21 Aug, 2010
1 commit
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Sysrq operations do not accept tty argument anymore so no need to pass
it to us.[Stephen Rothwell : fix build breakage in drm code
caused by sysrq using bool but not including linux/types.h][Sachin Sant : fix build breakage in s390 keyboadr
driver]Acked-by: Alan Cox
Acked-by: Jason Wessel
Acked-by: Greg Kroah-Hartman
Signed-off-by: Dmitry Torokhov
20 Aug, 2010
1 commit
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Noone is using tty argument so let's get rid of it.
Acked-by: Alan Cox
Acked-by: Jason Wessel
Acked-by: Greg Kroah-Hartman
Signed-off-by: Dmitry Torokhov
16 Aug, 2010
2 commits
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* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
gcc-4.6: ACPI: fix unused but set variables in ACPI
ACPI thermal: make procfs I/F depend on CONFIG_ACPI_PROCFS
ACPI video: make procfs I/F depend on CONFIG_ACPI_PROCFS
ACPI processor: remove deprecated ACPI procfs I/F
ACPI power_resource: remove unused procfs I/F
ACPI: remove deprecated ACPI procfs I/F
ACPI: introduce drivers/acpi/sysfs.c
ACPI: introduce module parameter acpi.aml_debug_output
ACPI: introduce drivers/acpi/debugfs.c
ACPI, APEI, ERST debug support
ACPI, APEI, Manage GHES as platform devices
ACPI, APEI, Rename CPER and GHES severity constants
ACPI, APEI, Fix a typo of error path of apei_resources_request
ACPI / ACPICA: Fix reference counting problems with GPE handlers
ACPI: Add the check of ADR flag in course of finding ACPI handle for PCI device
ACPI / Sleep: Drop acpi_suspend_finish()
ACPI / Sleep: Consolidate suspend and hibernation routines
ACPI / Wakeup: Simplify enabling of wakeup devices
ACPI / Sleep: Rework enabling wakeup devices
ACPI / Sleep: Free NVS copy if suspending of devices failsFixed up totally buggered "ACPI: fix unused but set variables in ACPI"
patch that doesn't even compile in the merge.Thanks to Sedat Dilek for noticing the
breakage before I even pulled. And a big "Grrr.." at Len for not even
bothering to compile the tree before asking me to pull. -
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: don't validate CROSS_COMPILE needlessly
arch/tile: export only COMMAND_LINE_SIZE to userspace.
arch/tile: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN
arch/tile: Rename the hweight() implementations to __arch_hweight()
arch/tile: extend syscall ABI to set r1 on return as well.
arch/tile: Various cleanups.
arch/tile: support backtracing on TILE-Gx
arch/tile: Fix a couple of issues with the COMPAT code for TILE-Gx.
arch/tile: Use separate, better minsec values for clocksource and sched_clock.
arch/tile: correct a bug in freeing bootmem by VA for the optional second initrd.
arch: tile: mm: pgtable.c: Removed duplicated #include
arch: tile: kernel/proc.c Removed duplicated #include
Add fanotify syscalls to .
arch/tile: support new kunmap_atomic() naming convention.
tile: remove unused ISA_DMA_THRESHOLD defineConflicts in arch/tile/configs/tile_defconfig (pick the mainline version
with the reduced defconfig).
15 Aug, 2010
10 commits
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Conflicts:
drivers/acpi/debug.cSigned-off-by: Len Brown
-
Remove deprecated ACPI processor procfs I/F, including:
/proc/acpi/processor/CPUX/power
/proc/acpi/processor/CPUX/limit
/proc/acpi/processor/CPUX/info/proc/acpi/processor/CPUX/throttling still exists,
as we don't have sysfs I/F available for now.Signed-off-by: Zhang Rui
Signed-off-by: Len Brown -
Introduce module parameter acpi.aml_debug_output.
