Pull scheduler fix from Thomas Gleixner:
"Prevent a possible divide by zero in the debugging code"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched: Fix possible divide by zero in avg_atom() calculation
Pull irq fixes from Thomas Gleixner:
"Three patches addressing shortcomings in the ARM gic interrupt chip
driver"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip: gic: Fix core ID calculation when topology is read from DT
irqchip: gic: Add binding probe for ARM GIC400
irqchip: gic: Add support for cortex a7 compatible string
Pull timer fix from Thomas Gleixner:
"A single fix for a long standing issue in the alarm timer subsystem,
which was noticed recently when people finally started to use alarm
timers for serious work"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
alarmtimer: Fix bug where relative alarm timers were treated as absolute
Pull RCU fixes from Thomas Gleixner:
"Two RCU patches:
- Address a serious performance regression on open/close caused by
commit ac1bea8578 ("Make cond_resched() report RCU quiescent
states")
- Export RCU debug functions. Not a regression, but enablement to
address a serious recursion bug in the sl*b allocators in 3.17"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
rcu: Reduce overhead of cond_resched() checks for RCU
rcu: Export debug_init_rcu_head() and and debug_init_rcu_head()
A smaller set of fixes this week, and all regression fixes:
- a handful of issues fixed on at91 with common clock conversion
- a set of fixes for Marvell mvebu (SMP, coherency, PM)
- a clock fix for i.MX6Q.
- ... and a SMP/hotplug fix for Exynos
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"A smaller set of fixes this week, and all regression fixes:
- a handful of issues fixed on at91 with common clock conversion
- a set of fixes for Marvell mvebu (SMP, coherency, PM)
- a clock fix for i.MX6Q.
- ... and a SMP/hotplug fix for Exynos"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: EXYNOS: Fix core ID used by platsmp and hotplug code
ARM: at91/dt: add missing clocks property to pwm node in sam9x5.dtsi
ARM: at91/dt: fix usb0 clocks definition in sam9n12 dtsi
ARM: at91: at91sam9x5: correct typo error for ohci clock
ARM: clk-imx6q: parent lvds_sel input from upstream clock gates
ARM: mvebu: Fix coherency bus notifiers by using separate notifiers
ARM: mvebu: Fix the operand list in the inline asm of armada_370_xp_pmsu_idle_enter
ARM: mvebu: fix SMP boot for Armada 38x and Armada 375 Z1 in big endian
Pull x86 fixes from Peter Anvin:
"A couple of key fixes and a few less critical ones. The main ones
are:
- add a .bss section to the PE/COFF headers when building with EFI
stub
- invoke the correct paravirt magic when building the espfix page
tables
Unfortunately both of these areas also have at least one additional
fix each still in thie pipeline, but which are not yet ready to push"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Remove unused variable "polling"
x86/espfix/xen: Fix allocation of pages for paravirt page tables
x86/efi: Include a .bss section within the PE/COFF headers
efi: fdt: Do not report an error during boot if UEFI is not available
efi/arm64: efistub: remove local copy of linux_banner
Fixes to temperature limit write operations in adt7470 driver.
Also, dashes are not allowed in hwmon 'name' attributes.
Fix drivers where necessary.
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
"More fallout from module tests and code inspection.
Fixes to temperature limit write operations in adt7470 driver. Also,
dashes are not allowed in hwmon 'name' attributes. Fix drivers where
necessary"
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (adt7470) Fix writes to temperature limit registers
hwmon: (da9055) Don't use dash in the name attribute
hwmon: (da9052) Don't use dash in the name attribute
- Fix for a recently introduced NULL pointer dereference in the core
system suspend code occuring when platforms without ACPI attempt to
use the "freeze" sleep state from Zhang Rui.
- Fix for a recently introduced build warning in cpufreq headers from
Brian W Hart.
- Fix for a 3.13 cpufreq regression related to sysem resume that
triggers on some systems with multiple CPU clusters from Viresh Kumar.
- Fix for a 3.4 regression in request_firmware() resulting in
WARN_ON()s on some systems during system resume from Takashi Iwai.
- Revert of the ACPI video commit that changed the default value of
the video.brightness_switch_enabled command line argument to 0 as
it has been reported to break existing setups.
