The document is largely not the same as the original that was crafted
from Frohwalt Egerer's document, but leave it in as a historical thank
you footnote.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Lots of grumpy maintainers would love to have annoying newbies and
disorganized bug reporters read Eric S. Raymond's "How To Ask Questions
The Smart Way". Simon Tatham's "How to Report Bugs Effectively" is also
relevant.
It's likely no one will bother to read these, but it does give
maintainers something to point to.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Outline how often it's polite to ping kernel maintainers about bugs, and
suggest that kernel maintainers should respond to bugs in 1 to 5
business days.
Emphasize that regressions, userspace breakage, and kernel crashes are
exceptions to that rule. Suggest escalation to LKML and Linus if these
bugs are ignored during the merge window.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
One of the most common frustrations maintainers have with bug reporters
is the email that starts with "I have a two year old kernel from an
embedded vendor with some random drivers and fixes thrown in, and it's
crashing".
Be specific about what kernel versions the upstream maintainers will fix
bugs in, and direct bug reporters to their Linux distribution or
embedded vendor if the bug is in an unsupported kernel.
Suggest that bug reporters should reproduce their bugs on the latest -rc
kernel.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Add a sub-heading, and emphasize reproducibility.
Suggest taking a picture of the oops message. (Did no one have cameras
in 2006?)
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
REPORTING-BUGS is pretty disorganized. Bug reporters are likely to be
in a frustrated, stressed frame of mind, so introduce methodical
step-by-step directions for how to report bugs. Use titles so people
can skim it if necessary.
Slight changes in procedures:
1. Encourage people to report bugs to maintainers and sub-system mailing
lists, not LKML at first. I've seen way too many people get lost in the
noise because they didn't Cc the maintainer or proper mailing list.
2. Link to bugzilla.kernel.org, and let people know that some
maintainers prefer bugs filed there vs. the mailing lists. (Perhaps we
need an entry in MAINTAINERS for which is preferred?)
3. If someone doesn't know where to report a bug, encourage them to both
file a bugzilla entry and email LKML. Their report is less likely to
get lost if there's a bugzilla entry.
Preserve text about reporting security bugs, and get_maintainer.pl.
More will be added/modified in upcoming patches.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Other paragraph format docs in Documentation don't use paragraph
indentations, so conform REPORTING-BUGS to that.
Re-wrap the paragraphs, keeping the doc to a 74-character line length,
since that's what the original seemed to use.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Pull {timer,irq,core} fixes from Thomas Gleixner:
- timer: bug fix for a cpu hotplug race.
- irq: single bugfix for a wrong return value, which prevents the
calling function to invoke the software fallback.
- core: bugfix which plugs two race confitions which can cause hotplug
per cpu threads to end up on the wrong cpu.
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
hrtimer: Don't reinitialize a cpu_base lock on CPU_UP
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip: gic: fix irq_trigger return
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
kthread: Prevent unpark race which puts threads on the wrong cpu
Pull x86 fixes from Ingo Molnar:
"Misc fixes"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Flush lazy MMU when DEBUG_PAGEALLOC is set
x86/mm/cpa/selftest: Fix false positive in CPA self test
x86/mm/cpa: Convert noop to functional fix
x86, mm: Patch out arch_flush_lazy_mmu_mode() when running on bare metal
x86, mm, paravirt: Fix vmalloc_fault oops during lazy MMU updates
Pull scheduler fixes from Ingo Molnar:
"Misc fixlets"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/cputime: Fix accounting on multi-threaded processes
sched/debug: Fix sd->*_idx limit range avoiding overflow
sched_clock: Prevent 64bit inatomicity on 32bit systems
sched: Convert BUG_ON()s in try_to_wake_up_local() to WARN_ON_ONCE()s
Pull drm fixes from Dave Airlie:
"One fix for a hotplug locking regressions, and one fix for an oops if
you unplug the monitor at an inopportune moment on the udl device."
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/fb-helper: Fix locking in drm_fb_helper_hotplug_event
udl: handle EDID failure properly.
