| Age | Commit message (Collapse) | Author |
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Linus Torvalds pointed out that our code was unbalanced when powering on
the panel with respect to the power off sequence in that we were failing
to restore the panel-fitter. The consequence of this would be that
across a simple DPMS off/on for a non-native mode, without an intervening
modeset, the panel fitter would remain disabled and the output would shift
on the panel.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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There's not much we can do here but hope for the best. However the first
failure happens quite frequently and if often remedied by the second
attempt to reset HEAD. So only print the error if that attempt also
fails.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=19802
Reported-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
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Otherwise we can't really fix the abi-braindeadness of forcing
libva to manually wait for rendering when switching rings. Which
in turn makes implementing hw semaphores a pointless exercise
(at least for ironlake).
[Also added the relaxed fencing param to explain the jump in
numbering - relaxed fencing is in -next.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Add a missing NULL check and fix the wrong address passed to kunmap()
in i830_cleanup().
Cc: stable@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[danvet: added cc stable]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Rename intel_mid_dma_pci to intel_mid_dma_pci_driver to pick up the
applied annotations of that suffix.
Reported-by: <major_Lee@wistron.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Currently while submitting scatterlists with more than one SG
entry the DMA buffer address from the first SG entry is inserted
into all initialized DMA buffer descriptors. This is due to the
typo in the for_each_sg() loop where the scatterlist pointer is
used for obtaining the DMA buffer address and _not_ the SG list
iterator.
As a result all received data will be written only into the first
DMA buffer while reading. While writing the data from the first
DMA buffer is send to the device multiple times. This caused
the filesystem destruction on the MMC card when using DMA in
mxcmmc driver.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Using %pR standardizes the struct resource output.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Changed Makefile to use <modules>-y instead of <modules>-objs. Following
(documentation/kbuild/makefiles.txt).
Signed-off-by: Tracey Dent <tdent48227@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Fix kernel warnings caused by the driver name of GSC PS/2 containing '/'.
The following warnings are observed on a K410 system :
[ 10.700000] name 'GSC PS/2 keyboard'
[ 10.732000] ------------[ cut here ]------------
[ 10.772000] WARNING: at fs/proc/generic.c:323
[ 10.828000] Modules linked in:
[ 10.916000]
[ 10.916000] YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
[ 10.936000] PSW: 00000000000001000000000000001111 Not tainted
[ 10.992000] r00-03 0004000f 104fe3e0 10201ea0 00000000
[ 11.060000] r04-07 4fc405c8 00000006 4fc405c8 4fc40694
[ 11.124000] r08-11 4fc40708 10438aa0 00000001 1043bfc8
[ 11.184000] r12-15 104ff2a0 104ff2a0 4fc38634 104ff2a0
[ 11.248000] r16-19 f0001570 10479af0 f000006c 1044fe50
[ 11.308000] r20-23 00000000 00000028 104cd858 00000000
[ 11.372000] r24-27 ffffffff 0000000e 1044fe10 1043bbe0
[ 11.436000] r28-31 0000002b 00000078 4fc40800 0000000d
[ 11.496000] sr00-03 00000000 00000000 00000000 00000000
[ 11.560000] sr04-07 00000000 00000000 00000000 00000000
[ 11.624000]
[ 11.688000] IASQ: 00000000 00000000 IAOQ: 10201ea0 10201ea4
[ 11.704000] IIR: 03ffe01f ISR: 00000000 IOR: 0000000d
[ 11.772000] CPU: 0 CR30: 4fc40000 CR31: f01043b0
[ 11.836000] ORIG_R28: 4fc40940
[ 11.904000] IAOQ[0]: __xlate_proc_name+0x90/0xd0
[ 11.940000] IAOQ[1]: __xlate_proc_name+0x94/0xd0
