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* 'for-38-rc3' of git://codeaurora.org/quic/kernel/davidb/linux-msm:
drivers: mmc: msm: remove clock disable in probe
mmc: msm: fix dma usage not to use internal APIs
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git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon/kms: add new radeon_info ioctl query for clock crystal freq
drm/i915: Prevent uninitialised reads during error state capture
drm/i915: Use consistent mappings for OpRegion between ACPI and i915
drm/i915: Handle the no-interrupts case for UMS by polling
drm/i915: Disable high-precision vblank timestamping for UMS
drm/i915: Increase the amount of defense before computing vblank timestamps
drm/i915,agp/intel: Do not clear stolen entries
drm/radeon/kms: simplify atom adjust pll setup
drm/radeon/kms: match r6xx/r7xx/evergreen asic_reset with previous asics
drm/radeon/kms: make the mac rv630 quirk generic
drm/radeon/kms: fix a spelling error in an error message
drm/radeon/kms: Initialize pageflip spinlocks.
drm/i915: Recognise non-VGA display devices
drm/i915: Fix use of invalid array size for ring->sync_seqno
drm/i915/ringbuffer: Fix use of stale HEAD position whilst polling for space
drm/i915: Don't kick-off hangcheck after a DRI interrupt
drm/i915: Add dependency on CONFIG_TMPFS
drm/i915: Initialise ring vfuncs for old DRI paths
drm/i915: make the blitter report buffer modifications to the FBC unit
drm/i915: set more FBC chicken bits
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ssh://master.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel into drm-fixes
* 'drm-intel-fixes-2' of ssh://master.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel: (30 commits)
drm/i915: Prevent uninitialised reads during error state capture
drm/i915: Use consistent mappings for OpRegion between ACPI and i915
drm/i915: Handle the no-interrupts case for UMS by polling
drm/i915: Disable high-precision vblank timestamping for UMS
drm/i915: Increase the amount of defense before computing vblank timestamps
drm/i915,agp/intel: Do not clear stolen entries
Remove MAYBE_BUILD_BUG_ON
BUILD_BUG_ON: make it handle more cases
module: fix missing semicolons in MODULE macro usage
param: add null statement to compiled-in module params
module: fix linker error for MODULE_VERSION when !MODULE and CONFIG_SYSFS=n
module: show version information for built-in modules in sysfs
selinux: return -ENOMEM when memory allocation fails
tpm: fix panic caused by "tpm: Autodetect itpm devices"
TPM: Long default timeout fix
trusted keys: Fix a memory leak in trusted_update().
keys: add trusted and encrypted maintainers
encrypted-keys: rename encrypted_defined files to encrypted
trusted-keys: rename trusted_defined files to trusted
drm/i915: Recognise non-VGA display devices
...
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Needed for timer queries in the 3D driver.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
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Fix a shutdown regression caused by 2a2d31c8dc6f ("intel_idle: open
broadcast clock event"). The clockevent framework can automatically
shutdown broadcast timers for hotremove CPUs. And we get a shutdown
regression when we shutdown broadcast timer for hot remove CPU, so just
delete some code.
Also fix some section mismatch.
Reported-by: Ari Savolainen <ari.m.savolainen@gmail.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
RTC: Remove Kconfig symbol for UIE emulation
RTC: Properly handle rtc_read_alarm error propagation and fix bug
RTC: Propagate error handling via rtc_timer_enqueue properly
acpi_pm: Clear pmtmr_ioport if acpi_pm initialization fails
rtc: Cleanup removed UIE emulation declaration
hrtimers: Notify hrtimer users of switches to NOHZ mode
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error_bo and pinned_bo could be used uninitialised if there were no
active buffers.
Caught by kmemcheck.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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The opregion is a shared memory region between ACPI and the graphics
driver. As the ACPI mapping has been changed to cachable in commit
6d5bbf00d251cc73223a71422d69e069dc2e0b8d, mapping the intel opregion
non-cachable now fails. As no bus-master hardware is involved in the
opregion, cachable map should do no harm.
Tested on a Fujitsu Lifebook P8010.
Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
[ickle: convert to acpi_os_ioremap for consistency]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Merge with Linus to resolve conflicting fixes for the reusing the stale
HEAD value during intel_ring_wait().
Conflicts:
drivers/gpu/drm/i915/intel_ringbuffer.c
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If the driver calls into the kernel to wait for a breadcrumb to pass,
but hasn't enabled interrupts, fallback to polling the breadcrumb value.