Pull m68knommu fix from Greg Ungerer:
"This contains only a single compilation fix for ColdFire m68k targets
that use local non-GPIOLIB support."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
m68k: define a local gpio_request_one() function
Pull watchdog fix from Wim Van Sebroeck:
"It will fix compile errors for the at91rm9200_wdt driver"
* git://www.linux-watchdog.org/linux-watchdog:
watchdog: Revert the AT91RM9200_WATCHDOG dependency
Pull one more btrfs fix from Chris Mason:
"This has a recent fix from Josef for our tree log replay code. It
fixes problems where the inode counter for the number of bytes in the
file wasn't getting updated properly during fsync replay.
The commit did get rebased this morning, but it was only to clean up
the subject line. The code hasn't changed."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: make sure nbytes are right after log replay
doing: echo 1234 | tee -a /sys/kernel/debug/tracing/set_ftrace_pid
Luckily, this can only be done by root, but still is a nasty bug.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
iQEcBAABAgAGBQJRaK2+AAoJEOdOSU1xswtMw48IAJPcSNMl1+epx5cPw8pwf+y6
YYvs/Ud3BMPBL+mpNPGNFWY+dWJsAtCtAgkLi0WgdL+b9iPNZrmQqqcP5xWV4uKV
vRX2SPCQcyEn5keNnFdN3fN1R0+Gj4V8kLvxPqugzNrO9EHejx+TJFWjrONzkcSy
g90lY45jfGWW0OS4GuSwHFhKDgcx8/kgb4Whv+xrKzTuX2QkU1BhG9WPsjiHWiL5
WRYjC4LWafrWaPd4cIkzMqj1eU/hL8BkiLLQHM1Tw8yD7t8OPzgmuJMZEh6Cx1iW
/Xrm5QkNEcqQ/vSAC6aWUi22VEgRYDLg8WjngwuMgY1Qa3LE2ex8cUDyk7lJbas=
=SFA8
-----END PGP SIGNATURE-----
Merge tag 'trace-fixes-v3.9-rc-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull ftrace fixes from Steven Rostedt:
"Namhyung Kim found and fixed a bug that can crash the kernel by simply
doing: echo 1234 | tee -a /sys/kernel/debug/tracing/set_ftrace_pid
Luckily, this can only be done by root, but still is a nasty bug."
* tag 'trace-fixes-v3.9-rc-v3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftrace: Move ftrace_filter_lseek out of CONFIG_DYNAMIC_FTRACE section
tracing: Fix possible NULL pointer dereferences
Nothing is using it yet, but this will allow us to delay the open-time
checks to use time, without breaking the normal UNIX permission
semantics where permissions are determined by the opener (and the file
descriptor can then be passed to a different process, or the process can
drop capabilities).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Compiling the at91rm9200_wdt.c driver without at91rm9200
support was leading to several errors:
drivers/built-in.o: In function `at91_wdt_close':
at91_adc.c:(.text+0xc9fe4): undefined reference to `at91_st_base'
drivers/built-in.o: In function `at91_wdt_write':
at91_adc.c:(.text+0xca004): undefined reference to `at91_st_base'
drivers/built-in.o: In function `at91wdt_shutdown':
at91_adc.c:(.text+0xca01c): undefined reference to `at91_st_base'
drivers/built-in.o: In function `at91wdt_suspend':
at91_adc.c:(.text+0xca038): undefined reference to `at91_st_base'
drivers/built-in.o: In function `at91_wdt_open':
at91_adc.c:(.text+0xca0cc): undefined reference to `at91_st_base'
drivers/built-in.o:at91_adc.c:(.text+0xca2c8): more undefined references to
`at91_st_base' follow
So, reverting the modification of the "depends" Kconfig line
introduced by patch a6a1bcd37 (watchdog: at91rm9200: add DT support)
seems to be the good solution.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Revert commit 62a3ddef61 ("vfs: fix spinning prevention in prune_icache_sb").
This commit doesn't look right: since we are looking at the tail of the
list (sb->s_inode_lru.prev) if we want to skip an inode, we should put
it back at the head of the list instead of the tail, otherwise we will
keep spinning on it.