[ 11.996000] RP(r2): __xlate_proc_name+0x90/0xd0
[ 12.052000] Backtrace:
[ 12.108000] [<10257790>] vsnprintf+0x290/0x4f4
[ 12.136000]
[ 12.188000] ---[ end trace 91bf6ece17e322dd ]---
[ 12.208000] serio: GSC PS/2 keyboard port at 0x0001c000 irq 19 @ 10:12:7
[ 12.264000] name 'GSC PS/2 mouse'
[ 12.344000] ------------[ cut here ]------------
[ 12.384000] WARNING: at fs/proc/generic.c:323
[ 12.436000] Modules linked in:
[ 12.524000]
[ 12.528000] YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
[ 12.544000] PSW: 00000000000001000000000000001111 Tainted: G W
[ 12.600000] r00-03 0004000f 104fe3e0 10201ea0 00000000
[ 12.680000] r04-07 4fc405c8 00000006 4fc405c8 4fc40694
[ 12.740000] r08-11 4fc40708 10438aa0 00000001 1043bfc8
[ 12.804000] r12-15 104ff2a0 104ff2a0 4fc38634 104ff2a0
[ 12.868000] r16-19 f0001570 10479af0 f000006c 1044fe50
[ 12.928000] r20-23 00000000 00000025 104cd858 00000000
[ 12.992000] r24-27 ffffffff 0000000e 1044fe10 1043bbe0
[ 13.056000] r28-31 00000028 00000078 4fc40800 0000000d
[ 13.116000] sr00-03 00000000 00000000 00000000 00000000
[ 13.180000] sr04-07 00000000 00000000 00000000 00000000
[ 13.244000]
[ 13.308000] IASQ: 00000000 00000000 IAOQ: 10201ea0 10201ea4
[ 13.324000] IIR: 03ffe01f ISR: 00000000 IOR: 0000000d
[ 13.392000] CPU: 0 CR30: 4fc40000 CR31: f01043b0
[ 13.456000] ORIG_R28: 4fc40940
[ 13.524000] IAOQ[0]: __xlate_proc_name+0x90/0xd0
[ 13.560000] IAOQ[1]: __xlate_proc_name+0x94/0xd0
[ 13.616000] RP(r2): __xlate_proc_name+0x90/0xd0
[ 13.672000] Backtrace:
[ 13.728000] [<10257790>] vsnprintf+0x290/0x4f4
[ 13.756000]
[ 13.808000] ---[ end trace 91bf6ece17e322de ]---
[ 13.828000] serio: GSC PS/2 mouse port at 0x00020100 irq 19 @ 10:12:8
Signed-off-by: Guy Martin <gmsoft@tuxicoman.be>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
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K class aka KittyHawk don't have LED support on their LCD. Installing
HP-UX confirmed this. The current led_wq fills the LCD with black
characters each time it runs.
The patch prevents the led_wq workqueue and its proc entry to be
created for KittyHawk machines.
It also increase min_cmd_delay as currently, one character out of two
is lost when a string is sent to the LCD.
Signed-off-by: Guy Martin <gmsoft@tuxicoman.be>
Signed-off-by: Kyle McMartin <kyle@mcmartin.c>
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The generic conversion eliminates the spurious no_ack and no_end
routines, converts all the cascaded handlers to handle_simple_irq() and
makes iosapic use a modified handle_percpu_irq() to become the same as
the CPU irq's. This isn't an essential change, but it eliminates the
mask/unmask overhead of handle_level_irq().
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Tested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
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The essential problem we're currently having is that dino (and gsc) is a
cascaded CPU interrupt. Under the old __do_IRQ() handler, our CPU
interrupts basically did an ack followed by an end. In the new scheme,
we replaced them with level handlers which do a mask, an ack and then an
unmask (but no end). Instead, with the renaming of end to eoi, we
actually want to call the percpu flow handlers, because they actually
have all the characteristics we want.
This patch does the conversion and gets my C360 booting again.
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
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Fixes the modesetting on the secondary panel of the Libretto W100 and
presumably many more Ironlake laptops with SDVO LVDS displays.
Reported-and-tested-by: Matthew Willoughby <mattfredwill@gmail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
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Include sched.h to ensure sched_clock() has the notrace
annotation, and mark any functions it calls as notrace
too.
Include sched.h to ensure sched_clock() has the notrace
annotation, and mark any functions it calls as notrace
too.