Reported-by: Chris Clayton <chris2553@googlemail.com>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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We only have sufficient information for accurate (sub-frame) timestamping
when the modesetting is under our control.
Reported-by: Chris Clayton <chris2553@googlemail.com>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Reviewed-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Reported-by: Chris Clayton <chris2553@googlemail.com>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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We can only utilize the stolen portion of the GTT if we are in sole
charge of the hardware. This is only true if using GEM and KMS,
otherwise VESA continues to access stolen memory.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Frederic Weisbecker <fweisbec@gmail.com>
Tested-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
module: fix missing semicolons in MODULE macro usage
param: add null statement to compiled-in module params
module: fix linker error for MODULE_VERSION when !MODULE and CONFIG_SYSFS=n
module: show version information for built-in modules in sysfs
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git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
selinux: return -ENOMEM when memory allocation fails
tpm: fix panic caused by "tpm: Autodetect itpm devices"
TPM: Long default timeout fix
trusted keys: Fix a memory leak in trusted_update().
keys: add trusted and encrypted maintainers
encrypted-keys: rename encrypted_defined files to encrypted
trusted-keys: rename trusted_defined files to trusted
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You always needed them when you were a module, but the builtin versions
of the macros used to be more lenient.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
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Don't reset if the engine isn't busy. This matches the behavior of
previous asics. Reseting a non-hung block can lead to a hang.
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=33272
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
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Seems some other boards do this as well.
Reported-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@gmail.com>
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Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
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I'm amazed but not really surprised this worked on x86...
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
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commit 3f0d3d016d89a5efb8b926d4707eb21fa13f3d27 adds a check for
PNP device id to the common tpm_tis_init() function, which in some
cases (force=1) will be called without the device being a member of
a pnp_dev. Oopsing and panics ensue.
Move the test up to before the call to tpm_tis_init(), since it
just modifies a global variable anyway.
Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
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If duration variable value is 0 at this point, it's because
chip->vendor.duration wasn't filled by tpm_get_timeouts() yet.
This patch sets then the lowest timeout just to give enough
time for tpm_get_timeouts() to further succeed.
This fix avoids long boot times in case another entity attempts
to send commands to the TPM when the TPM isn't accessible.
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
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Starting with SandyBridge (though possible with earlier hacked BIOSes),
the BIOS may initialise the IGFX as secondary to a discrete GPU. Prior,
it would simply disable the integrated GPU. So we adjust our PCI class
mask to match any DISPLAY_CLASS device.
In such a configuration, the IGFX is not a primary VGA controller and
so should not take part in VGA arbitration, and the error return from
vga_client_register() is expected.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
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There are I915_NUM_RINGS-1 inter-ring synchronisation counters, but we
were clearing I915_NUM_RINGS of them. Oops.
Reported-by: Jiri Slaby <jirislaby@gmail.com>
Tested-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Fix new rapidio kernel-doc warnings:
Warning(drivers/rapidio/rio-scan.c:953): No description found for parameter 'prev'
Warning(drivers/rapidio/rio-scan.c:953): No description found for parameter 'prev_port'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The probe function adds the MMC host which can start accepting request
immediately. There is an assumption here that no requests happen
immediatly, but it's not always the case. This assumption can causes
a BUG() when the clocks are disabled. The fix is to just remove the
clock disable in the probe function.
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
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Remove parts of this driver which use internal API calls. This
replaces the calls as suggested by Russell King.
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
* 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (101 commits)
[media] staging/lirc: fix mem leaks and ptr err usage
[media] hdpvr: reduce latency of i2c read/write w/recycled buffer
[media] hdpvr: enable IR part
[media] rc/mceusb: timeout should be in ns, not us
[media] v4l2-device: fix 'use-after-freed' oops
[media] v4l2-dev: don't memset video_device.dev
[media] zoran: use video_device_alloc instead of kmalloc
[media] w9966: zero device state after a detach
[media] v4l: Fix a use-before-set in the control framework
[media] v4l: Include linux/videodev2.h in media/v4l2-ctrls.h
[media] DocBook/v4l: update V4L2 revision and update copyright years
[media] DocBook/v4l: fix validation error in dev-rds.xml
[media] v4l2-ctrls: queryctrl shouldn't attempt to replace V4L2_CID_PRIVATE_BASE IDs
[media] v4l2-ctrls: fix missing 'read-only' check
[media] pvrusb2: Provide more information about IR units to lirc_zilog and ir-kbd-i2c
[media] ir-kbd-i2c: Add back defaults setting for Zilog Z8's at addr 0x71
[media] lirc_zilog: Update TODO.lirc_zilog
[media] lirc_zilog: Add Andy Walls to copyright notice and authors list
[media] lirc_zilog: Remove useless struct i2c_driver.command function
[media] lirc_zilog: Remove unneeded tests for existence of the IR Tx function
...