With acpi.aml_debug_output set, we can get AML debug object output
(Store (AAA, Debug)), even with CONFIG_ACPI_DEBUG cleared.Together with the runtime custom method mechanism,
we can debug AML code problems without rebuilding the kernel.Signed-off-by: Zhang Rui
Signed-off-by: Len Brown -
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/cleanup:
defconfig reduction
kbuild: drop unifdef-y support
archs: replace unifdef-y with header-y
include: replace unifdef-y with header-y -
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: (22 commits)
hwmon: (via-cputemp) Remove bogus "SHOW" global variable
hwmon: jc42 depends on I2C
hwmon: (pc87427) Add a maintainer
hwmon: (pc87427) Move sysfs file removal to a separate function
hwmon: (pc87427) Add temperature monitoring support
hwmon: (pc87427) Add support for the second logical device
hwmon: (pc87427) Add support for manual fan speed control
hwmon: (pc87427) Minor style cleanups
hwmon: (pc87427) Handle disabled fan inputs properly
hwmon: (w83627ehf) Add support for W83667HG-B
hwmon: (w83627ehf) Driver cleanup
hwmon: Add driver for SMSC EMC2103 temperature monitor and fan controller
hwmon: Remove in[0-*]_fault from sysfs-interface
hwmon: Add 4 current alarm/beep attributes to sysfs-interface
hwmon: Add 3 critical limit attributes to sysfs-interface
hwmon: (asc7621) Clean up and improve detect function
hwmon: (it87) Export labels for internal sensors
hwmon: (lm75) Add suspend/resume feature
hwmon: (emc1403) Add power support
hwmon: (ltc4245) Expose all GPIO pins as analog voltages
... -
unifdef-y and header-y has same semantic.
So there is no need to have both.Drop the unifdef-y variant and sort all lines again
Signed-off-by: Sam Ravnborg
-
Add support for exposing all GPIO pins as analog voltages. Though this is
not an ideal use of the chip, some hardware engineers may decide that the
LTC4245 meets their design requirements when studying the datasheet.The GPIO pins are sampled in round-robin fashion, meaning that a slow
reader will see stale data. A userspace application can detect this,
because it will get -EAGAIN when reading from a sysfs file which contains
stale data.Users can choose to use this feature on a per-chip basis by using either
platform data or the OF device tree (where applicable).Signed-off-by: Ira W. Snyder
Signed-off-by: Jean Delvare -
* 'next-spi' of git://git.secretlab.ca/git/linux-2.6:
spi/amba_pl022: Fix probe and remove hook section annotations.
spi/mpc5121: change annotations for probe and remove functions
spi/bitbang: reinitialize transfer parameters for every message
spi/spi-gpio: add support for controllers without MISO or MOSI pin
spi/bitbang: add support for SPI_MASTER_NO_{TX, RX} modes
SPI100k: Fix 8-bit and RX-only transfers
spi/mmc_spi: mmc_spi adaptations for SPI bus locking API
spi/mmc_spi: SPI bus locking API, using mutexFix trivial conflict in drivers/spi/mpc512x_psc_spi.c due to 'struct
of_device' => 'struct platform_device' rename and __init/__exit to
__devinit/__devexit fix.
14 Aug, 2010
6 commits
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* 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing:
bkl: Remove locked .ioctl file operation
v4l: Remove reference to bkl ioctl in compat ioctl handling
logfs: kill BKL -
Mark arguments to certain system calls as being const where they should be but
aren't. The list includes:(*) The filename arguments of various stat syscalls, execve(), various utimes
syscalls and some mount syscalls.(*) The filename arguments of some syscall helpers relating to the above.
(*) The buffer argument of various write syscalls.
Signed-off-by: David Howells
Acked-by: David S. Miller
Signed-off-by: Linus Torvalds -
The last user is gone, so we can safely remove this
Signed-off-by: Arnd Bergmann
Cc: John Kacur
Cc: Al Viro
Cc: Thomas Gleixner
Signed-off-by: Frederic Weisbecker -
commit 4565f0170dfc849b3629c27d769db800467baa62 "dma-mapping: unify
dma_get_cache_alignment implementations" causes build errors on
!HAS_DMA architectures/platforms like s390 and sun3:include/linux/dma-mapping.h:145: error: static declaration of 'dma_get_cache_alignment' follows non-static declaration
include/asm-generic/dma-mapping-broken.h:73: error: previous declaration of 'dma_get_cache_alignment' was hereFix this by adding an explicit ifdef.
