]> git.karo-electronics.de Git - karo-tx-linux.git/log
karo-tx-linux.git
12 years agoMerge branch 'perf/urgent'
Ingo Molnar [Sat, 31 Mar 2012 09:53:35 +0000 (11:53 +0200)]
Merge branch 'perf/urgent'

12 years agotracing, sched, vfs: Fix 'old_pid' usage in trace_sched_process_exec()
Oleg Nesterov [Fri, 30 Mar 2012 16:26:36 +0000 (18:26 +0200)]
tracing, sched, vfs: Fix 'old_pid' usage in trace_sched_process_exec()

1. TRACE_EVENT(sched_process_exec) forgets to actually use the
   old pid argument, it sets ->old_pid = p->pid.

2. search_binary_handler() uses the wrong pid number. tracepoint
   needs the global pid_t from the root namespace, while old_pid
   is the virtual pid number as it seen by the tracer/parent.

With this patch we have two pid_t's in search_binary_handler(),
not really nice. Perhaps we should switch to "struct pid*", but
in this case it would be better to cleanup the current code
first and move the "depth == 0" code outside.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: David Smith <dsmith@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Link: http://lkml.kernel.org/r/20120330162636.GA4857@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
12 years agoMerge branch 'perf/uprobes'
Ingo Molnar [Sat, 31 Mar 2012 09:50:15 +0000 (11:50 +0200)]
Merge branch 'perf/uprobes'

12 years agouprobes/core: Optimize probe hits with the help of a counter
Srikar Dronamraju [Fri, 30 Mar 2012 18:26:46 +0000 (23:56 +0530)]
uprobes/core: Optimize probe hits with the help of a counter

Maintain a per-mm counter: number of uprobes that are inserted
on this process address space.

This counter can be used at probe hit time to determine if we
need a lookup in the uprobes rbtree. Everytime a probe gets
inserted successfully, the probe count is incremented and
everytime a probe gets removed, the probe count is decremented.

The new uprobe_munmap hook ensures the count is correct on a
unmap or remap of a region. We expect that once a
uprobe_munmap() is called, the vma goes away.  So
uprobe_unregister() finding a probe to unregister would either
mean unmap event hasnt occurred yet or a mmap event on the same
executable file occured after a unmap event.

Additionally, uprobe_mmap hook now also gets called:

 a. on every executable vma that is COWed at fork.
 b. a vma of interest is newly mapped; breakpoint insertion also
    happens at the required address.

On process creation, make sure the probes count in the child is
set correctly.

Special cases that are taken care include:

 a. mremap
 b. VM_DONTCOPY vmas on fork()
 c. insertion/removal races in the parent during fork().

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Jim Keniston <jkenisto@linux.vnet.ibm.com>
Cc: Linux-mm <linux-mm@kvack.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Anton Arapov <anton@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20120330182646.10018.85805.sendpatchset@srdronam.in.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
12 years agouprobes/core: Allocate XOL slots for uprobes use
Srikar Dronamraju [Fri, 30 Mar 2012 18:26:31 +0000 (23:56 +0530)]
uprobes/core: Allocate XOL slots for uprobes use

Uprobes executes the original instruction at a probed location
out of line. For this, we allocate a page (per mm) upon the
first uprobe hit, in the process user address space, divide it
into slots that are used to store the actual instructions to be
singlestepped. These slots are known as xol (execution out of
line) slots.

Care is taken to ensure that the allocation is in an unmapped
area as close to the top of the user address space as possible,
with appropriate permission settings to keep selinux like
frameworks happy.

Upon a uprobe hit, a free slot is acquired, and is released
after the singlestep completes.

Lots of improvements courtesy suggestions/inputs from Peter and
Oleg.

[ Folded a fix for build issue on powerpc fixed and reported by
  Stephen Rothwell. ]

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Jim Keniston <jkenisto@linux.vnet.ibm.com>
Cc: Linux-mm <linux-mm@kvack.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Anton Arapov <anton@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20120330182631.10018.48175.sendpatchset@srdronam.in.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
12 years agoMerge branch 'sched/urgent'
Ingo Molnar [Sat, 31 Mar 2012 08:44:57 +0000 (10:44 +0200)]
Merge branch 'sched/urgent'

12 years agosched: Fix incorrect usage of for_each_cpu_mask() in select_fallback_rq()
Srivatsa S. Bhat [Fri, 30 Mar 2012 14:10:28 +0000 (19:40 +0530)]
sched: Fix incorrect usage of for_each_cpu_mask() in select_fallback_rq()

The function for_each_cpu_mask() expects a *pointer* to struct
cpumask as its second argument, whereas select_fallback_rq()
passes the value itself.

And moreover, for_each_cpu_mask() has been marked as obselete
in include/linux/cpumask.h. So move to the more appropriate
for_each_cpu() variant.

Reported-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Dave Jones <davej@redhat.com>
Cc: Liu Chuansheng <chuansheng.liu@intel.com>
Cc: vapier@gentoo.org
Cc: rusty@rustcorp.com.au
Link: http://lkml.kernel.org/r/4F75BED4.9050005@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
12 years agoMerge branch 'x86/urgent'
Ingo Molnar [Sat, 31 Mar 2012 07:46:09 +0000 (09:46 +0200)]
Merge branch 'x86/urgent'

12 years agoMerge branch 'x86/cleanups'
Ingo Molnar [Sat, 31 Mar 2012 07:46:07 +0000 (09:46 +0200)]
Merge branch 'x86/cleanups'

12 years agoMerge branch 'linus'
Ingo Molnar [Sat, 31 Mar 2012 07:29:23 +0000 (09:29 +0200)]
Merge branch 'linus'

12 years agoMerge branch 'timers/core'
Ingo Molnar [Sat, 31 Mar 2012 07:29:16 +0000 (09:29 +0200)]
Merge branch 'timers/core'

Conflicts:
Documentation/feature-removal-schedule.txt

12 years agoMerge branch 'perf/urgent'
Ingo Molnar [Sat, 31 Mar 2012 07:28:35 +0000 (09:28 +0200)]
Merge branch 'perf/urgent'

12 years agoMerge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/acme...
Ingo Molnar [Sat, 31 Mar 2012 07:27:41 +0000 (09:27 +0200)]
Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Sat, 31 Mar 2012 01:40:33 +0000 (18:40 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

Pull Sam Ravnborg's sparc32 build fixes from David Miller.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc32: fix fallout from system.h removal

12 years agosparc32: fix fallout from system.h removal
Sam Ravnborg [Fri, 30 Mar 2012 13:53:50 +0000 (15:53 +0200)]
sparc32: fix fallout from system.h removal

Build failures for the typical configs I use

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Sat, 31 Mar 2012 01:15:43 +0000 (18:15 -0700)]
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

Pull kbuild changes from Michal Marek:
 - Unification of cmd_uimage among archs that use it
 - make headers_check tries harder before reporting a missing
   <linux/types.h> include
 - kbuild portability fix for shells that do not support echo -e
 - make clean descends into samples/
 - setlocalversion grep fix
 - modpost typo fix
 - dtc warnings fix

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  setlocalversion: Use "grep -q" instead of piping output to "read dummy"
  modpost: fix ALL_INIT_DATA_SECTIONS
  Kbuild: centralize MKIMAGE and cmd_uimage definitions
  headers_check: recursively search for linux/types.h inclusion
  scripts/Kbuild.include: Fix portability problem of "echo -e"
  scripts: dtc: fix compile warnings
  kbuild: clean up samples directory
  kbuild: disable -Wmissing-field-initializers for W=1