- ACPI device enumeration documentation update to take recent code
changes into account and make the documentation match the code again
from Darren Hart.
- Fixes for the sa1110, imx6q, kirkwood, and cpu0 cpufreq drivers
from Linus Walleij, Nicolas Del Piano, Quentin Armitage, Viresh Kumar.
- New ACPI video blacklist entry for HP ProBook 4540s from Hans de Goede.
/
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Merge tag 'pm+acpi-3.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management fixes from Rafael Wysocki:
"These are a few recent regression fixes, a revert of the ACPI video
commit I promised, a system resume fix related to request_firmware(),
an ACPI video quirk for one more Win8-oriented BIOS, an ACPI device
enumeration documentation update and a few fixes for ARM cpufreq
drivers.
Specifics:
- Fix for a recently introduced NULL pointer dereference in the core
system suspend code occuring when platforms without ACPI attempt to
use the "freeze" sleep state from Zhang Rui.
- Fix for a recently introduced build warning in cpufreq headers from
Brian W Hart.
- Fix for a 3.13 cpufreq regression related to sysem resume that
triggers on some systems with multiple CPU clusters from Viresh
Kumar.
- Fix for a 3.4 regression in request_firmware() resulting in
WARN_ON()s on some systems during system resume from Takashi Iwai.
- Revert of the ACPI video commit that changed the default value of
the video.brightness_switch_enabled command line argument to 0 as
it has been reported to break existing setups.
- ACPI device enumeration documentation update to take recent code
changes into account and make the documentation match the code
again from Darren Hart.
- Fixes for the sa1110, imx6q, kirkwood, and cpu0 cpufreq drivers
from Linus Walleij, Nicolas Del Piano, Quentin Armitage, Viresh
Kumar.
- New ACPI video blacklist entry for HP ProBook 4540s from Hans de
Goede"
* tag 'pm+acpi-3.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: make table sentinel macros unsigned to match use
cpufreq: move policy kobj to policy->cpu at resume
cpufreq: cpu0: OPPs can be populated at runtime
cpufreq: kirkwood: Reinstate cpufreq driver for ARCH_KIRKWOOD
cpufreq: imx6q: Select PM_OPP
cpufreq: sa1110: set memory type for h3600
ACPI / video: Add use_native_backlight quirk for HP ProBook 4540s
PM / sleep: fix freeze_ops NULL pointer dereferences
PM / sleep: Fix request_firmware() error at resume
Revert "ACPI / video: change acpi-video brightness_switch_enabled default to 0"
ACPI / documentation: Remove reference to acpi_platform_device_ids from enumeration.txt
Pull drm fixes from Dave Airlie:
"One nouveau deadlock fix, one qxl irq handling fix, and a set of
radeon pageflipping changes that fix regressions in pageflipping since
-rc1 along with a leak and backlight fix.
The pageflipping fixes are a bit bigger than I'd like, but there has
been a few people focused on testing them"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/radeon: Make classic pageflip completion path less racy.
drm/radeon: Add missing vblank_put in pageflip ioctl error path.
drm/radeon: Remove redundant fence unref in pageflip path.
drm/radeon: Complete page flip even if waiting on the BO fence fails
drm/radeon: Move pinning the BO back to radeon_crtc_page_flip()
drm/radeon: Prevent too early kms-pageflips triggered by vblank.
drm/radeon: set default bl level to something reasonable
drm/radeon: avoid leaking edid data
drm/qxl: return IRQ_NONE if it was not our irq
drm/nouveau/therm: fix a potential deadlock in the therm monitoring code
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Merge tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random
Pull /dev/random fix from Ted Ts'o:
"Fix a BUG splat found by trinity"
* tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
random: check for increase of entropy_count because of signed conversion
Pull crypto fixes from Herbert Xu:
"This push fixes a boot hang in virt guests when the virtio RNG is
enabled"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
hwrng: virtio - ensure reads happen after successful probe
hwrng: fetch randomness only after device init
The expression entropy_count -= ibytes << (ENTROPY_SHIFT + 3) could
actually increase entropy_count if during assignment of the unsigned
expression on the RHS (mind the -=) we reduce the value modulo
2^width(int) and assign it to entropy_count. Trinity found this.