Cc: Geert Uytterhoeven
Acked-by: FUJITA Tomonori
Signed-off-by: Heiko Carstens
Signed-off-by: Linus Torvalds -
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (30 commits)
ctcm: rename READ/WRITE defines to avoid redefinitions
claw: rename READ/WRITE defines to avoid redefinitions
phylib: available for any speed ethernet
can: add limit for nframes and clean up signed/unsigned variables
pkt_sched: Check .walk and .leaf class handlers
pkt_sched: Fix sch_sfq vs tc_modify_qdisc oops
caif-spi: Bugfix SPI_DATA_POS settings were inverted.
caif: Bugfix - Increase default headroom size for control channel.
net: make netpoll_rx return bool for !CONFIG_NETPOLL
Bluetooth: Use 3-DH5 payload size for default ERTM max PDU size
Bluetooth: Fix incorrect setting of remote_tx_win for L2CAP ERTM
Bluetooth: Change default L2CAP ERTM retransmit timeout
Bluetooth: Fix endianness issue with L2CAP MPS configuration
net: Use NET_XMIT_SUCCESS where possible.
isdn: mISDN: call pci_disable_device() if pci_probe() failed
isdn: avm: call pci_disable_device() if pci_probe() failed
isdn: avm: call pci_disable_device() if pci_probe() failed
usbnet: rx_submit() should return an error code.
pkt_sched: Add some basic qdisc class ops verification. Was: [PATCH] sfq: add dummy bind/unbind handles
pkt_sched: sch_sfq: Add dummy unbind_tcf and put handles. Was: [PATCH] sfq: add dummy bind/unbind handles
...
13 Aug, 2010
15 commits
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Signed-off-by: Chris Metcalf
Signed-off-by: Andrew Morton
Acked-by: Arnd Bergmann
Cc: Eric Paris -
This reverts commit 3bcf3860a4ff9bbc522820b4b765e65e4deceb3e (and the
accompanying commit c1e5c954020e "vfs/fsnotify: fsnotify_close can delay
the final work in fput" that was a horribly ugly hack to make it work at
all).The 'struct file' approach not only causes that disgusting hack, it
somehow breaks pulseaudio, probably due to some other subtlety with
f_count handling.Fix up various conflicts due to later fsnotify work.
Signed-off-by: Linus Torvalds
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* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (33 commits)
dm mpath: support discard
dm stripe: support discards
dm: split discard requests on target boundaries
dm stripe: optimize sector division
dm stripe: move sector translation to a function
dm: error return error for discards
dm delay: support discard
dm: zero silently drop discards
dm: use dm_target_offset macro
dm: factor out max_io_len_target_boundary
dm: use common __issue_target_request for flush and discard support
dm: linear support discard
dm crypt: simplify crypt_ctr
dm crypt: simplify crypt_config destruction logic
dm: allow autoloading of dm mod
dm: rename map_info flush_request to target_request_nr
dm ioctl: refactor dm_table_complete
dm snapshot: implement merge
dm: do not initialise full request queue when bio based
dm ioctl: make bio or request based device type immutable
... -
* 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6:
hugetlb: add missing unlock in avoidcopy path in hugetlb_cow()
hwpoison: rename CONFIG
HWPOISON, hugetlb: support hwpoison injection for hugepage
HWPOISON, hugetlb: detect hwpoison in hugetlb code
HWPOISON, hugetlb: isolate corrupted hugepage
HWPOISON, hugetlb: maintain mce_bad_pages in handling hugepage error
HWPOISON, hugetlb: set/clear PG_hwpoison bits on hugepage
HWPOISON, hugetlb: enable error handling path for hugepage
hugetlb, rmap: add reverse mapping for hugepage
hugetlb: move definition of is_vm_hugetlb_page() to hugepage_inline.hFix up trivial conflicts in mm/memory-failure.c
-
* 'for-linus' of git://neil.brown.name/md:
Further tidyup of raid6 naming in lib/raid6
Make lib/raid6/test build correctly.