Discovered when investigating why prune_icache_sb came top in perf
reports of a swapping load.
Signed-off-by: Suleiman Souhlal <suleiman@google.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: stable@vger.kernel.org # v3.2+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Anatol Pomozov identified a race condition that hits module unloading
and re-loading. To quote Anatol:
"This is a race codition that exists between kset_find_obj() and
kobject_put(). kset_find_obj() might return kobject that has refcount
equal to 0 if this kobject is freeing by kobject_put() in other
thread.
Here is timeline for the crash in case if kset_find_obj() searches for
an object tht nobody holds and other thread is doing kobject_put() on
the same kobject:
THREAD A (calls kset_find_obj()) THREAD B (calls kobject_put())
splin_lock()
atomic_dec_return(kobj->kref), counter gets zero here
... starts kobject cleanup ....
spin_lock() // WAIT thread A in kobj_kset_leave()
iterate over kset->list
atomic_inc(kobj->kref) (counter becomes 1)
spin_unlock()
spin_lock() // taken
// it does not know that thread A increased counter so it
remove obj from list
spin_unlock()
vfree(module) // frees module object with containing kobj
// kobj points to freed memory area!!
kobject_put(kobj) // OOPS!!!!
The race above happens because module.c tries to use kset_find_obj()
when somebody unloads module. The module.c code was introduced in
commit 6494a93d55fa"
Anatol supplied a patch specific for module.c that worked around the
problem by simply not using kset_find_obj() at all, but rather than make
a local band-aid, this just fixes kset_find_obj() to be thread-safe
using the proper model of refusing the get a new reference if the
refcount has already dropped to zero.
See examples of this proper refcount handling not only in the kref
documentation, but in various other equivalent uses of this pattern by
grepping for atomic_inc_not_zero().
[ Side note: the module race does indicate that module loading and
unloading is not properly serialized wrt sysfs information using the
module mutex. That may require further thought, but this is the
correct fix at the kobject layer regardless. ]
Reported-analyzed-and-tested-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
While trying to track down a tree log replay bug I noticed that fsck was always
complaining about nbytes not being right for our fsynced file. That is because
the new fsync stuff doesn't wait for ordered extents to complete, so the inodes
nbytes are not necessarily updated properly when we log it. So to fix this we
need to set nbytes to whatever it is on the inode that is on disk, so when we
replay the extents we can just add the bytes that are being added as we replay
the extent. This makes it work for the case that we have the wrong nbytes or
the case that we logged everything and nbytes is actually correct. With this
I'm no longer getting nbytes errors out of btrfsck.
Cc: stable@vger.kernel.org
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This patch attempts to fix:
https://bugzilla.kernel.org/show_bug.cgi?id=56461
The symptom is a crash and messages like this:
chrome: Corrupted page table at address 34a03000
*pdpt = 0000000000000000 *pde = 0000000000000000
Bad pagetable: 000f [#1] PREEMPT SMP
Ingo guesses this got introduced by commit 611ae8e3f5 ("x86/tlb:
enable tlb flush range support for x86") since that code started to free
unused pagetables.
On x86-32 PAE kernels, that new code has the potential to free an entire
PMD page and will clear one of the four page-directory-pointer-table
(aka pgd_t entries).
The hardware aggressively "caches" these top-level entries and invlpg
does not actually affect the CPU's copy. If we clear one we *HAVE* to
do a full TLB flush, otherwise we might continue using a freed pmd page.
(note, we do this properly on the population side in pud_populate()).
This patch tracks whenever we clear one of these entries in the 'struct
mmu_gather', and ensures that we follow up with a full tlb flush.
BTW, I disassembled and checked that:
if (tlb->fullmm == 0)
and
if (!tlb->fullmm && !tlb->need_flush_all)
generate essentially the same code, so there should be zero impact there
to the !PAE case.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Artem S Tashkinov <t.artem@mailcity.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull SCSI target fixes from Nicholas Bellinger:
"Here are remaining target-pending items for v3.9-rc7 code.