[ Commit modified by tytso to add an additional safety check for a
negative entropy_count -- which should never happen, and to also add
an additional paranoia check to prevent overly large count values to
be passed into urandom_read(). ]
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
When CPU topology is specified in device tree, cpu_logical_map() does
not return core ID anymore, but rather full MPIDR value. This breaks
existing calculation of PMU register offsets on Exynos SoCs.
This patch fixes the problem by adjusting the code to use only core ID
bits of the value returned by cpu_logical_map() to allow CPU topology to
be specified in device tree on Exynos SoCs.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
It fixes a hard machine hang regression for boards where only pcie is
active but no sata, as the latest imx6-pcie driver is no longer enabling
the upstream clock directly but only lvds clk out.
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Merge tag 'imx-fixes-3.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes
Merge "ARM: imx: fixes for 3.16, 2nd take" from Shawn Guo:
The i.MX fixes for 3.16, 2nd take:
It fixes a hard machine hang regression for boards where only pcie is
active but no sata, as the latest imx6-pcie driver is no longer enabling
the upstream clock directly but only lvds clk out.
* tag 'imx-fixes-3.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
ARM: clk-imx6q: parent lvds_sel input from upstream clock gates
Signed-off-by: Olof Johansson <olof@lixom.net>
- Fix SMP boot on 38x/375 in big endian
- Fix operand list for pmsu on 370/XP
- Fix coherency bus notifiers
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Merge tag 'mvebu-fixes-3.16-3' of git://git.infradead.org/linux-mvebu into fixes
Merge "mvebu fixes for v3.16 (round 3)" from Jason Cooper:
- Fix SMP boot on 38x/375 in big endian
- Fix operand list for pmsu on 370/XP
- Fix coherency bus notifiers
* tag 'mvebu-fixes-3.16-3' of git://git.infradead.org/linux-mvebu:
ARM: mvebu: Fix coherency bus notifiers by using separate notifiers
ARM: mvebu: Fix the operand list in the inline asm of armada_370_xp_pmsu_idle_enter
ARM: mvebu: fix SMP boot for Armada 38x and Armada 375 Z1 in big endian
Signed-off-by: Olof Johansson <olof@lixom.net>
flock, a change to use GFP_NOFS to avoid recursion on a rarely used
code path and a fix for a race relating to the glock lru.
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Merge tag 'gfs2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes
Pull gfs2 fixes from Steven Whitehouse:
"This patch set contains two minor docs/spelling fixes, some fixes for
flock, a change to use GFP_NOFS to avoid recursion on a rarely used
code path and a fix for a race relating to the glock lru"
* tag 'gfs2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes:
GFS2: fs/gfs2/rgrp.c: kernel-doc warning fixes
GFS2: memcontrol: Spelling s/invlidate/invalidate/
GFS2: Allow caching of glocks for flock
GFS2: Allow flocks to use normal glock dq rather than dq_wait
GFS2: replace count*size kzalloc by kcalloc
GFS2: Use GFP_NOFS when allocating glocks
GFS2: Fix race in glock lru glock disposal
GFS2: Only wait for demote when last holder is dequeued
device's block size.
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Merge tag 'dm-3.16-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
"Fix the dm-thinp and dm-cache targets to disallow changing the data
device's block size"
* tag 'dm-3.16-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm cache metadata: do not allow the data block size to change
dm thin metadata: do not allow the data block size to change
1. Fix UBI fastmap support which we broke in 3.16-rc1 by reversing the
volumes RB-tree sorting criteria.
2. Make sure that we scrub all PEBs where we see bit-flips - we were missing
some of them when the fastmap feature was enabled.
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Merge tag 'upstream-3.16-rc6' of git://git.infradead.org/linux-ubifs
Pull UBI fixes from Artem Bityutskiy:
"Two UBI fastmap-related fixes for v3.16:
- fix UBI fastmap support which we broke in 3.16-rc1 by reversing the
volumes RB-tree sorting criteria.
- make sure that we scrub all PEBs where we see bit-flips - we were
missing some of them when the fastmap feature was enabled"
* tag 'upstream-3.16-rc6' of git://git.infradead.org/linux-ubifs:
UBI: fastmap: do not miss bit-flips
UBI: fix the volumes tree sorting criteria
Fixes for low memory perforamnce regressions and a quota inode handling
regression.