Rename raid6 files now they're in a 'raid6' directory. -
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c: I2C bus multiplexer driver pca954x
i2c: Multiplexed I2C bus core support
i2c: Use a separate mutex for userspace client lists
i2c: Make i2c_default_probe self-sufficient
i2c: Drop dummy variable
i2c: Move adapter locking helpers to i2c-core
V4L/DVB: Use custom I2C probing function mechanism
i2c: Add support for custom probe function
i2c-dev: Use memdup_user
i2c-dev: Remove unnecessary kmalloc casts -
* 'params' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (22 commits)
param: don't deref arg in __same_type() checks
param: update drivers/acpi/debug.c to new scheme
param: use module_param in drivers/message/fusion/mptbase.c
ide: use module_param_named rather than module_param_call
param: update drivers/char/ipmi/ipmi_watchdog.c to new scheme
param: lock if_sdio's lbs_helper_name and lbs_fw_name against sysfs changes.
param: lock myri10ge_fw_name against sysfs changes.
param: simple locking for sysfs-writable charp parameters
param: remove unnecessary writable charp
param: add kerneldoc to moduleparam.h
param: locking for kernel parameters
param: make param sections const.
param: use free hook for charp (fix leak of charp parameters)
param: add a free hook to kernel_param_ops.
param: silence .init.text references from param ops
Add param ops struct for hvc_iucv driver.
nfs: update for module_param_named API change
AppArmor: update for module_param_named API change
param: use ops in struct kernel_param, rather than get and set fns directly
param: move the EXPORT_SYMBOL to after the definitions.
... -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (22 commits)
regulator: Remove default DEBUG define from TPS6586x
regulator: tps6507x - add missing platform_set_drvdata in tps6507x_pmic_probe
regulator: tps6586x - add regulator_unregister() in tps6586x_regulator_remove()
mfd: max8998 - fix incorrect kfree(i2c) in i2c_driver probe callback handler
regulator: lp3971 - remove unnecessary ret value checking in lp3971_i2c_write()
regulator: max8660 - fix a memory leak in max8660_remove()
regulator: max1586 - fix a memory leak in max1586_pmic_remove()
regulator: Default GPIO controlled WM8994 regulators to disabled
regulator: lp3971 - remove unnecessary ret value checking in lp3971_i2c_write()
max8998: fix off-by-one value range checking
regulator: tps6586x: fix millivolt return values and SM2 table
regulator: tps6586x: add dependancy on MFD_TPS6585x
regulator: add TPS6586X regulator driver
regulator: MAX8998: set_voltage bugfix. ramp_up delay and min/max voltage
regulator: add support for regulators on the ab8500 MFD
ab8500-mfd: add regulator support to ab8500 mfd device
tps65023: Allow registering similar TPS65021
drivers: regulators: depend on MFD_MAX8998
drivers: regulator: add Maxim 8998 driver
ISL6271A voltage regulator support.