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This patch fixes a compilation issue when compiling PCMCIA SA1100
support as a module with PCMCIA_DEBUG enabled. The symbol
soc_pcmcia_debug was not beeing exported.
ARM: pcmcia: Fix for building DEBUG with sa11xx_base.c as a module.
This patch fixes a compilation issue when compiling PCMCIA SA1100
support as a module with PCMCIA_DEBUG enabled. The symbol
soc_pcmcia_debug was not beeing exported.
Cc: <stable@kernel.org>
Signed-off-by: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The existing code invokes the syscall with rubbish in r7,
due to what looks like an incorrect literal load idiom.
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Added a quirk to cxt5066_cfg_tbl to enable jack sense for ThinkPad Edge 13.
Reference: http://launchpad.net/bugs/685015
Signed-off-by: Manoj Iyer <manoj.iyer@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Commit f7cb1933621bce66a77f690776a16fe3ebbc4d58 ("SLUB: Pass active
and inactive redzone flags instead of boolean to debug functions")
missed two instances of check_object(). This caused a lot of warnings
during 'slabinfo -v' finally leading to a crash:
BUG ext4_xattr: Freepointer corrupt
...
BUG buffer_head: Freepointer corrupt
...
BUG ext4_alloc_context: Freepointer corrupt
...
...
BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
IP: [<ffffffff810a291f>] file_sb_list_del+0x1c/0x35
PGD 79d78067 PUD 79e67067 PMD 0
Oops: 0002 [#1] SMP
last sysfs file: /sys/kernel/slab/:t-0000192/validate
This patch fixes the problem by converting the two missed instances.
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tero Roponen <tero.roponen@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Use the hardware DDA to calculate the ratio with as much accuracy as is
possible.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
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git://xenbits.xen.org/people/sstabellini/linux-pvhvm
* '2.6.37-rc4-pvhvm-fixes' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm:
xen: unplug the emulated devices at resume time
xen: fix save/restore for PV on HVM guests with pirq remapping
xen: resume the pv console for hvm guests too
xen: fix MSI setup and teardown for PV on HVM guests
xen: use PHYSDEVOP_get_free_pirq to implement find_unbound_pirq
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The MACH_MINI2440 entry requires the backlight LED driver, but this
subsystem has not been enabled and the select of LEDS_TRIGGER_BACKLIGHT
alone is insufficient to enable the necessary bits of the LED driver.
Add NEW_LEDS, LEDS_CLASS and LEDS_TRIGGER to the select to allow the
kernel to link.
This fixes the following error:
drivers/built-in.o: In function `led_trigger_set':
/home/ben/linux.git/drivers/leds/led-triggers.c:116: undefined reference to `led_brightness_set'
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen
* 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
xen: allocate irq descs on any NUMA node
xen: prevent crashes with non-HIGHMEM 32-bit kernels with largeish memory
xen: use default_idle
xen: clean up "extra" memory handling some more
* 'upstream/bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
xen: x86/32: perform initial startup on initial_page_table
xen: don't bother to stop other cpus on shutdown/reboot
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If we leave the registers in a conflicting state then when we attempt
to teardown the active mode, we will not disable the pipes and planes
in the correct order -- leaving a plane reading from a disabled pipe and
possibly leading to undefined behaviour.
Reported-and-tested-by: Andy Whitcroft <apw@canonical.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=32078
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ASoC: omap: N810: Don't select CONFIG_OMAP_MUX but make it as dependency
ALSA: hda: Use "alienware" model quirk for another SSID
ASoC: WM8731: Fix incorrect mask for bypass path disable
s6105-ipcam: fix compilation
s6000-pcm: fix compilation
s6000-i2s: fix compilation
ASoC: Fix missing spin_unlock_irqrestore
ALSA: Fix SNDCTL_DSP_RESET ioctl for OSS emulation
ASoC: Add missing dev_set_drvdata in p1022_ds_probe
ASoC: Add missing dev_set_drvdata in mpc8610_hpcd_probe
ASoC: Remove unneeded !! operations while checking return value of nuc900_checkready
ASoC: Fix compile error for nuc900-pcm.c
ASoC: Fix prototype for nuc900_ac97_probe and nuc900_ac97_remove
ASoC: Fix compile error for nuc900-ac97.c
ALSA: hda: Use BIOS auto-parsing instead of existing model quirk for MEDION MD2
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* 'linux-next' of git://git.infradead.org/ubi-2.6:
UBI: fix corrupted PEB detection for NOR flash
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git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: se/7724: Remove FSI/B of GPIO init code
sh: se/7724: Update clock framework of FSI clock to non-legacy
sh: Assume new page cache pages have dirty dcache lines.