12 years agoMerge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Sat, 31 Mar 2012 01:14:05 +0000 (18:14 -0700)]
Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

Pull non-critical part of kbuild from Michal Marek:
 - New semantic patches, make coccicheck M= fix
 - make gtags speedup
 - make tags/TAGS always removes struct forward declarations
 - make deb-pkg fixes (some patches are still pending, I know)
 - scripts/patch-kernel fix from the last user of this script ;)

* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  scripts/patch-kernel: digest kernel.org hosted .xz patches
  scripts/coccinelle/api/ptr_ret.cocci: semantic patch for ptr_err
  scripts: refactor remove structure forward declarations
  kbuild: incremental tags update for GNU Global
  coccinelle: semantic patch for bool issues
  coccinelle: semantic patch to check for PTR_ERR after reassignment
  coccinelle: semantic patch converting 0 test to null test
  coccinelle: semantic patch for missing iounmap
  coccinelle: semantic patch for missing clk_put
  kbuild: Fix out-of-tree build for 'make deb-pkg'
  kbuild: Only build linux-image package for UML
  kbuild: Fix link to headers in 'make deb-pkg'
  coccicheck: change handling of C={1,2} when M= is set

12 years agoMerge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Sat, 31 Mar 2012 01:13:17 +0000 (18:13 -0700)]
Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

Pull kconfig bits from Michal Marek:
 "There is one fix for make oldconfig by Arnaud and updates to the
  merge_config.sh tool."

* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  merge_config.sh: Add option to display redundant configs
  merge_config.sh: Set execute bit
  merge_config.sh: Use the first file as the initial config
  kconfig: fix new choices being skipped upon config update

12 years agoMerge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 31 Mar 2012 01:08:05 +0000 (18:08 -0700)]
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull genirq updates from Thomas Gleixner.

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Adjust irq thread affinity on IRQ_SET_MASK_OK_NOCOPY return value
  genirq: Respect NUMA node affinity in setup_irq_irq affinity()
  genirq: Get rid of unneeded force parameter in irq_finalize_oneshot()
  genirq: Minor readablity improvement in irq_wake_thread()

12 years agoMerge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 31 Mar 2012 01:07:13 +0000 (18:07 -0700)]
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull core locking updates from Thomas Gleixner.

* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Mark get_robust_list as deprecated
  futex: Do not leak robust list to unprivileged process

12 years agoMerge tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6
Linus Torvalds [Sat, 31 Mar 2012 00:31:56 +0000 (17:31 -0700)]
Merge tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6

Pull MTD changes from David Woodhouse:
 - Artem's cleanup of the MTD API continues apace.
 - Fixes and improvements for ST FSMC and SuperH FLCTL NAND, amongst
   others.
 - More work on DiskOnChip G3, new driver for DiskOnChip G4.
 - Clean up debug/warning printks in JFFS2 to use pr_<level>.

Fix up various trivial conflicts, largely due to changes in calling
conventions for things like dmaengine_prep_slave_sg() (new inline
wrapper to hide new parameter, clashing with rewrite of previously last
parameter that used to be an 'append' flag, and is now a bitmap of
'unsigned long flags').

(Also some header file fallout - like so many merges this merge window -
and silly conflicts with sparse fixes)

* tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6: (120 commits)
  mtd: docg3 add protection against concurrency
  mtd: docg3 refactor cascade floors structure
  mtd: docg3 increase write/erase timeout
  mtd: docg3 fix inbound calculations
  mtd: nand: gpmi: fix function annotations
  mtd: phram: fix section mismatch for phram_setup
  mtd: unify initialization of erase_info->fail_addr
  mtd: support ONFI multi lun NAND
  mtd: sm_ftl: fix typo in major number.
  mtd: add device-tree support to spear_smi
  mtd: spear_smi: Remove default partition information from driver
  mtd: Add device-tree support to fsmc_nand
  mtd: fix section mismatch for doc_probe_device
  mtd: nand/fsmc: Remove sparse warnings and errors
  mtd: nand/fsmc: Add DMA support
  mtd: nand/fsmc: Access the NAND device word by word whenever possible
  mtd: nand/fsmc: Use dev_err to report error scenario
  mtd: nand/fsmc: Use devm routines
  mtd: nand/fsmc: Modify fsmc driver to accept nand timing parameters via platform
  mtd: fsmc_nand: add pm callbacks to support hibernation
  ...

12 years agoMerge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
Linus Torvalds [Sat, 31 Mar 2012 00:00:34 +0000 (17:00 -0700)]
Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull a few more ARM platform fixes from Olof Johansson:
 "Apologies for back-to-back fixes pull requests, but one of the patches
  below are the kind we'll see posted over and over if we don't send it
  in.  I hadn't done the full sanity-check of defconfig builds by the
  time I sent up the other fixes yesterday or I would have included it
  then.

  Two patches, one dealing with the system.h fallout, the other is a
  missing linux/bug.h in a place where ARRAY_SIZE() is used."

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: clps711x: fix missing include file
  ARM: fix builds due to missing <asm/system_misc.h> includes

12 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Linus Torvalds [Fri, 30 Mar 2012 23:45:38 +0000 (16:45 -0700)]
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux

Pull ACPI & Power Management changes from Len Brown:
 - ACPI 5.0 after-ripples, ACPICA/Linux divergence cleanup
 - cpuidle evolving, more ARM use
 - thermal sub-system evolving, ditto
 - assorted other PM bits

Fix up conflicts in various cpuidle implementations due to ARM cpuidle
cleanups (ARM at91 self-refresh and cpu idle code rewritten into
"standby" in asm conflicting with the consolidation of cpuidle time
keeping), trivial SH include file context conflict and RCU tracing fixes
in generic code.

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (77 commits)
  ACPI throttling: fix endian bug in acpi_read_throttling_status()
  Disable MCP limit exceeded messages from Intel IPS driver
  ACPI video: Don't start video device until its associated input device has been allocated
  ACPI video: Harden video bus adding.
  ACPI: Add support for exposing BGRT data
  ACPI: export acpi_kobj
  ACPI: Fix logic for removing mappings in 'acpi_unmap'
  CPER failed to handle generic error records with multiple sections
  ACPI: Clean redundant codes in scan.c
  ACPI: Fix unprotected smp_processor_id() in acpi_processor_cst_has_changed()
  ACPI: consistently use should_use_kmap()
  PNPACPI: Fix device ref leaking in acpi_pnp_match
  ACPI: Fix use-after-free in acpi_map_lsapic
  ACPI: processor_driver: add missing kfree
  ACPI, APEI: Fix incorrect APEI register bit width check and usage
  Update documentation for parameter *notrigger* in einj.txt
  ACPI, APEI, EINJ, new parameter to control trigger action
  ACPI, APEI, EINJ, limit the range of einj_param
  ACPI, APEI, Fix ERST header length check
  cpuidle: power_usage should be declared signed integer
  ...

12 years agoMerge git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Fri, 30 Mar 2012 23:24:38 +0000 (16:24 -0700)]
Merge git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French.