... -
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (40 commits)
mfd: Fix incorrect kfree(i2c) in wm8994-core i2c_driver probe
mfd: Fix incorrect kfree(i2c) in wm831x-core i2c_driver probe
mfd: Fix incorrect kfree(i2c) in tps6507x i2c_driver probe
mfd: Add TPS6586x driver
mfd: Use macros instead of some constant magic numbers for menelaus
mfd: Fix menelaus mmc slot 2 misconfiguration
mfd: Missing slab.h includes
mfd: Fix wrong wm8350-core kfree in error path
mfd: Fix wm8994_device_init() return value
mfd: Avoid calling platform_device_put() twice in ucb1400 probe error path
mfd: Annotate tc6387xb probe/remove routines with __devinit/__devexit
mfd: Fix tc6387xb resource reclaim
mfd: Fix wrong goto labels for tc6393xb error handling
mfd: Get rid of now unused mc13783 private header
hwmon: Don't access struct mc13783 directly from mc13783-adc
mfd: New mc13783 function exposing flags
mfd: Check jz4740-adc kmalloc() result
mfd: Fix jz4740-adc resource reclaim in probe error path
mfd: Add WM8321 support
mfd: Add stmpe auto sleep feature
... -
* git://git.infradead.org/battery-2.6:
intel_mid_battery: Fix battery scaling
intel_mid_battery: Fix the argument order to intel_scu_ipc_command
olpc_battery: Fix build failure caused by sysfs changes
Add s3c-adc-battery driver
Intel MID platform battery driverFix up trivial conflicts (battery drivers added from different branches)
in drivers/power/{Kconfig,Makefile} -
The current computation, introduced with f12a15be63, of FSEC_PER_SEC using
the multiplication of (FSEC_PER_NSEC * NSEC_PER_SEC) is performed only
with 32bit integers on small machines, resulting in an overflow and a
*very* short intervals being programmed. An interrupt storm follows.Note that we also have to specify FSEC_PER_SEC as being long long to
overcome the same limitations.Signed-off-by: Chris Wilson
Signed-off-by: John Stultz
Cc: Thomas Gleixner
Acked-by: Ingo Molnar
Acked-by: H. Peter Anvin
Signed-off-by: Linus Torvalds -
Add a dummy printk function for the maintenance of unused printks through gcc
format checking, and also so that side-effect checking is maintained too.Signed-off-by: David Howells
Signed-off-by: Linus Torvalds -
* 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (55 commits)
io-mapping: move asm include inside the config option
vgaarb: drop vga.h include
drm/radeon: Add probing of clocks from device-tree
drm/radeon: drop old and broken mesa warning
drm/radeon: Fix pci_map_page() error checking
drm: Remove count_lock for calling lastclose() after 58474713 (v2)
drm/radeon/kms: allow FG_ALPHA_VALUE on r5xx
drm/radeon/kms: another r6xx/r7xx CS checker fix
DRM: Replace kmalloc/memset combos with kzalloc
drm: expand gamma_set
drm/edid: Split mode lists out to their own header for readability
drm/edid: Rewrite mode parse to use the generic detailed block walk
drm/edid: Add detailed block walk for VTB extensions
drm/edid: Add detailed block walk for CEA extensions
drm: Remove unused fields from drm_display_info
drm: Use ENOENT consistently for the error return for an unmatched handle.
drm/radeon/kms: mark 3D power states as performance
drm: Only set DPMS once on the CRTC not after every encoder.
drm/radeon/kms: add additional quirk for Acer rv620 laptop
drm: Propagate error code from fb_create()
...Fix up trivial conflicts in drivers/gpu/drm/drm_edid.c
-
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6:
mmc_spi: Fix unterminated of_match_table
of/sparc: fix build regression from of_device changes
of/device: Replace struct of_device with struct platform_device -
* 'stable/xen-swiotlb-0.8.6' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
x86: Detect whether we should use Xen SWIOTLB.
pci-swiotlb-xen: Add glue code to setup dma_ops utilizing xen_swiotlb_* functions.
swiotlb-xen: SWIOTLB library for Xen PV guest with PCI passthrough.
xen/mmu: inhibit vmap aliases rather than trying to clear them out
vmap: add flag to allow lazy unmap to be disabled at runtime
xen: Add xen_create_contiguous_region
xen: Rename the balloon lock
xen: Allow unprivileged Xen domains to create iomap pages
xen: use _PAGE_IOMAP in ioremap to do machine mappingsFix up trivial conflicts (adding both xen swiotlb and xen pci platform
driver setup close to each other) in drivers/xen/{Kconfig,Makefile} and
include/xen/xen-ops.h
12 Aug, 2010
5 commits
-
Secure discard is the same as discard except that all copies of the
discarded sectors (perhaps created by garbage collection) must also be
erased.Signed-off-by: Adrian Hunter
Acked-by: Jens Axboe
Cc: Kyungmin Park
Cc: Madhusudhan Chikkature
Cc: Christoph Hellwig
Cc: Ben Gardiner
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
SD/MMC cards tend to support an erase operation. In addition, eMMC v4.4
cards can support secure erase, trim and secure trim operations that are
all variants of the basic erase command.SD/MMC device attributes "erase_size" and "preferred_erase_size" have been
added."erase_size" is the minimum size, in bytes, of an erase operation. For
MMC, "erase_size" is the erase group size reported by the card. Note that
"erase_size" does not apply to trim or secure trim operations where the
minimum size is always one 512 byte sector. For SD, "erase_size" is 512
if the card is block-addressed, 0 otherwise.SD/MMC cards can erase an arbitrarily large area up to and
including the whole card. When erasing a large area it may
be desirable to do it in smaller chunks for three reasons:1. A single erase command will make all other I/O on the card
wait. This is not a problem if the whole card is being erased, but
erasing one partition will make I/O for another partition on the
same card wait for the duration of the erase - which could be a
several minutes.2. To be able to inform the user of erase progress.