sh: boards: mach-se: use IS_ERR() instead of NULL check
sh: Add div6_reparent_clks to clock framework for FSI
dma: shdma: add a MODULE_ALIAS() to allow module autoloading
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git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6
* 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6:
lxfb: Maintain video processor palette through suspend/resume
video: da8xx: Register IRQ as last thing in driver probing.
framebuffer: fix fbcmap.c kernel-doc warning
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Implement asm/syscall.h for the MN10300 arch.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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My new shiny code for corrupted PEB detection has NOR specific bug.
We tread PEB as corrupted and preserve it, if
1. EC header is OK.
2. VID header is corrupted.
3. data area is not "all 0xFFs"
In case of NOR we have 'nor_erase_prepare()' quirk, which invalidates
the headers before erasing the PEB. And we invalidate first the VID
header, and then the EC header. So if a power cut happens after we have
invalidated the VID header, but before we have invalidated the EC
header, we end up with a PEB which satisfies the above 3 conditions,
and the scanning code will treat it as corrupted, and will print
scary warnings, wrongly.
This patch fixes the issue by firt invalidating the EC header, then
invalidating the VID header. In case of power cut inbetween, we still
just lose the EC header, and UBI can deal with this situation gracefully.
Thanks to Anatolij Gustschin <agust@denx.de> for tracking this down.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Reported-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Anatolij Gustschin <agust@denx.de>
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On the docking station for the Lenovo T410 and T410s, the line-out
doesn't work. The trouble seems to be that it generates a plug event,
but then doesn't report that the jack is connected. So automute mutes
the jack when you plug something into it. The following patch (next
message) fixes it.
Signed-off-by: John Baboval <john.baboval at virtualcomputer.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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BugLink: https://launchpad.net/bugs/595482
The original reporter states that audible playback from the internal
speaker is inaudible despite the hardware being properly detected. To
work around this symptom, he uses the model=lg quirk to properly enable
both playback, capture, and jack sense. Another user corroborates this
workaround on separate hardware. Add this PCI SSID to the quirk table
to enable it for further LG P1 Expresses.
Reported-and-tested-by: Philip Peitsch <philip.peitsch@gmail.com>
Tested-by: nikhov
Cc: <stable@kernel.org> [2.6.32+]
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Use the ccflag-y flag instead of EXTRA_CFLAGS because EXTRA_CFLAGS is
deprecated and should now be switched. According to (documentation/kbuild/makefiles.txt).
Signed-off-by: Tracey Dent <tdent48227@gmail.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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We should not call kfree(dma) in mid_setup_dma error path because
the memory is allocated in intel_mid_dma_probe and will be freed
in intel_mid_dma_probe error path if mid_setup_dma return error.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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otherwise, i will be -1 inside the latest iteration of the while loop.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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se7724 board does not have FSI/B.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: length resolution should be reported units/mm
HID: add support for F430 Force Feedback Wheel
HID: egalax: Use kzalloc
HID: Remove KERN_DEBUG from dbg_hid use
Manually fixed trivial conflict in drivers/hid/hid-input.c (due to
removal of KERN_DEBUG from dbg_hid use clashing with new keycode
interface switch)
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Wakeup-on-timer code does not have/need debugfs dependency. Move
the function out of debugfs ifdef.
Fixes compile error when CONFIG_DEBUG_FS is disabled but PM debug is
enabled.
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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Allocate irq descs on any NUMA node (we don't care) rather than
specifically node 0, which may not exist.
(At the moment NUMA is meaningless within a domain, so any info
the kernel has is just from an SRAT table we haven't suppressed/disabled.)