* git://git.samba.org/sfrench/cifs-2.6:
  [CIFS] Update CIFS version number to 1.77
  CIFS: Add missed forcemand mount option
  [CIFS] Fix trivial sparse warning with asyn i/o patch
  cifs: handle "sloppy" option appropriately
  cifs: use standard token parser for mount options
  cifs: remove /proc/fs/cifs/OplockEnabled
  cifs: convert cifs_iovec_write to use async writes
  cifs: call cifs_update_eof with i_lock held
  cifs: abstract out function to marshal up the iovec array for async writes
  cifs: fix up get_numpages
  cifs: make cifsFileInfo_get return the cifsFileInfo pointer
  cifs: fix allocation in cifs_write_allocate_pages
  cifs: allow caller to specify completion op when allocating writedata
  cifs: add pid field to cifs_writedata
  cifs: add new cifsiod_wq workqueue
  CIFS: Change mid_q_entry structure fields
  CIFS: Expand CurrentMid field
  CIFS: Separate protocol-specific code from cifs_readv_receive code
  CIFS: Separate protocol-specific code from demultiplex code
  CIFS: Separate protocol-specific code from transport routines

12 years agoMerge tag 'for-v3.4-rc1' of git://git.infradead.org/battery-2.6
Linus Torvalds [Fri, 30 Mar 2012 23:09:02 +0000 (16:09 -0700)]
Merge tag 'for-v3.4-rc1' of git://git.infradead.org/battery-2.6

Pull battery updates from Anton Vorontsov:
 "Various small bugfixes and enhancements, plus two new drivers:
   - A quite complex ab8500 charger driver, submitted by Arun Murthy @
     ST-Ericsson;
   - Summit Microelectronics SMB347 Battery Charger, submitted by Bruce
     E Robertson and Alan Cox @ Intel.

  And that's all."

* tag 'for-v3.4-rc1' of git://git.infradead.org/battery-2.6: (36 commits)
  max17042_battery: Clean up interrupt handling
  Revert "max8998_charger: Include linux/module.h just once"
  ab8500_fg: Fix some build warnings on x86_64
  max17042_battery: Fix CHARGE_FULL representation.
  max8998_charger: Include linux/module.h just once
  power_supply: Convert i2c drivers to module_i2c_driver
  lp8727_charger: Add MODULE_DEVICE_TABLE
  charger-manager: Simplify charger_get_property(), get rid of a warning
  charger-manager: Clean up for better readability
  da9052-battery: Convert to use module_platform_driver
  da9052-battery: Fix a memory leak when unload the module
  da9052-battery: Add missing platform_set_drvdata
  ab8500: Turn unneeded global symbols into local ones
  ab8500_fg: Fix copy-paste error
  ab8500_fg: Get rid of 'struct battery_type'
  ab8500_fg: Get rid of 'struct v_to_cap'
  ab8500_btemp: Get rid of 'enum adc_therm'
  ab8500_charger: Convert to the new USB OTG calls
  ab8500-btemp: AB8500 battery temperature driver
  ab8500-fg: A8500 fuel gauge driver
  ...

12 years agoMerge branch 'dunlap' (Randy's Documentation patches)
Linus Torvalds [Fri, 30 Mar 2012 23:03:55 +0000 (16:03 -0700)]
Merge branch 'dunlap' (Randy's Documentation patches)

Merge Documentation fixes from Randy Dunlap.

Fixed up several small annoyances (bad changelogs and corrupted utf8
names), I need to try to convince people to do things right.

* emailed from Randy Dunlap <rdunlap@xenotime.net>:
  Documentation: fix typo in ABI/stable/sysfs-driver-usb-usbtmc
  Documentation: replace install commands with softdeps
  Documentation: remove references to /etc/modprobe.conf
  Documentation: input.txt: clarify mousedev 'cat' command syntax
  Documentation: CodingStyle: add inline assembly guidelines
  Documentation: sysrq: Crutcher Dunnavant is unavailable
  Documentation: mention scripts/diffconfig tool
  Documentation: remove 'mach' from dontdiff file

12 years agoDocumentation: fix typo in ABI/stable/sysfs-driver-usb-usbtmc
Rafal Kapela [Fri, 30 Mar 2012 20:37:26 +0000 (13:37 -0700)]
Documentation: fix typo in ABI/stable/sysfs-driver-usb-usbtmc

Fix "the the" in ABI/stable/sysfs-driver-usb-usbtmc

Signed-off-by: Rafal Kapela <raf.kapela@gmail.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoDocumentation: replace install commands with softdeps
Lucas De Marchi [Fri, 30 Mar 2012 20:37:20 +0000 (13:37 -0700)]
Documentation: replace install commands with softdeps

Install commands should not be used to specify soft dependencies among
modules. When loading modules it's much better to have a softdep that
modprobe knows what's being done than having to fork/exec another
instance of modprobe to load the other module.

By using a softdep user has also an option to remove the dependencies
when removing the module (and if its refcount dropped to 0)

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoDocumentation: remove references to /etc/modprobe.conf
Lucas De Marchi [Fri, 30 Mar 2012 20:37:16 +0000 (13:37 -0700)]
Documentation: remove references to /etc/modprobe.conf

Usage of /etc/modprobe.conf file was deprecated by module-init-tools and
is no longer parsed by new kmod tool. References to this file are
replaced in Documentation, comments and Kconfig according to the
context.

There are also some references to the old /etc/modules.conf from 2.4
kernels that are being removed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoDocumentation: input.txt: clarify mousedev 'cat' command syntax
Randy Dunlap [Fri, 30 Mar 2012 20:37:13 +0000 (13:37 -0700)]
Documentation: input.txt: clarify mousedev 'cat' command syntax

Clarify that the 'cat' command does not include the (c, 13, 32)
after it.

Reported-by: Dan Jidanni Jacobson <jidanni@jidanni.org>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoDocumentation: CodingStyle: add inline assembly guidelines
Josh Triplett [Fri, 30 Mar 2012 20:37:10 +0000 (13:37 -0700)]
Documentation: CodingStyle: add inline assembly guidelines

Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoDocumentation: sysrq: Crutcher Dunnavant is unavailable
Randy Dunlap [Fri, 30 Mar 2012 20:37:06 +0000 (13:37 -0700)]
Documentation: sysrq: Crutcher Dunnavant is unavailable

Reported-by: Křištof Želechovski <giecrilj@stegny.2a.pl>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoDocumentation: mention scripts/diffconfig tool
Javi Merino [Fri, 30 Mar 2012 20:37:02 +0000 (13:37 -0700)]
Documentation: mention scripts/diffconfig tool

The kconfig documentation suggests using plain 'diff' to compare config
files and then adds "Yes, we need something better here".  Commit
a717417e7f96 ("kconfig: add diffconfig utility") added what that comment
was looking for.

Signed-off-by: Javi Merino <javi.merino@arm.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoDocumentation: remove 'mach' from dontdiff file
H Hartley Sweeten [Fri, 30 Mar 2012 20:36:58 +0000 (13:36 -0700)]
Documentation: remove 'mach' from dontdiff file

The mach entry in the dontdiff file causes all the
arch/arm/mach-*/include/mach directories to be skipped.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoARM: clps711x: fix missing include file
Olof Johansson [Fri, 30 Mar 2012 06:34:29 +0000 (23:34 -0700)]
ARM: clps711x: fix missing include file

linux/bug.h is needed due to an ARRAY_SIZE being used:

arch/arm/mach-clps711x/edb7211-mm.c: In function 'edb7211_map_io':
arch/arm/mach-clps711x/edb7211-mm.c:79:9: error: implicit declaration of function 'BUILD_BUG_ON_ZERO'

Signed-off-by: Olof Johansson <olof@lixom.net>
12 years agoARM: fix builds due to missing <asm/system_misc.h> includes
Olof Johansson [Fri, 30 Mar 2012 06:22:44 +0000 (23:22 -0700)]
ARM: fix builds due to missing <asm/system_misc.h> includes

This does a sweeping change fixing up all the missing system_misc.h and
system_info.h includes from the system.h split-up change. These were the
ones I came across when building all defconfigs in arch/arm/configs, there
might be more but they lack adequate build coverage to be easily caught.