3. The erase timeout becomes too large to be very useful.
Because the erase timeout contains a margin which is multiplied by
the size of the erase area, the value can end up being several
minutes for large areas."erase_size" is not the most efficient unit to erase (especially for SD
where it is just one sector), hence "preferred_erase_size" provides a good
chunk size for erasing large areas.For MMC, "preferred_erase_size" is the high-capacity erase size if a card
specifies one, otherwise it is based on the capacity of the card.For SD, "preferred_erase_size" is the allocation unit size specified by
the card."preferred_erase_size" is in bytes.
Signed-off-by: Adrian Hunter
Acked-by: Jens Axboe
Cc: Kyungmin Park
Cc: Madhusudhan Chikkature
Cc: Christoph Hellwig
Cc: Ben Gardiner
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit 83ba7b071f3 ("writeback: simplify the write back thread queue")
broke writeback_in_progress() as in that commit we started to remove work
items from the list at the moment we start working on them and not at the
moment they are finished. Thus if the flusher thread was doing some work
but there was no other work queued, writeback_in_progress() returned
false. This could in particular cause unnecessary queueing of background
writeback from balance_dirty_pages() or writeout work from
writeback_sb_if_idle().This patch fixes the problem by introducing a bit in the bdi state which
indicates that the flusher thread is processing some work and uses this
bit for writeback_in_progress() test.NOTE: Both callsites of writeback_in_progress() (namely,
writeback_inodes_sb_if_idle() and balance_dirty_pages()) would actually
need a different information than what writeback_in_progress() provides.
They would need to know whether *the kind of writeback they are going to
submit* is already queued. But this information isn't that simple to
provide so let's fix writeback_in_progress() for the time being.Signed-off-by: Jan Kara
Cc: Christoph Hellwig
Cc: Wu Fengguang
Acked-by: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Split get_dirty_limits() into global_dirty_limits()+bdi_dirty_limit(), so
that the latter can be avoided when under global dirty background
threshold (which is the normal state for most systems).Signed-off-by: Wu Fengguang
Cc: Peter Zijlstra
Cc: Christoph Hellwig
Cc: Dave Chinner
Cc: Jens Axboe
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The ACPI_PREEMPTION_POINT() logic was introduced in commit 8bd108d
(ACPICA: add preemption point after each opcode parse). The follow up
commits abe1dfab6, 138d15692, c084ca70 tried to fix the preemption logic
back and forth, but nobody noticed that the usage of
in_atomic_preempt_off() in that context is wrong.The check which guards the call of cond_resched() is:
if (!in_atomic_preempt_off() && !irqs_disabled())
in_atomic_preempt_off() is not intended for general use as the comment
above the macro definition clearly says:* Check whether we were atomic before we did preempt_disable():
* (used by the scheduler, *after* releasing the kernel lock)On a CONFIG_PREEMPT=n kernel the usage of in_atomic_preempt_off() works by
accident, but with CONFIG_PREEMPT=y it's just broken.The whole purpose of the ACPI_PREEMPTION_POINT() is to reduce the latency
on a CONFIG_PREEMPT=n kernel, so make ACPI_PREEMPTION_POINT() depend on
CONFIG_PREEMPT=n and remove the in_atomic_preempt_off() check.Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16210
[akpm@linux-foundation.org: fix build]
Signed-off-by: Thomas Gleixner
Cc: Len Brown
Cc: Francois Valenduc
Cc: Lin Ming
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