The tcm_vhost patches are more than I'd usually include in a -rc7
pull, but are changes required for v3.9 to work correctly with the
pending vhost-scsi-pci QEMU upstream series merge. (Paolo CC'ed)
Plus Asias's conversion to use vhost_virtqueue->private_data + RCU for
managing vhost-scsi endpoints has gotten alot of review + testing over
the past weeks, and MST has ACKed the full series.
Also, there is a target patch to fix a long-standing bug within
control CDB handling with Standby/Offline/Transition ALUA port access
states, that had been incorrectly rejecting the control CDBs required
for LUN scan to work during these port group states. CC'ing to
stable."
* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
target: Fix incorrect fallthrough of ALUA Standby/Offline/Transition CDBs
tcm_vhost: Send bad target to guest when cmd fails
tcm_vhost: Add vhost_scsi_send_bad_target() helper
tcm_vhost: Fix tv_cmd leak in vhost_scsi_handle_vq
tcm_vhost: Remove double check of response
tcm_vhost: Initialize vq->last_used_idx when set endpoint
tcm_vhost: Use vq->private_data to indicate if the endpoint is setup
tcm_vhost: Use ACCESS_ONCE for vs->vs_tpg[target] access
This is a set of ten bug fixes (and two consisting of copyright year update
and version number change) pretty much all of which involve either a crash or
a hang except the removal of the random sleep from the qla2xxx driver (which
is a coding error so bad, we want it gone before anyone has a chance to copy
it).
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)
iQEcBAABAgAGBQJRaE+2AAoJEDeqqVYsXL0MeuoH/2kwVhnqMrlzu+5ROY+0+MsY
7rqSJImGvEWYAU/MawV1ujV0rMpxupZ1qMJvRtcZapyiMtz/Ms9lVm4YIqdPWnIr
HCxSIviC5RtAkRObFX6vQoYXhRL73TyyndV/1lM363sDyLgIKfb6F3F7jsPV04DI
28AqIzi7tVfhgLhI4whcbVGxocqldbwmJehZPVqzNskPbj/7l2S21IVezc9jwIhz
LjP6kYr9l9NtSDI2XvjiQ0TMTpJs+F+9rR1cPuT8CcEIzOBSql2Vpi186qO97rdI
owzzLKrm/jo7bjMkIuaf7FbGw+l5TjteR71KVRTaYgqotRRd7W1UT6A7xjqM4EI=
=6vuV
-----END PGP SIGNATURE-----
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is a set of ten bug fixes (and two consisting of copyright year
update and version number change) pretty much all of which involve
either a crash or a hang except the removal of the random sleep from
the qla2xxx driver (which is a coding error so bad, we want it gone
before anyone has a chance to copy it)."
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
[SCSI] lpfc: fix potential NULL pointer dereference in lpfc_sli4_rq_put()
[SCSI] libsas: fix handling vacant phy in sas_set_ex_phy()
[SCSI] ibmvscsi: Fix slave_configure deadlock
[SCSI] qla2xxx: Update the driver version to 8.04.00.13-k.
[SCSI] qla2xxx: Remove debug code that msleeps for random duration.
[SCSI] qla2xxx: Update copyright dates information in LICENSE.qla2xxx file.
[SCSI] qla2xxx: Fix crash during firmware dump procedure.
[SCSI] Revert "qla2xxx: Add setting of driver version string for vendor application."
[SCSI] ipr: dlpar failed when adding an adapter back
[SCSI] ipr: fix addition of abort command to HRRQ free queue
[SCSI] st: Take additional queue ref in st_probe
[SCSI] libsas: use right function to alloc smp response
[SCSI] ipr: ipr_test_msi() fails when running with msi-x enabled adapter
Pull CIFS fix from Steve French:
"Fixes a regression in cifs in which a password which begins with a
comma is parsed incorrectly as a blank password"
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
cifs: Allow passwords which begin with a delimitor
As ftrace_filter_lseek is now used with ftrace_pid_fops, it needs to
be moved out of the #ifdef CONFIG_DYNAMIC_FTRACE section as the
ftrace_pid_fops is defined when DYNAMIC_FTRACE is not.