I'm expecting to get a lot of these piecemeal by each maintainer, so we
might just as well do one sweeping change to get them all at once.

Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Krzysztof Halasa <khc@pm.waw.pl>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
12 years agogenirq: Adjust irq thread affinity on IRQ_SET_MASK_OK_NOCOPY return value
Jiang Liu [Fri, 30 Mar 2012 15:11:33 +0000 (23:11 +0800)]
genirq: Adjust irq thread affinity on IRQ_SET_MASK_OK_NOCOPY return value

irq_move_masked_irq() checks the return code of
chip->irq_set_affinity() only for 0, but IRQ_SET_MASK_OK_NOCOPY is
also a valid return code, which is there to avoid a redundant copy of
the cpumask. But in case of IRQ_SET_MASK_OK_NOCOPY we not only avoid
the redundant copy, we also fail to adjust the thread affinity of an
eventually threaded interrupt handler.

Handle IRQ_SET_MASK_OK (==0) and IRQ_SET_MASK_OK_NOCOPY(==1) return
values correctly by checking the valid return values seperately.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Jiang Liu <liuj97@gmail.com>
Cc: Keping Chen <chenkeping@huawei.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1333120296-13563-2-git-send-email-jiang.liu@huawei.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
12 years agoMerge branch 'tboot' into release
Len Brown [Fri, 30 Mar 2012 20:35:53 +0000 (16:35 -0400)]
Merge branch 'tboot' into release

Conflicts:
drivers/acpi/acpica/hwsleep.c

Text conflict between:

2feec47d4c5f80b05f1650f5a24865718978eea4
(ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registers)

which removed #include "actables.h"

and

09f98a825a821f7a3f1b162f9ed023f37213a63b
(x86, acpi, tboot: Have a ACPI os prepare sleep instead of calling tboot_sleep.)

which removed #include <linux/tboot.h>

The resolution is to remove them both.

Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoMerge branch 'd3' into release
Len Brown [Fri, 30 Mar 2012 20:21:26 +0000 (16:21 -0400)]
Merge branch 'd3' into release

Conflicts:
drivers/acpi/sleep.c

This was a text conflict between
a2ef5c4fd44ce3922435139393b89f2cce47f576
(ACPI: Move module parameter gts and bfs to sleep.c)

which added #include <linux/module.h>

and

b24e5098853653554baf6ec975b9e855f3d6e5c0
(ACPI, PCI: Move acpi_dev_run_wake() to ACPI core)

which added #include <linux/pm_runtime.h>

The resolution was to take them both.

Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoMerge branch 'apei' into release
Len Brown [Fri, 30 Mar 2012 20:12:23 +0000 (16:12 -0400)]
Merge branch 'apei' into release

Conflicts:
drivers/acpi/apei/apei-base.c

This was a conflict between

15afae604651d4e17652d2ffb56f5e36f991cfef
(CPI, APEI: Fix incorrect APEI register bit width check and usage)

and

653f4b538f66d37db560e0f56af08117136d29b7
(ACPICA: Expand OSL memory read/write interfaces to 64 bits)

The former changed a parameter in the call to acpi_os_read_memory64()
and the later replaced all calls to acpi_os_read_memory64()
with calls to acpi_os_read_memory().

Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoMerge branches 'acpica', 'bgrt', 'bz-11533', 'cpuidle', 'ec', 'hotplug', 'misc',...
Len Brown [Fri, 30 Mar 2012 20:10:37 +0000 (16:10 -0400)]
Merge branches 'acpica', 'bgrt', 'bz-11533', 'cpuidle', 'ec', 'hotplug', 'misc', 'red-hat-bz-727865', 'thermal', 'throttling', 'turbostat' and 'video' into release

Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI throttling: fix endian bug in acpi_read_throttling_status()
Dan Carpenter [Wed, 7 Mar 2012 11:57:36 +0000 (14:57 +0300)]
ACPI throttling: fix endian bug in acpi_read_throttling_status()

Using a u64 here creates an endian bug.  We store a u32 number in the
top byte which is a larger number than intended on big endian systems.
There is no reason to use a 64 bit data type here, I guess it was just
an oversight.

I removed the initialization to zero as well.  It's needed with a u64
but with a u32, the variable gets initialized properly inside the call
to acpi_os_read_port().

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoDisable MCP limit exceeded messages from Intel IPS driver
Andi Kleen [Mon, 6 Feb 2012 16:17:12 +0000 (08:17 -0800)]
Disable MCP limit exceeded messages from Intel IPS driver

On a system on the thermal limit these are quite noisy and flood the logs.
Better would be a counter anyways. But given that we don't even have
anything for normal throttling this doesn't seem to be urgent either.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI video: Don't start video device until its associated input device has been allocated
Igor Murzov [Fri, 30 Mar 2012 17:32:09 +0000 (21:32 +0400)]
ACPI video: Don't start video device until its associated input device has been allocated

Quoth Dmitry Torokhov:
In addition to bus notifier we do install device notifier explicitly
so it might fire up early. The easiest fox would be to move
acpi_video_bus_start_devices() after input_allocate_device() but
before input_register_device() - unregistered input devices can handle
input_event() calls just fine.

May fix crashes reported in:
https://bugzilla.kernel.org/show_bug.cgi?id=40672

Signed-off-by: Igor Murzov <e-mail@date.by>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Fri, 30 Mar 2012 19:44:29 +0000 (12:44 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes and features from Chris Mason:
 "We've merged in the error handling patches from SuSE.  These are
  already shipping in the sles kernel, and they give btrfs the ability
  to abort transactions and go readonly on errors.  It involves a lot of
  churn as they clarify BUG_ONs, and remove the ones we now properly
  deal with.

  Josef reworked the way our metadata interacts with the page cache.
  page->private now points to the btrfs extent_buffer object, which
  makes everything faster.  He changed it so we write an whole extent
  buffer at a time instead of allowing individual pages to go down,,
  which will be important for the raid5/6 code (for the 3.5 merge
  window ;)

  Josef also made us more aggressive about dropping pages for metadata
  blocks that were freed due to COW.  Overall, our metadata caching is
  much faster now.

  We've integrated my patch for metadata bigger than the page size.
  This allows metadata blocks up to 64KB in size.  In practice 16K and
  32K seem to work best.  For workloads with lots of metadata, this cuts
  down the size of the extent allocation tree dramatically and fragments
  much less.

  Scrub was updated to support the larger block sizes, which ended up
  being a fairly large change (thanks Stefan Behrens).

  We also have an assortment of fixes and updates, especially to the
  balancing code (Ilya Dryomov), the back ref walker (Jan Schmidt) and
  the defragging code (Liu Bo)."

Fixed up trivial conflicts in fs/btrfs/scrub.c that were just due to
removal of the second argument to k[un]map_atomic() in commit
7ac687d9e047.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (75 commits)
  Btrfs: update the checks for mixed block groups with big metadata blocks
  Btrfs: update to the right index of defragment
  Btrfs: do not bother to defrag an extent if it is a big real extent
  Btrfs: add a check to decide if we should defrag the range
  Btrfs: fix recursive defragment with autodefrag option
  Btrfs: fix the mismatch of page->mapping
  Btrfs: fix race between direct io and autodefrag
  Btrfs: fix deadlock during allocating chunks
  Btrfs: show useful info in space reservation tracepoint
  Btrfs: don't use crc items bigger than 4KB
  Btrfs: flush out and clean up any block device pages during mount
  btrfs: disallow unequal data/metadata blocksize for mixed block groups
  Btrfs: enhance superblock sanity checks
  Btrfs: change scrub to support big blocks
  Btrfs: minor cleanup in scrub
  Btrfs: introduce common define for max number of mirrors
  Btrfs: fix infinite loop in btrfs_shrink_device()
  Btrfs: fix memory leak in resolver code
  Btrfs: allow dup for data chunks in mixed mode
  Btrfs: validate target profiles only if we are going to use them
  ...