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
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If this is a non-HIGHMEM 32-bit kernel, then the page structures only go
up to the limit of addressable memory, even if more memory is physically
present. Don't try to add that extra memory to the balloon.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
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If a user manages to trigger an oops with fs set to KERNEL_DS, fs is not
otherwise reset before do_exit(). do_exit may later (via mm_release in
fork.c) do a put_user to a user-controlled address, potentially allowing
a user to leverage an oops into a controlled write into kernel memory.
This is only triggerable in the presence of another bug, but this
potentially turns a lot of DoS bugs into privilege escalations, so it's
worth fixing. I have proof-of-concept code which uses this bug along
with CVE-2010-3849 to write a zero to an arbitrary kernel address, so
I've tested that this is not theoretical.
A more logical place to put this fix might be when we know an oops has
occurred, before we call do_exit(), but that would involve changing
every architecture, in multiple places.
Let's just stick it in do_exit instead.
[akpm@linux-foundation.org: update code comment]
Signed-off-by: Nelson Elhage <nelhage@ksplice.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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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commit 62b61f611e ("ksm: memory hotremove migration only") caused the
following new lockdep warning.
=======================================================
[ INFO: possible circular locking dependency detected ]
-------------------------------------------------------
bash/1621 is trying to acquire lock:
((memory_chain).rwsem){.+.+.+}, at: [<ffffffff81079339>]
__blocking_notifier_call_chain+0x69/0xc0
but task is already holding lock:
(ksm_thread_mutex){+.+.+.}, at: [<ffffffff8113a3aa>]
ksm_memory_callback+0x3a/0xc0
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (ksm_thread_mutex){+.+.+.}:
[<ffffffff8108b70a>] lock_acquire+0xaa/0x140
[<ffffffff81505d74>] __mutex_lock_common+0x44/0x3f0
[<ffffffff81506228>] mutex_lock_nested+0x48/0x60
[<ffffffff8113a3aa>] ksm_memory_callback+0x3a/0xc0
[<ffffffff8150c21c>] notifier_call_chain+0x8c/0xe0
[<ffffffff8107934e>] __blocking_notifier_call_chain+0x7e/0xc0
[<ffffffff810793a6>] blocking_notifier_call_chain+0x16/0x20
[<ffffffff813afbfb>] memory_notify+0x1b/0x20
[<ffffffff81141b7c>] remove_memory+0x1cc/0x5f0
[<ffffffff813af53d>] memory_block_change_state+0xfd/0x1a0
[<ffffffff813afd62>] store_mem_state+0xe2/0xf0
[<ffffffff813a0bb0>] sysdev_store+0x20/0x30
[<ffffffff811bc116>] sysfs_write_file+0xe6/0x170
[<ffffffff8114f398>] vfs_write+0xc8/0x190
[<ffffffff8114fc14>] sys_write+0x54/0x90
[<ffffffff810028b2>] system_call_fastpath+0x16/0x1b
-> #0 ((memory_chain).rwsem){.+.+.+}:
[<ffffffff8108b5ba>] __lock_acquire+0x155a/0x1600
[<ffffffff8108b70a>] lock_acquire+0xaa/0x140
[<ffffffff81506601>] down_read+0x51/0xa0
[<ffffffff81079339>] __blocking_notifier_call_chain+0x69/0xc0
[<ffffffff810793a6>] blocking_notifier_call_chain+0x16/0x20
[<ffffffff813afbfb>] memory_notify+0x1b/0x20
[<ffffffff81141f1e>] remove_memory+0x56e/0x5f0
[<ffffffff813af53d>] memory_block_change_state+0xfd/0x1a0
[<ffffffff813afd62>] store_mem_state+0xe2/0xf0
[<ffffffff813a0bb0>] sysdev_store+0x20/0x30
[<ffffffff811bc116>] sysfs_write_file+0xe6/0x170
[<ffffffff8114f398>] vfs_write+0xc8/0x190
[<ffffffff8114fc14>] sys_write+0x54/0x90
[<ffffffff810028b2>] system_call_fastpath+0x16/0x1b
But it's a false positive. Both memory_chain.rwsem and ksm_thread_mutex
have an outer lock (mem_hotplug_mutex). So they cannot deadlock.