Cc: stable@vger.kernel.org
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Currently set_ftrace_pid and set_graph_function files use seq_lseek
for their fops. However seq_open() is called only for FMODE_READ in
the fops->open() so that if an user tries to seek one of those file
when she open it for writing, it sees NULL seq_file and then panic.
It can be easily reproduced with following command:
$ cd /sys/kernel/debug/tracing
$ echo 1234 | sudo tee -a set_ftrace_pid
In this example, GNU coreutils' tee opens the file with fopen(, "a")
and then the fopen() internally calls lseek().
Link: http://lkml.kernel.org/r/1365663302-2170-1-git-send-email-namhyung@kernel.org
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: stable@vger.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This contains a few small ASoC fixes (wm8903, wm5102, samsung-i2s,
tegra, and soc-compress) and an endian fix for NI USB-audio devices,
update for Mark's e-mail address.
No scary changes, AFAIS.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)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=JKpk
-----END PGP SIGNATURE-----
Merge tag 'sound-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"This contains a few small ASoC fixes (wm8903, wm5102, samsung-i2s,
tegra, and soc-compress) and an endian fix for NI USB-audio devices,
update for Mark's e-mail address.
No scary changes, AFAIS."
* tag 'sound-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
MAINTAINERS: Update e-mail address
ASoC: wm5102: Correct lookup of arizona struct in SYSCLK event
ASoC: wm8903: Fix the bypass to HP/LINEOUT when no DAC or ADC is running
ALSA: usb-audio: fix endianness bug in snd_nativeinstruments_*
ASoC: tegra: Don't claim to support PCM pause and resume
ASoC: Samsung: set drvdata before adding secondary device
ASoC: Samsung: return error if drvdata is not set
ASoC: compress: Cancel delayed power down if needed
ASoC: core: Fix to check return value of snd_soc_update_bits_locked()
The smpboot threads rely on the park/unpark mechanism which binds per
cpu threads on a particular core. Though the functionality is racy:
CPU0 CPU1 CPU2
unpark(T) wake_up_process(T)
clear(SHOULD_PARK) T runs
leave parkme() due to !SHOULD_PARK
bind_to(CPU2) BUG_ON(wrong CPU)
We cannot let the tasks move themself to the target CPU as one of
those tasks is actually the migration thread itself, which requires
that it starts running on the target cpu right away.
The solution to this problem is to prevent wakeups in park mode which
are not from unpark(). That way we can guarantee that the association
of the task to the target cpu is working correctly.
Add a new task state (TASK_PARKED) which prevents other wakeups and
use this state explicitly for the unpark wakeup.
Peter noticed: Also, since the task state is visible to userspace and
all the parked tasks are still in the PID space, its a good hint in ps
and friends that these tasks aren't really there for the moment.
The migration thread has another related issue.
CPU0 CPU1
Bring up CPU2
create_thread(T)
park(T)
wait_for_completion()
parkme()
complete()
sched_set_stop_task()
schedule(TASK_PARKED)
The sched_set_stop_task() call is issued while the task is on the
runqueue of CPU1 and that confuses the hell out of the stop_task class
on that cpu. So we need the same synchronizaion before
sched_set_stop_task().
Reported-by: Dave Jones <davej@redhat.com>
Reported-and-tested-by: Dave Hansen <dave@sr71.net>
Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
Acked-by: Peter Ziljstra <peterz@infradead.org>
Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: dhillf@gmail.com
Cc: Ingo Molnar <mingo@kernel.org>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1304091635430.21884@ionos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Update the e-mail address I use for subsystems.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=qSGU
-----END PGP SIGNATURE-----
Merge tag 'asoc-maintainers-v3.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
MAINTAINERS: Update e-mail address
Update the e-mail address I use for subsystems.