12 years agoACPI video: Harden video bus adding.
Igor Murzov [Fri, 30 Mar 2012 17:32:08 +0000 (21:32 +0400)]
ACPI video: Harden video bus adding.

It is always better to check return values, so add some new checks and
correct existing ones.

v2: Be consistent and don't mix errors from -E* and AE_* namespaces.

Signed-off-by: Igor Murzov <e-mail@date.by>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoia64: Fixup asm/cmpxchg.h
David Howells [Fri, 30 Mar 2012 18:43:11 +0000 (11:43 -0700)]
ia64: Fixup asm/cmpxchg.h

The empty asm/cmpxchg.h file that was provided as a temporary build fix
for the asm/system.h disintgration build problem should really include
<asm/intrinsics.h> to make definitions of xchg() and cmpxchg()
available.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge tag 'sound-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Fri, 30 Mar 2012 17:59:52 +0000 (10:59 -0700)]
Merge tag 'sound-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A collection of small fixes for 3.4-rc1, including
   - mic-recording regression fix for Realtek codec
   - clean-up of dmaengine parameter mess
   - WM8894 calibration tweak
   - minor fixes for asihpi and some bool module parms"

* tag 'sound-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: fix isa/opti9xx module param type
  sound: fix oss/msnd_pinnacle module param type
  ALSA: asihpi - fix return type of hpios_locked_mem_alloc()
  ASoC: dmaengine_pcm: use dmaengine cyclic wrapper
  ASoC: Add extra parameter to device_prep_dma_cyclic
  ALSA: hda/realtek - Fix ADC assignment with a shared HP/Mic pin
  ASoC: wm8994: Update WM8994 DCS calibration

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Fri, 30 Mar 2012 17:57:40 +0000 (10:57 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 build fixes from Martin Schwidefsky.

More small fixes for the system.h disintegration.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  [S390] Fix build errors (fallout from system.h disintegration)

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Fri, 30 Mar 2012 17:56:11 +0000 (10:56 -0700)]
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

Pull minor Sparc fixes from David Miller:
 "This just fixes build fallout due to recent changes that went int your
  tree."

Sam Ravnborg says that sparc32 still needs some more tender loving.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc: Fix even more fallout from system.h split.
  sparc: fix fallout from system.h split

12 years agodebug: Add CONFIG_READABLE_ASM
Andi Kleen [Wed, 28 Mar 2012 18:51:18 +0000 (11:51 -0700)]
debug: Add CONFIG_READABLE_ASM

Add a config option to disable various gcc compiler optimizations that
make assembler listings much harder to read. This is everything that reorders
code significantly or creates partial functions.

This is mainly to keep kernel hackers sane.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1332960678-11879-2-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agox86: Use -mno-avx when available
Andi Kleen [Wed, 28 Mar 2012 18:51:17 +0000 (11:51 -0700)]
x86: Use -mno-avx when available

On gccs that support AVX it's a good idea to disable that too, similar to
how SSE2, SSE1 etc. are already disabled. This prevents the compiler
from generating AVX ever implicitely.

No failure observed, just from review.

[ hpa: Marking this for urgent and stable, simply because the patch
  will either have absolutely no effect *or* it will avoid potentially
  very hard to debug failures. ]

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1332960678-11879-1-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@vger.kernel.org>
12 years agox86: spinlock.h: Remove REG_PTR_MODE
Richard Weinberger [Thu, 29 Mar 2012 23:38:03 +0000 (01:38 +0200)]
x86: spinlock.h: Remove REG_PTR_MODE

REG_PTR_MODE has no users at all.

Signed-off-by: Richard Weinberger <richard@nod.at>
Link: http://lkml.kernel.org/r/1333064283-3109-1-git-send-email-richard@nod.at
Acked-by: Acked-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
12 years agoperf tools: Remove auto-generated bison/flex files
Ingo Molnar [Thu, 29 Mar 2012 16:08:38 +0000 (13:08 -0300)]
perf tools: Remove auto-generated bison/flex files

These should not be in the Git history - they are auto-generated.

Extend the Makefile rules of the parser files to include the generation
run.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120327183335.GA27621@gmail.com
[ committer note: Fixed up O= handling ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
12 years agoproc: stats: Use arch_idle_time for idle and iowait times if available
Martin Schwidefsky [Fri, 30 Mar 2012 10:23:08 +0000 (12:23 +0200)]
proc: stats: Use arch_idle_time for idle and iowait times if available

Git commit a25cac5198d4ff28 "proc: Consider NO_HZ when printing idle and
iowait times" changes the code for /proc/stat to use get_cpu_idle_time_us
and get_cpu_iowait_time_us if the system is running with nohz enabled.
For architectures which define arch_idle_time (currently s390 only)
this is a change for the worse. The result of arch_idle_time is supposed
to be the exact sleep time of the target cpu and should be used instead
of the value kept by the scheduler.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20120330122308.18720283@de.ibm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
12 years agoitimer: Schedule silent NULL pointer fixup in setitimer() for removal
Sasikantha babu [Wed, 21 Mar 2012 14:40:54 +0000 (20:10 +0530)]
itimer: Schedule silent NULL pointer fixup in setitimer() for removal

setitimer() should return -EFAULT if called with an invalid pointer
for value. The current code excludes a NULL pointer from this rule and
silently uses it to stop the timer. This violates the spec.

Warn about user space apps which rely on that feature and schedule it
for removal.

[ tglx: Massaged changelog, warn message and Doc entry ]

Signed-off-by: Sasikantha babu <sasikanth.v19@gmail.com>
Link: http://lkml.kernel.org/r/1332340854-26053-1-git-send-email-sasikanth.v19@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
12 years agoscripts/patch-kernel: digest kernel.org hosted .xz patches
Shawn Landden [Mon, 12 Mar 2012 22:13:37 +0000 (15:13 -0700)]
scripts/patch-kernel: digest kernel.org hosted .xz patches

kernel.org is hosting patches and kernel compressed with xz (lzma2+).
Allow scripts/patch-kernel to decompress these files.

