ECDT table

On some ASUS laptops the ECDT gives the incorrect command/status & Data I/O
register address.

AK: it seems like the command/data addresses are exchanged.

In such case it will cause that EC device can't be
initialized correctly.
To add the EC dmi table is to fix this issue. If the laptop falls into the
EC dmi table, the EC command/data I/O address will be fixed.

AK: Add comments describing this better

http://bugzilla.kernel.org/show_bug.cgi?id=9399

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
tested-by    : Jan Kasprzak  <kas@fi.muni.cz>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

11 years agoACPI: Properly clear flags on false-positives and send uevent on sudden unplug
Holger Macht [Wed, 6 Aug 2008 15:56:01 +0000]
ACPI: Properly clear flags on false-positives and send uevent on sudden unplug

Some devices emit a ACPI_NOTIFY_DEVICE_CHECK while physically unplugging
even if the software undock has already been done and dock_present() check
fails. However, the internal flags need to be cleared (complete_undock()).

Also, even notify userspace if the dock station suddently went away
without proper software undocking.

This happens on a Acer TravelMate 3000

Signed-off-by: Holger Macht <hmacht@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

11 years agoacpi: trivial cleanups
Pavel Machek [Tue, 12 Aug 2008 10:24:34 +0000]
acpi: trivial cleanups

Trivial cleanups for ACPI. Fix misspelling in printk(), fix mismerge,
add file header.

AK: removed file header

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andi Kleen <ak@linux.intel.com>