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: core: fix unstable I/O with Canon camcorder
* 'fwnet' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: net: is not experimental anymore
firewire: net: invalidate ARP entries of removed nodes
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (34 commits)
powerpc/mpic: Fix mask/unmask timeout message
powerpc/pseries: Add BNX2=m to defconfig
powerpc: Enable 64kB pages and 1024 threads in pseries config
powerpc: Disable mcount tracers in pseries defconfig
powerpc/boot/dts: Install dts from the right directory
powerpc: machine_check_generic is wrong on 64bit
powerpc: Check RTAS extended log flag before checking length
powerpc: Fix corruption when grabbing FWNMI data
powerpc: Rework pseries machine check handler
powerpc: Don't silently handle machine checks from userspace
powerpc: Remove duplicate debugger hook in machine_check_exception
powerpc: Never halt RTAS error logging after receiving an unrecoverable machine check
powerpc: Don't force MSR_RI in machine_check_exception
powerpc: Print 32 bits of DSISR in show_regs
powerpc/kdump: Disable ftrace during kexec
powerpc/kdump: Move crash_kexec_stop_spus to kdump crash handler
powerpc/kexec: Remove empty ppc_md.machine_kexec_prepare
powerpc/kexec: Don't initialise kexec hooks to default handlers
powerpc/kdump: Remove ppc_md.machine_crash_shutdown
powerpc/kexec: Remove ppc_md.machine_kexec
...
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The effect of changing the value of this symbol is gone since 042620a
(RTC: Remove UIE emulation).
Remove symbol too.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
LKML-Reference: <1295625406-15340-1-git-send-email-u.kleine-koenig@pengutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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In reviewing cases where the virtualized interfaces didn't propagate
errors properly, I noticed rtc_read_alarm needed fixing. In doing
so I noticed my RTC rework dropped a memset and that the behavior
of rtc_read_alarm shouldn't be conditionalized on the alarm.enabled
flag (as the alarm may be set, but the irqs may be disabled). So
those were corrected as well.
CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
LKML-Reference: <1295565973-14358-2-git-send-email-john.stultz@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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In cases where RTC hardware does not support alarms, the virtualized
RTC interfaces did not have a way to propagate the error up to userland.
This patch extends rtc_timer_enqueue so it catches errors from the hardware
and returns them upwards to the virtualized interfaces. To simplify error
handling, it also internalizes the management of the timer->enabled bit
into rtc_timer_enqueue and rtc_timer_remove.
Also makes rtc_timer_enqueue and rtc_timer_remove static.
Reported-by: David Daney <ddaney@caviumnetworks.com>
Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diagnosed-by: David Daney <ddaney@caviumnetworks.com>
Tested-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
LKML-Reference: <1295565973-14358-1-git-send-email-john.stultz@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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If the acpi pm timer throws invalid data, clear pmtmr_ioport
so the pm timer won't accidentally be used.
This was found when using Xen where there is a acpi pm reported,
but gives bogus values, and other code was continuing to try
to use the pm timer after the initialization failed.
[jstultz: Catch additional failure and reword changelog message. ]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <1295027246-11110-1-git-send-email-johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Fix error test in fan_{read,write}_reg()
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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It turns out that some device drivers map pages from the ACPI NVS region
during resume using ioremap(), which conflicts with ioremap_cache() used
for mapping those pages by the NVS save/restore code in nvs.c.
Make the NVS pages mapped by the code in nvs.c be unmapped before device
drivers' resume routines run.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit ca9b600be38c ("ACPI / PM: Make suspend_nvs_save() use
acpi_os_map_memory()") attempted to prevent the code in osl.c and nvs.c
from using different ioremap() variants by making the latter use
acpi_os_map_memory() for mapping the NVS pages. However, that also
requires acpi_os_unmap_memory() to be used for unmapping them, which
causes synchronize_rcu() to be executed many times in a row
unnecessarily and introduces substantial delays during resume on some
systems.
Instead of using acpi_os_map_memory() for mapping the NVS pages in nvs.c
introduce acpi_os_ioremap() calling ioremap_cache() and make the code in
both osl.c and nvs.c use it.