Thus, This patch annotate ksm_thread_mutex is not deadlock source.
[akpm@linux-foundation.org: update comment, from Hugh]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Presently hwpoison is using lock_system_sleep() to prevent a race with
memory hotplug. However lock_system_sleep() is a no-op if
CONFIG_HIBERNATION=n. Therefore we need a new lock.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Suggested-by: Hugh Dickins <hughd@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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->releasepage() does not remove the page from the mapping.
Acked-by: Neil Brown <neilb@suse.de>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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On stock 2.6.37-rc4, running:
# mount lilith:/export /mnt/lilith
# find /mnt/lilith/ -type f -print0 | xargs -0 file
crashes the machine fairly quickly under Xen. Often it results in oops
messages, but the couple of times I tried just now, it just hung quietly
and made Xen print some rude messages:
(XEN) mm.c:2389:d80 Bad type (saw 7400000000000001 != exp
3000000000000000) for mfn 1d7058 (pfn 18fa7)
(XEN) mm.c:964:d80 Attempt to create linear p.t. with write perms
(XEN) mm.c:2389:d80 Bad type (saw 7400000000000010 != exp
1000000000000000) for mfn 1d2e04 (pfn 1d1fb)
(XEN) mm.c:2965:d80 Error while pinning mfn 1d2e04
Which means the domain tried to map a pagetable page RW, which would
allow it to map arbitrary memory, so Xen stopped it. This is because
vm_unmap_ram() left some pages mapped in the vmalloc area after NFS had
finished with them, and those pages got recycled as pagetable pages
while still having these RW aliases.
Removing those mappings immediately removes the Xen-visible aliases, and
so it has no problem with those pages being reused as pagetable pages.
Deferring the TLB flush doesn't upset Xen because it can flush the TLB
itself as needed to maintain its invariants.
When unmapping a region in the vmalloc space, clear the ptes
immediately. There's no point in deferring this because there's no
amortization benefit.
The TLBs are left dirty, and they are flushed lazily to amortize the
cost of the IPIs.
This specific motivation for this patch is an oops-causing regression
since 2.6.36 when using NFS under Xen, triggered by the NFS client's use
of vm_map_ram() introduced in 56e4ebf877b60 ("NFS: readdir with vmapped
pages") . XFS also uses vm_map_ram() and could cause similar problems.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Bryan Schumaker <bjschuma@netapp.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Alex Elder <aelder@sgi.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The AMD Geode CS5536 Companion Device Silicon Revision B1 Specification
Update mentions the follow as issue #36:
"Atomic write transactions to the atomic GPIO High Bank Feature Bit
registers should only affect the bits selected [...]"
"after Suspend, an atomic write transaction [...] will clear all
non-selected bits of the accessed register."
In other words, writing to the high bank for a single GPIO bit will
clear every other GPIO bit (but only sometimes after a suspend).
The workaround described is obvious and simple; do a read-modify-write.
This patch does that, and documents why we're doing it.
Signed-off-by: Andres Salomon <dilinger@queued.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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reiserfs_acl_chmod() can be called by reiserfs_set_attr() and then take
the reiserfs lock a second time. Thereafter it may call journal_begin()
that definitely requires the lock not to be nested in order to release
it before taking the journal mutex because the reiserfs lock depends on
the journal mutex already.
So, aviod nesting the lock in reiserfs_acl_chmod().
Reported-by: Pawel Zawora <pzawora@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tested-by: Pawel Zawora <pzawora@gmail.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: <stable@kernel.org> [2.6.32.x+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It's not useful to build LED triggers when there's no LEDs that can be
triggered by them. Therefore, fix up the dependencies so that this
cannot happen, and fix a few users that select triggers to depend on
LEDS_CLASS as well (there is also one user that also selects LEDS_CLASS,
which is OK).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Tested-by: Ingo Molnar <mingo@elte.hu>
Cc: Arnd Hannemann <arnd@arndnet.de>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Richard Purdie <rpurdie@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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