Signed-off-by: Shawn Landden <shawnlandden@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
12 years agomerge_config.sh: Add option to display redundant configs
John Stultz [Fri, 23 Mar 2012 19:52:08 +0000 (12:52 -0700)]
merge_config.sh: Add option to display redundant configs

Provide a -r option to display when fragments contain redundant
options. This is really useful when breaking apart a config into
fragments, as well as cleaning up older fragments.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Acked-by: Darren Hart <dvhart@linux.intel.com>
Acked-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
12 years agomerge_config.sh: Set execute bit
John Stultz [Thu, 22 Mar 2012 22:05:48 +0000 (15:05 -0700)]
merge_config.sh: Set execute bit

Somehow the merge_config.sh script didn't get its execute bit
set when it was merged. Fix this.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Acked-by: Darren Hart <dvhart@linux.intel.com>
Acked-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
12 years agoMerge branch 'linus'
Ingo Molnar [Fri, 30 Mar 2012 08:38:21 +0000 (10:38 +0200)]
Merge branch 'linus'

12 years agoACPI: Add support for exposing BGRT data
Matthew Garrett [Tue, 31 Jan 2012 18:19:20 +0000 (13:19 -0500)]
ACPI: Add support for exposing BGRT data

ACPI 5.0 adds the BGRT, a table that contains a pointer to the firmware
boot splash and associated metadata. This simple driver exposes it via
/sys/firmware/acpi in order to allow bootsplash applications to draw their
splash around the firmware image and reduce the number of jarring graphical
transitions during boot.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: export acpi_kobj
Matthew Garrett [Tue, 31 Jan 2012 18:19:19 +0000 (13:19 -0500)]
ACPI: export acpi_kobj

Drivers may wish to add entries to /sys/firmware/acpi, so export acpi_kobj
in order to let them do that.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: Fix logic for removing mappings in 'acpi_unmap'
Myron Stowe [Thu, 9 Feb 2012 16:36:41 +0000 (09:36 -0700)]
ACPI: Fix logic for removing mappings in 'acpi_unmap'

Make sure the removal of mappings uses the same logic that put the
mappings in place.

Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoCPER failed to handle generic error records with multiple sections
Jiang Liu [Tue, 14 Feb 2012 16:01:44 +0000 (00:01 +0800)]
CPER failed to handle generic error records with multiple sections

The function apei_estatus_print() and apei_estatus_check() forget to move ahead
the gdata pointer when dealing with multiple generic error data sections.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: Clean redundant codes in scan.c
Alex He [Tue, 21 Feb 2012 08:58:10 +0000 (16:58 +0800)]
ACPI: Clean redundant codes in scan.c

Clean the redundant codes of apci_bus_get_power_flags().

Signed-off-by: Alex He <alex.he@amd.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: Fix unprotected smp_processor_id() in acpi_processor_cst_has_changed()
Paul E. McKenney [Tue, 28 Feb 2012 21:27:44 +0000 (13:27 -0800)]
ACPI: Fix unprotected smp_processor_id() in acpi_processor_cst_has_changed()

The acpi_processor_cst_has_changed() function is invoked from a
CPU_ONLINE or CPU_DEAD function, which might well execute on CPU 0
even though the CPU being hotplugged is some other CPU.  In addition,
acpi_processor_cst_has_changed() invokes smp_processor_id() without
protection, resulting in splats when onlining CPUs.

This commit therefore changes the smp_processor_id() to pr->id, as is
used elsewhere in the code, for example, in acpi_processor_add().

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Tested-by: Yong Zhang <yong.zhang0@gmail.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: consistently use should_use_kmap()
Jan Beulich [Fri, 24 Feb 2012 11:41:53 +0000 (11:41 +0000)]
ACPI: consistently use should_use_kmap()

... so that acpi_unmap()'s behavior gets in sync with acpi_map()'s.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years ago[S390] Fix build errors (fallout from system.h disintegration)
Heiko Carstens [Fri, 30 Mar 2012 07:40:55 +0000 (09:40 +0200)]
[S390] Fix build errors (fallout from system.h disintegration)

Signed-off-by: Heiko Carstens <h.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
12 years agoPNPACPI: Fix device ref leaking in acpi_pnp_match
Yinghai Lu [Sat, 3 Mar 2012 21:29:20 +0000 (13:29 -0800)]
PNPACPI: Fix device ref leaking in acpi_pnp_match

During testing pci root bus removal, found some root bus bridge is not freed.
If booting with pnpacpi=off, those hostbridge could be freed without problem.
It turns out that some devices reference are not released during acpi_pnp_match.
that match should not hold one device ref during every calling.
Add pu_device calling before returning.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: Fix use-after-free in acpi_map_lsapic
Petr Vandrovec [Thu, 8 Mar 2012 21:33:24 +0000 (13:33 -0800)]
ACPI: Fix use-after-free in acpi_map_lsapic

When processor is being hot-added to the system, acpi_map_lsapic invokes
ACPI _MAT method to find APIC ID and flags, verifies that returned structure
is indeed ACPI's local APIC structure, and that flags contain MADT_ENABLED
bit.  Then saves APIC ID, frees structure - and accesses structure when
computing arguments for acpi_register_lapic call.  Which sometime leads
to acpi_register_lapic call being made with second argument zero, failing
to bring processor online with error 'Unable to map lapic to logical cpu
number'.

As lapic->lapic_flags & ACPI_MADT_ENABLED was already confirmed to be non-zero
few lines above, we can just pass unconditional ACPI_MADT_ENABLED to the
acpi_register_lapic.

Signed-off-by: Petr Vandrovec <petr@vmware.com>
Signed-off-by: Alok N Kataria <akataria@vmware.com>
Reviewed-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: processor_driver: add missing kfree
Julia Lawall [Thu, 15 Mar 2012 08:32:05 +0000 (09:32 +0100)]
ACPI: processor_driver: add missing kfree

The function acpi_processor_add is stored in the ops.add field of a
acpi_driver structure.  This function is then called in
acpi_bus_driver_init.  On failure, this function clears the field
device->driver_data, but does not free its contents.  Thus the free has to
be done by the add function.  In acpi_processor_add, the corresponding
value is pr.  This value is currently freed on failure before storing it in
device->driver_data, but not after.  This free is added in the error
handling code at the end of the function.  The per_cpu variable
processors is also cleared so that it does not refer to a dangling pointer.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI, APEI: Fix incorrect APEI register bit width check and usage
Gary Hade [Wed, 21 Mar 2012 22:28:50 +0000 (15:28 -0700)]
ACPI, APEI: Fix incorrect APEI register bit width check and usage

The current code incorrectly assumes that
(1) the APEI register bit width is always 8, 16, 32, or 64 and
(2) the APEI register bit width is always equal to the APEI
    register access width.

ERST serialization instructions entries such as:

[030h 0048   1]                       Action : 00 [Begin Write Operation]
[031h 0049   1]                  Instruction : 03 [Write Register Value]
[032h 0050   1]        Flags (decoded below) : 01
                      Preserve Register Bits : 1
[033h 0051   1]                     Reserved : 00

[034h 0052  12]              Register Region : [Generic Address Structure]
[034h 0052   1]                     Space ID : 00 [SystemMemory]
[035h 0053   1]                    Bit Width : 03
[036h 0054   1]                   Bit Offset : 00
[037h 0055   1]         Encoded Access Width : 03 [DWord Access:32]
[038h 0056   8]                      Address : 000000007F2D7038

[040h 0064   8]                        Value : 0000000000000001
[048h 0072   8]                         Mask : 0000000000000007

break this assumption by yielding:
  [Firmware Bug]: APEI: Invalid bit width in GAR [0x7f2d7038/3/0]

I have found no ACPI specification requirements corresponding
with the above assumptions.  There is even a good example in
the Serialization Instruction Entries section (ACPI 4.0 section
17.4,1.2, ACPI 4.0a section 2.5.1.2, ACPI 5.0 section 18.5.1.2)
that mentions a serialization instruction with a bit range of
[6:2] which is 5 bits wide, _not_ 8, 16, 32, or 64 bits wide.

Compile and boot tested with 3.3.0-rc7 on a IBM HX5.