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Merge tag 'xfs-for-linus-3.16-rc5' of git://oss.sgi.com/xfs/xfs
Pull xfs fixes from Dave Chinner:
"Fixes for low memory perforamnce regressions and a quota inode
handling regression.
These are regression fixes for issues recently introduced - the change
in the stack switch location is fairly important, so I've held off
sending this update until I was sure that it still addresses the stack
usage problem the original solved. So while the commits in the xfs
tree are recent, it has been under tested for several weeks now"
* tag 'xfs-for-linus-3.16-rc5' of git://oss.sgi.com/xfs/xfs:
xfs: null unused quota inodes when quota is on
xfs: refine the allocation stack switch
Revert "xfs: block allocation work needs to be kswapd aware"
The pwm driver requires a clocks property referencing the pwm peripheral
clk.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Correct the typo error for the second "uhphs_clk".
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Certain GIC implementation, namely those found on earlier, single
cluster, Exynos SoCs, have registers mapped without per-CPU banking,
which means that the driver needs to use different offset for each CPU.
Currently the driver calculates the offset by multiplying value returned
by cpu_logical_map() by CPU offset parsed from DT. This is correct when
CPU topology is not specified in DT and aforementioned function returns
core ID alone. However when DT contains CPU topology, the function
changes to return cluster ID as well, which is non-zero on mentioned
SoCs and so breaks the calculation in GIC driver.
This patch fixes this by masking out cluster ID in CPU offset
calculation so that only core ID is considered. Multi-cluster Exynos
SoCs already have banked GIC implementations, so this simple fix should
be enough.
Reported-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reported-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Fixes: db0d4db22a ("ARM: gic: allow GIC to support non-banked setups")
Cc: <stable@vger.kernel.org> # v3.3+
Link: https://lkml.kernel.org/r/1405610624-18722-1-git-send-email-t.figa@samsung.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This patch removes the GLF_NOCACHE flag from the glocks associated with
flocks. There should be no good reason not to cache glocks for flocks:
they only force the glock to be demoted before they can be reacquired,
which can slow down performance and even cause glock hangs, especially
in cases where the flocks are held in Shared (SH) mode.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This patch allows flock glocks to use a non-blocking dequeue rather
than dq_wait. It also reverts the previous patch I had posted regarding
dq_wait. The reverted patch isn't necessarily a bad idea, but I decided
this might avoid unforeseen side effects, and was therefore safer.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Normally GFP_KERNEL is ok here, but there is now a rarely used code path
relating to deallocation of unlinked inodes (in certain corner cases)
which if hit at times of memory shortage can cause recursion while
trying to free memory.
One solution would be to try and move the gfs2_glock_get() call so
that it is no longer called while another glock is held, but that
doesn't look at all easy, so GFP_NOFS is the best solution for the
time being.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
We must not leave items on the LRU list with GLF_LOCK set, since
they can be removed if the glock is brought back into use, which
may then potentially result in a hang, waiting for GLF_LOCK to
clear.
It doesn't happen very often, since it requires a glock that has
not been used for a long time to be brought back into use at the
same moment that the shrinker is part way through disposing of
glocks.
The fix is to set GLF_LOCK at a later time, when we already know
that the other locks can be obtained. Also, we now only release
the lru_lock in case a resched is needed, rather than on every
iteration.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Function gfs2_glock_dq_wait is supposed to dequeue a glock and then
wait for the lock to be demoted. The problem is, if this is a shared
lock, its demote will depend on the other holders, which means you
might end up waiting forever because the other process is blocked.
This problem is especially apparent when dealing with nested flocks.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
The i.MX6 reference manual doesn't make a clear distinction
between the fixed clock divider and the enable gate for the
pcie and sata reference clocks. This lead to the lvds mux
inputs in the imx6q clk driver to be parented from the
ref clock (which is the divider) instead of the actual gate,
which in turn prevents the upstream clock to actually be
enabled when lvds clk out is active.
This fixes a hard machine hang regression in kernel 3.16 for
boards where only pcie is active but no sata, as with this
kernel version the imx6-pcie driver is no longer enabling
the upstream clock directly but only lvds clk out.