Reported-by: Jeff Chua <jeff.chua.linux@gmail.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* akpm:
kernel/smp.c: consolidate writes in smp_call_function_interrupt()
kernel/smp.c: fix smp_call_function_many() SMP race
memcg: correctly order reading PCG_USED and pc->mem_cgroup
backlight: fix 88pm860x_bl macro collision
drivers/leds/ledtrig-gpio.c: make output match input, tighten input checking
MAINTAINERS: update Atmel AT91 entry
mm: fix truncate_setsize() comment
memcg: fix rmdir, force_empty with THP
memcg: fix LRU accounting with THP
memcg: fix USED bit handling at uncharge in THP
memcg: modify accounting function for supporting THP better
fs/direct-io.c: don't try to allocate more than BIO_MAX_PAGES in a bio
mm: compaction: prevent division-by-zero during user-requested compaction
mm/vmscan.c: remove duplicate include of compaction.h
memblock: fix memblock_is_region_memory()
thp: keep highpte mapped until it is no longer needed
kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT
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Fix collision with kernel-supplied #define:
drivers/video/backlight/88pm860x_bl.c:24:1: warning: "CURRENT_MASK" redefined
arch/x86/include/asm/page_64_types.h:6:1: warning: this is the location of the previous definition
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Haojian Zhuang <haojian.zhuang@marvell.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Replicate changes made to drivers/leds/ledtrig-backlight.c.
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
is used to configure any non-standard kernel with a much larger scope than
only small devices.
This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
references to the option throughout the kernel. A new CONFIG_EMBEDDED
option is added that automatically selects CONFIG_EXPERT when enabled and
can be used in the future to isolate options that should only be
considered for embedded systems (RISC architectures, SLOB, etc).
Calling the option "EXPERT" more accurately represents its intention: only
expert users who understand the impact of the configuration changes they
are making should enable it.
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: David Woodhouse <david.woodhouse@intel.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Greg KH <gregkh@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Robin Holt <holt@sgi.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
tty: update MAINTAINERS file due to driver movement
tty: move drivers/serial/ to drivers/tty/serial/
tty: move hvc drivers to drivers/tty/hvc/
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git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen
* 'xen/xenbus' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
xenbus: Fix memory leak on release
xenbus: avoid zero returns from read()
xenbus: add missing wakeup in concurrent read/write
xenbus: allow any xenbus command over /proc/xen/xenbus
xenfs/xenbus: report partial reads/writes correctly
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* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
virtio: remove virtio-pci root device
LGUEST_GUEST: fix unmet direct dependencies (VIRTUALIZATION && VIRTIO)
lguest: compile fixes
lguest: Use this_cpu_ops
lguest: document --rng in example Launcher
lguest: example launcher to use guard pages, drop PROT_EXEC, fix limit logic
lguest: --username and --chroot options
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git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
ACPICA: Update version to 20110112
ACPICA: Update all ACPICA copyrights and signons to 2011
ACPICA: Fix issues/fault with automatic "serialized" method support
ACPICA: Debugger: Lock namespace for duration of a namespace dump
ACPICA: Fix namespace race condition
ACPICA: Fix memory leak in acpi_ev_asynch_execute_gpe_method().
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During system suspend, the "wait for ring buffer to empty" loop would
always time out after three seconds, because the faster cached ring
buffer head read would always return zero. Force the slow-and-careful
PIO read on all but the first iterations of the loop to fix it.
This also removes the unused (and useless) 'actual_head' variable that
tried to approximate doing this, but did it incorrectly.
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Dave Airlie <airlied@linux.ie>
Cc: DRI mailing list <dri-devel@lists.freedesktop.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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thanks to Clemens' and Maxim's fixes to firewire-ohci and -net in the
last two kernel releases.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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This makes it possible to resume communication with a node that dropped
off the bus for a brief period. Otherwise communication will only be
possible after ARP cache entry timeouts.
Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (rebased)
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Regression since commit 10389536742c, "firewire: core: check for 1394a
compliant IRM, fix inaccessibility of Sony camcorder":
The camcorder Canon MV5i generates lots of bus resets when asynchronous
requests are sent to it (e.g. Config ROM read requests or FCP Command
write requests) if the camcorder is not root node. This causes drop-
outs in videos or makes the camcorder entirely inaccessible.
https://bugzilla.redhat.com/show_bug.cgi?id=633260
Fix this by allowing any Canon device, even if it is a pre-1394a IRM
like MV5i are, to remain root node (if it is at least Cycle Master
capable). With the FireWire controller cards that I tested, MV5i always
becomes root node when plugged in and left to its own devices.
Reported-by: Ralf Lange
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: <stable@kernel.org> # 2.6.32.y and newer
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