Signed-off-by: Gary Hade <garyhade@us.ibm.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoUpdate documentation for parameter *notrigger* in einj.txt
Chen Gong [Thu, 15 Mar 2012 08:53:37 +0000 (16:53 +0800)]
Update documentation for parameter *notrigger* in einj.txt

Add description of parameter notrigger in the einj.txt.
One can utilize this new parameter to do some SRAR injection
test. Pay attention, the operation is highly depended on the
BIOS implementation. If no proper BIOS supports it, even if
enabling this parameter, expected result will not happen.

v2:
  Update the documentation suggested by Tony

Suggested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI, APEI, EINJ, new parameter to control trigger action
Chen Gong [Thu, 15 Mar 2012 08:53:36 +0000 (16:53 +0800)]
ACPI, APEI, EINJ, new parameter to control trigger action

Some APEI firmware implementation will access injected address
specified in param1 to trigger the error when injecting memory
error, which means if one SRAR error is injected, the crash
always happens because it is executed in kernel context. This
new parameter can disable trigger action and control is taken
over by the user. In this way, an SRAR error can happen in user
context instead of crashing the system. This function is highly
depended on BIOS implementation so please ensure you know the
BIOS trigger procedure before you enable this switch.

v2:
  notrigger should be created together with param1/param2

Tested-by: Tony Luck <tony.luck@lintel.com>
Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI, APEI, EINJ, limit the range of einj_param
Chen Gong [Sat, 3 Mar 2012 03:56:43 +0000 (11:56 +0800)]
ACPI, APEI, EINJ, limit the range of einj_param

On the platforms with ACPI4.x support, parameter extension
is not always doable, which means only parameter extension
is enabled, einj_param can take effect.

v2->v1: stopping early in einj_get_parameter_address for einj_param

Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI, APEI, Fix ERST header length check
Jiang Liu [Wed, 7 Mar 2012 14:15:06 +0000 (22:15 +0800)]
ACPI, APEI, Fix ERST header length check

This fixes a trivial copy & paste error in ERST header length check.
It's just for future safety because sizeof(struct acpi_table_einj)
equals to sizeof(struct acpi_table_erst) with current ACPI5.0
specification. It applies to v3.3-rc6.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agocpuidle: power_usage should be declared signed integer
Boris Ostrovsky [Tue, 13 Mar 2012 18:55:10 +0000 (19:55 +0100)]
cpuidle: power_usage should be declared signed integer

power_usage is always assigned a negative value and should be declared
a signed integer

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoidle, x86: Allow off-lined CPU to enter deeper C states
Boris Ostrovsky [Tue, 13 Mar 2012 18:55:09 +0000 (19:55 +0100)]
idle, x86: Allow off-lined CPU to enter deeper C states

Currently when a CPU is off-lined it enters either MWAIT-based idle or,
if MWAIT is not desired or supported, HLT-based idle (which places the
processor in C1 state). This patch allows processors without MWAIT
support to stay in states deeper than C1.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoMerge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh
Linus Torvalds [Fri, 30 Mar 2012 07:09:17 +0000 (00:09 -0700)]
Merge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh

Pull SuperH updates from Paul Mundt.

* tag 'sh-for-linus' of git://github.com/pmundt/linux-sh: (25 commits)
  sh: Support I/O space swapping where needed.
  sh: use set_current_blocked() and block_sigmask()
  sh: no need to reset handler if SA_ONESHOT
  sh: intc: Fix up section mismatch for intc_ack_data
  sh: select ARCH_DISCARD_MEMBLOCK.
  sh: Consolidate duplicate _32/_64 unistd definitions.
  sh: ecovec: switch SDHI controllers to card polling
  sh: Avoid exporting unimplemented syscalls.
  sh: add platform_device for RSPI in setup-sh7757
  SH: pci-sh7780: enable big-endian operation.
  serial: sh-sci: fix a race of DMA submit_tx on transfer
  sh: dma: Collect up CHCR of SH7763, SH7764, SH7780 and SH7785
  sh: dma: Collect up CHCR of SH7723 and SH7730
  sh/next: Fix build fail by asm/system.h in asm/bitops.h
  arch/sh/drivers/dma/{dma-g2,dmabrg}.c: ensure arguments to request_irq and free_irq are compatible
  sh: cpufreq: Wire up scaling_available_freqs support.
  sh: cpufreq: notify about rate rounding fallback.
  sh: cpufreq: Support CPU clock frequency table.
  sh: cpufreq: struct device lookup from CPU topology.
  sh: cpufreq: percpu struct clk accounting.
  ...

12 years agoACPI: Add CPU hotplug support for processor device objects
Toshi Kani [Mon, 19 Mar 2012 19:08:02 +0000 (13:08 -0600)]
ACPI: Add CPU hotplug support for processor device objects

acpi_processor_install_hotplug_notify() registers processor objects to
receive ACPI CPU hotplug event notifications. This patch additionally
registers processor device objects (ACPI0007) to receive the notifications
as well.

Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoMerge branch 'x86/urgent'
Ingo Molnar [Fri, 30 Mar 2012 06:50:47 +0000 (08:50 +0200)]
Merge branch 'x86/urgent'

12 years agox86: Remove the ancient and deprecated disable_hlt() and enable_hlt() facility
Len Brown [Thu, 29 Mar 2012 21:49:17 +0000 (14:49 -0700)]
x86: Remove the ancient and deprecated disable_hlt() and enable_hlt() facility

The X86_32-only disable_hlt/enable_hlt mechanism was used by the
32-bit floppy driver. Its effect was to replace the use of the
HLT instruction inside default_idle() with cpu_relax() - essentially
it turned off the use of HLT.

This workaround was commented in the code as:

 "disable hlt during certain critical i/o operations"

 "This halt magic was a workaround for ancient floppy DMA
  wreckage. It should be safe to remove."

H. Peter Anvin additionally adds:

 "To the best of my knowledge, no-hlt only existed because of
  flaky power distributions on 386/486 systems which were sold to
  run DOS.  Since DOS did no power management of any kind,
  including HLT, the power draw was fairly uniform; when exposed
  to the much hhigher noise levels you got when Linux used HLT
  caused some of these systems to fail.

  They were by far in the minority even back then."

Alan Cox further says:

 "Also for the Cyrix 5510 which tended to go castors up if a HLT
  occurred during a DMA cycle and on a few other boxes HLT during
  DMA tended to go astray.

  Do we care ? I doubt it. The 5510 was pretty obscure, the 5520
  fixed it, the 5530 is probably the oldest still in any kind of
  use."

So, let's finally drop this.

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Stephen Hemminger <shemminger@vyatta.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/n/tip-3rhk9bzf0x9rljkv488tloib@git.kernel.org
[ If anyone cares then alternative instruction patching could be
  used to replace HLT with a one-byte NOP instruction. Much simpler. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
12 years agoMerge branch 'linus' into x86/urgent
Ingo Molnar [Fri, 30 Mar 2012 06:47:19 +0000 (08:47 +0200)]
Merge branch 'linus' into x86/urgent

Merge reason: Needed for include file dependencies.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
12 years agoACPI / PM: print physical addresses consistently with other parts of kernel
Bjorn Helgaas [Tue, 14 Feb 2012 00:04:43 +0000 (17:04 -0700)]
ACPI / PM: print physical addresses consistently with other parts of kernel

Print physical address info in a style consistent with the %pR style used
elsewhere in the kernel.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: Evaluate thermal trip points before reading temperature
Matthew Garrett [Wed, 1 Feb 2012 15:26:54 +0000 (10:26 -0500)]
ACPI: Evaluate thermal trip points before reading temperature

An HP laptop (Pavilion G4-1016tx) has the following code in _TMP:

       Store (\_SB.PCI0.LPCB.EC0.RTMP, Local0)
       If (LGreaterEqual (Local0, S4TP))
       {
           Store (One, HTS4)
       }

S4TP is initialised at 0 and not programmed further until either _HOT or
_CRT is called. If we evaluate _TMP before the trip points then HTS4 will
always be set, causing the firmware to generate a message on boot
complaining that the system shut down because of overheating. The simplest
solution is just to reverse the checking of trip points and _TMP in thermal
init.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI, PCI: Move acpi_dev_run_wake() to ACPI core
Lin Ming [Tue, 27 Mar 2012 07:43:25 +0000 (15:43 +0800)]
ACPI, PCI: Move acpi_dev_run_wake() to ACPI core

acpi_dev_run_wake() is a generic function which can be used by
other subsystem too. Rename it to acpi_pm_device_run_wake, to be
consistent with acpi_pm_device_sleep_wake.