Reported-by: Arne Ruhnau <arne.ruhnau@target-sg.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Arne Ruhnau <arne.ruhnau@target-sg.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
* pm-sleep:
PM / sleep: fix freeze_ops NULL pointer dereferences
PM / sleep: Fix request_firmware() error at resume
* pm-cpufreq:
cpufreq: make table sentinel macros unsigned to match use
cpufreq: move policy kobj to policy->cpu at resume
cpufreq: cpu0: OPPs can be populated at runtime
cpufreq: kirkwood: Reinstate cpufreq driver for ARCH_KIRKWOOD
cpufreq: imx6q: Select PM_OPP
cpufreq: sa1110: set memory type for h3600
Commit 5eeaf1f189 (cpufreq: Fix build error on some platforms that
use cpufreq_for_each_*) moved function cpufreq_next_valid() to a public
header. Warnings are now generated when objects including that header
are built with -Wsign-compare (as an out-of-tree module might be):
.../include/linux/cpufreq.h: In function ‘cpufreq_next_valid’:
.../include/linux/cpufreq.h:519:27: warning: comparison between signed
and unsigned integer expressions [-Wsign-compare]
while ((*pos)->frequency != CPUFREQ_TABLE_END)
^
.../include/linux/cpufreq.h:520:25: warning: comparison between signed
and unsigned integer expressions [-Wsign-compare]
if ((*pos)->frequency != CPUFREQ_ENTRY_INVALID)
^
Constants CPUFREQ_ENTRY_INVALID and CPUFREQ_TABLE_END are signed, but
are used with unsigned member 'frequency' of cpufreq_frequency_table.
Update the macro definitions to be explicitly unsigned to match their
use.
This also corrects potentially wrong behavior of clk_rate_table_iter()
if unsigned long is wider than usigned int.
Fixes: 5eeaf1f189 (cpufreq: Fix build error on some platforms that use cpufreq_for_each_*)
Signed-off-by: Brian W Hart <hartb@linux.vnet.ibm.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
A few more fixes for 3.16. The pageflipping fixes I dropped last week
have finally shaped up so this is mostly fixes for fallout from the
pageflipping code changes. Also fix a memory leak and a black screen
when restoring the backlight on console unblanking.
* 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: Make classic pageflip completion path less racy.
drm/radeon: Add missing vblank_put in pageflip ioctl error path.
drm/radeon: Remove redundant fence unref in pageflip path.
drm/radeon: Complete page flip even if waiting on the BO fence fails
drm/radeon: Move pinning the BO back to radeon_crtc_page_flip()
drm/radeon: Prevent too early kms-pageflips triggered by vblank.
drm/radeon: set default bl level to something reasonable
drm/radeon: avoid leaking edid data
- Fixes console deadlock when resuming PV guests
- Fix regression hit when ballooning and resuming PV guests
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Merge tag 'stable/for-linus-3.16-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull Xen fixes from Konrad Rzeszutek Wilk:
"Two fixes found during migration of PV guests. David would be the one
doing this pull but he is on vacation.
Fixes:
- fix console deadlock when resuming PV guests
- fix regression hit when ballooning and resuming PV guests"
* tag 'stable/for-linus-3.16-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/balloon: set ballooned out pages as invalid in p2m
xen/manage: fix potential deadlock when resuming the console
I was cleaning out my INBOX and found two fixes from zhangwei from
a year ago that were lost in my mail. These fix an inconsistency between
trace_puts() and the way trace_printk() works. The reason this is
important to fix is because when trace_printk() doesn't have any
arguments, it turns into a trace_puts(). Not being able to enable a
stack trace against trace_printk() because it does not have any arguments
is quite confusing. Also, the fix is rather trivial and low risk.
While porting some changes to PowerPC I discovered that it still has
the function graph tracer filter bug that if you also enable stack tracing
the function graph tracer filter is ignored. I fixed that up.
Finally, Martin Lau, fixed a bug that would cause readers of the
ftrace ring buffer to block forever even though it was suppose to be
NONBLOCK.
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Merge tag 'trace-fixes-v3.16-rc5-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"A few more fixes for ftrace infrastructure.
I was cleaning out my INBOX and found two fixes from zhangwei from a
year ago that were lost in my mail. These fix an inconsistency
between trace_puts() and the way trace_printk() works. The reason
this is important to fix is because when trace_printk() doesn't have
any arguments, it turns into a trace_puts(). Not being able to enable
a stack trace against trace_printk() because it does not have any
arguments is quite confusing. Also, the fix is rather trivial and low
risk.