Then move it to ACPI core.

Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Fri, 30 Mar 2012 06:17:44 +0000 (23:17 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull 2nd round of input updates from Dmitry Torokhov:
 - update to Wacom driver to support wireless devices
 - update to Sentelci touchpad driver to support newer hardware
 - update to gpio-keys driver to support "interrupt-only" keys
 - fixups to earlier commits

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: wacom - check for allocation failure in probe()
  Input: tegra-kbc - allocate pdata before using it
  Input: amijoy - add missing platform check
  Input: wacom - wireless battery status
  Input: wacom - create inputs when wireless connect
  Input: wacom - wireless monitor framework
  Input: wacom - isolate input registration
  Input: sentelic - improve packet debugging information
  Input: sentelic - minor code cleanup
  Input: sentelic - enabling absolute coordinates output for newer hardware
  Input: sentelic - refactor code for upcoming new hardware support
  Input: gpio_keys - add support for interrupt only keys
  Input: gpio_keys - consolidate key destructor code
  Input: revert "gpio_keys - switch to using threaded IRQs"
  Input: gpio_keys - constify platform data
  Input: spear-keyboard - remove kbd_set_plat_data()

12 years agocpuidle: remove unused 'governor_data' field
Daniel Lezcano [Mon, 26 Mar 2012 12:51:28 +0000 (14:51 +0200)]
cpuidle: remove unused 'governor_data' field

As far as I can see, this field is never used in the code.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agocpuidle: remove useless array definition in cpuidle_structure
Daniel Lezcano [Mon, 26 Mar 2012 12:51:27 +0000 (14:51 +0200)]
cpuidle: remove useless array definition in cpuidle_structure

All the modules name are ro-data, it is never copied to the array.

eg.

static struct cpuidle_driver intel_idle_driver = {
        .name = "intel_idle",
        .owner = THIS_MODULE,
};

It safe to assign the pointer of this ro-data to a const char *.
By this way we save 12 bytes.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Tested-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agocpuidle: use the driver's state_count as default
Daniel Lezcano [Mon, 26 Mar 2012 12:51:26 +0000 (14:51 +0200)]
cpuidle: use the driver's state_count as default

If the state_count is not initialized for the device use
the driver's state count as the default. That will prevent
to add it manually in the cpuidle driver initialization
routine and will save us from duplicate line of code.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agocpuidle: add a sysfs entry to disable specific C state for debug purpose.
ShuoX Liu [Wed, 28 Mar 2012 22:19:11 +0000 (15:19 -0700)]
cpuidle: add a sysfs entry to disable specific C state for debug purpose.

Some C states of new CPU might be not good.  One reason is BIOS might
configure them incorrectly.  To help developers root cause it quickly, the
patch adds a new sysfs entry, so developers could disable specific C state
manually.

In addition, C state might have much impact on performance tuning, as it
takes much time to enter/exit C states, which might delay interrupt
processing.  With the new debug option, developers could check if a deep C
state could impact performance and how much impact it could cause.

Also add this option in Documentation/cpuidle/sysfs.txt.

[akpm@linux-foundation.org: check kstrtol return value]
Signed-off-by: ShuoX Liu <shuox.liu@intel.com>
Reviewed-by: Yanmin Zhang <yanmin_zhang@intel.com>
Reviewed-and-Tested-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: Add interface to register/unregister device to/from power resources
Lin Ming [Thu, 29 Mar 2012 06:09:39 +0000 (14:09 +0800)]
ACPI: Add interface to register/unregister device to/from power resources

Devices may share same list of power resources in _PR0, for example

Device(Dev0)
{
Name (_PR0, Package (0x01)
{
P0PR,
P1PR
})
}

Device(Dev1)
{
Name (_PR0, Package (0x01)
{
P0PR,
P1PR
}
}

Assume Dev0 and Dev1 were runtime suspended.
Then Dev0 is resumed first and it goes into D0 state.
But Dev1 is left in D0_Uninitialised state.

This is wrong. In this case, Dev1 must be resumed too.

In order to hand this case, each power resource maintains a list of
devices which relies on it.

When power resource is ON, it will check if the devices on its list
can be resumed. The device can only be resumed when all the power
resouces of its _PR0 are ON.

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: Introduce ACPI D3_COLD state support
Zhang Rui [Thu, 29 Mar 2012 06:09:38 +0000 (14:09 +0800)]
ACPI: Introduce ACPI D3_COLD state support

If a device has _PR3, it means the device supports D3_COLD.
Add the ability to validate and enter D3_COLD state in ACPI.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPICA: Update to version 20120320
Bob Moore [Wed, 21 Mar 2012 03:02:24 +0000 (11:02 +0800)]
ACPICA: Update to version 20120320

Version 20120320.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPICA: Object repair code: Support to add Package wrappers
Bob Moore [Wed, 21 Mar 2012 01:51:39 +0000 (09:51 +0800)]
ACPICA: Object repair code: Support to add Package wrappers

Repair a common problem with objects that are defined to return
a variable-length Package of sub-objects. If there is only one
sub-object, some BIOS code mistakenly simply declares the single
object instead of a Package with one sub-object.  This function
attempts to repair this error by wrapping a Package object around
the original object, creating the correct and expected Package
with one sub-object.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoInput: wacom - check for allocation failure in probe()
Dan Carpenter [Fri, 30 Mar 2012 05:38:11 +0000 (22:38 -0700)]
Input: wacom - check for allocation failure in probe()

We accidentally removed the check for NULL in 3aac0ef10b "Input: wacom -
isolate input registration".

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
12 years agoACPI: Make ACPI interrupt threaded
Andi Kleen [Mon, 6 Feb 2012 16:17:09 +0000 (08:17 -0800)]
ACPI: Make ACPI interrupt threaded

Some ACPI interrupt actions may need to wait, and it's easiest to
have a thread context for this. So turn the ACPI interrupt
into a threaded interrupt.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agoACPI: ec: Do request_region outside WARN()
Andi Kleen [Mon, 6 Feb 2012 16:17:08 +0000 (08:17 -0800)]
ACPI: ec: Do request_region outside WARN()

WARN() is not supposed to have side effects, so move the request_regions
outside.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
12 years agosparc: Fix even more fallout from system.h split.
David S. Miller [Fri, 30 Mar 2012 05:40:52 +0000 (22:40 -0700)]
sparc: Fix even more fallout from system.h split.

jump_label.c needs asm/cacheflush.h to get flushi().
kgdb_64.c needs asm/cacheflush.h to get flushw_all().

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosparc: fix fallout from system.h split
Stephen Rothwell [Fri, 30 Mar 2012 05:39:57 +0000 (22:39 -0700)]
sparc: fix fallout from system.h split

Fixes this build error:

kernel/signal.c: In function 'ptrace_stop':
kernel/signal.c:1860:3: error: implicit declaration of function 'synchronize_user_stack' [-Werror=implicit-function-declaration]

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>