While porting some changes to PowerPC I discovered that it still has
the function graph tracer filter bug that if you also enable stack
tracing the function graph tracer filter is ignored. I fixed that up.
Finally, Martin Lau, fixed a bug that would cause readers of the
ftrace ring buffer to block forever even though it was suppose to be
NONBLOCK"
This also includes the fix from an earlier pull request:
"Oleg Nesterov fixed a memory leak that happens if a user creates a
tracing instance, sets up a filter in an event, and then removes that
instance. The filter allocates memory that is never freed when the
instance is destroyed"
* tag 'trace-fixes-v3.16-rc5-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ring-buffer: Fix polling on trace_pipe
tracing: Add TRACE_ITER_PRINTK flag check in __trace_puts/__trace_bputs
tracing: Fix graph tracer with stack tracer on other archs
tracing: Add ftrace_trace_stack into __trace_puts/__trace_bputs
tracing: instance_rmdir() leaks ftrace_event_file->filter
Need to protect mmio flip programming by event lock as well.
Need to also first enable pflip irq, then mmio program,
otherwise a flip completion may get unnoticed in the vblank
of actual completion if the flip is programmed, but
radeon_flip_work_func gets preempted immediately after
mmio programming and before vblank. In that case the
vblank irq handler wouldn't run radeon_crtc_handle_vblank()
with the completion check routine, miss the completed flip,
and only notice one vblank after actual completion, causing
a false/delayed report of flip completion.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Not needed anymore, as it is already unreffed within
radeon_flip_work_func() after its only use.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Otherwise the DRM core and userspace will be confused about which BO the
CRTC is scanning out.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
As well as enabling the vblank interrupt. These shouldn't take any
significant amount of time, but at least pinning the BO has actually been
seen to fail in practice before, in which case we need to let userspace
know about it.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Since 3.16-rc1 we have this new failure:
When the userspace XOrg ddx schedules vblank events to
trigger deferred kms-pageflips, e.g., via the OML_sync_control
extension call glXSwapBuffersMscOML(), or if a glXSwapBuffers()
is called immediately after completion of a previous swapbuffers
call, e.g., in a tight rendering loop with minimal rendering,
it happens frequently that the pageflip ioctl() is executed
within the same vblank in which a previous kms-pageflip completed,
or - for deferred swaps - always one vblank earlier than requested
by the client app.
This causes premature pageflips and detection of failure by
the ddx, e.g., XOrg log warnings like...
"(WW) RADEON(1): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 201025 < target_msc 201026"
... and error/invalid return values of glXWaitForSbcOML() and
Intel_swap_events extension.
Reason is the new way in which kms-pageflips are programmed
since 3.16.
This commit changes the time window in which the hw can
execute pending programmed pageflips. Before, a pending flip
would get executed anywhere within the vblank interval. Now
a pending flip only gets executed at the leading edge of
vblank (start of front porch), making sure that a invocation
of the pageflip ioctl() within a given vblank interval will
only lead to pageflip completion in the following vblank.
Tested to death on a DCE-4 card.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
If the value in the scratch register is 0, set it to the
max level. This fixes an issue where the console fb blanking
code calls back into the backlight driver on unblank and then
sets the backlight level to 0 after the driver has already
set the mode and enabled the backlight.
bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=81382https://bugs.freedesktop.org/show_bug.cgi?id=70207
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
Cc: stable@vger.kernel.org
In some cases we fetch the edid in the detect() callback
in order to determine what sort of monitor is connected.
If that happens, don't fetch the edid again in the get_modes()
callback or we will leak the edid.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Commit 3ab72f9156 "dt-bindings: add GIC-400 binding" added the
"arm,gic-400" compatible string, but the corresponding IRQCHIP_DECLARE
was never added to the gic driver.
Therefore add the missing irqchip declaration for it.
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Removed additional empty line and adapted commit message to mark it
as fixing an issue.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Will Deacon <will.deacon@arm.com>
Fixes: 3ab72f9156 ("dt-bindings: add GIC-400 binding")
Cc: <stable@vger.kernel.org> # v3.14+
Link: https://lkml.kernel.org/r/2621565.f5eISveXXJ@diego
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