A few updates, more than I'd like, fixing some relatively small issues
but mostly driver specific ones. Nothing wildly exciting so if it
doesn't make v3.9 it won't be the end of the world but it'd be nice.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=W1XN
-----END PGP SIGNATURE-----
Merge tag 'asoc-v3.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Updates for v3.9
A few updates, more than I'd like, fixing some relatively small issues
but mostly driver specific ones. Nothing wildly exciting so if it
doesn't make v3.9 it won't be the end of the world but it'd be nice.
When CONFIG_DEBUG_PAGEALLOC is set page table updates made by
kernel_map_pages() are not made visible (via TLB flush)
immediately if lazy MMU is on. In environments that support lazy
MMU (e.g. Xen) this may lead to fatal page faults, for example,
when zap_pte_range() needs to allocate pages in
__tlb_remove_page() -> tlb_next_batch().
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: konrad.wilk@oracle.com
Link: http://lkml.kernel.org/r/1365703192-2089-1-git-send-email-boris.ostrovsky@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
If the pmd is not present, _PAGE_PSE will not be set anymore.
Fix the false positive.
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Stefan Bader <stefan.bader@canonical.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Borislav Petkov <bp@alien8.de>
Link: http://lkml.kernel.org/r/1365687369-30802-1-git-send-email-aarcange@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Driver's and ->fill_modes functions are allowed to grab crtc mutexes
(for e.g. load detect). Hence we need to first only grab the general
kms mutex, and only in a second step grab all locks to do the
modesets.
This prevents a deadlock on my gm45 in the tv load detect code called
by drm_helper_probe_single_connector_modes.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Pull slave-dmaengine fixes from Vinod Koul:
"The first one fixes issue in pl330 to check for DT compatible and
the second one fixes omap-dma to start without delay"
* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
dmaengine: omap-dma: Start DMA without delay for cyclic channels
DMA: PL330: Add check if device tree compatible
- System reboot/halt fix related to CPU offline ordering
from Huacai Chen.
- intel_pstate driver fix for a delay time computation error
occasionally crashing systems using it from Dirk Brandewie.
/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.19 (GNU/Linux)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=bkFT
-----END PGP SIGNATURE-----
Merge tag 'pm-3.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
- System reboot/halt fix related to CPU offline ordering from Huacai
Chen.
- intel_pstate driver fix for a delay time computation error
occasionally crashing systems using it from Dirk Brandewie.
* tag 'pm-3.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / reboot: call syscore_shutdown() after disable_nonboot_cpus()
cpufreq / intel_pstate: Set timer timeout correctly
This reverts commit bc8ce4 (regmap: don't corrupt work buffer in
_regmap_raw_write()) since it turns out that it can cause issues when
taken in isolation from the other changes in -next that lead to its
discovery. On the basis that nobody noticed the problems for quite some
time without that subsequent work let's drop it from v3.9.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=ROA6
-----END PGP SIGNATURE-----
Merge tag 'regmap-v3.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap revert from Mark Brown:
"regmap: Back out work buffer fix
This reverts commit bc8ce4 (regmap: don't corrupt work buffer in
_regmap_raw_write()) since it turns out that it can cause issues when
taken in isolation from the other changes in -next that lead to its
discovery. On the basis that nobody noticed the problems for quite
some time without that subsequent work let's drop it from v3.9."
* tag 'regmap-v3.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
regmap: Back out work buffer fix
Some important bug fixes that came in over the last 10 days,
mostly mvebu and imx:
- Multiple regressions on i.mx following the conversion of
the clock code, hopefully the last we are seeing of those.
- a regression in the mvebu irq handling code
- An incorrect register offset in the rewritten s3c24xx irq code.
- Two bugs in setting up the iomega_ix2_200 machine
- Turning on an extra bus clock on imx
- A MAINTAINERS file entry for Roland Stigge
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=J404
-----END PGP SIGNATURE-----
Merge tag 'arm-soc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC bug fixes from Arnd Bergmann:
"A little later during the week than the last few pull requests, since
there was very little that came in before 3.9-rc6. At least things
have calmed down again here.
Some important bug fixes that came in over the last 10 days, mostly
mvebu and imx:
- Multiple regressions on i.mx following the conversion of the clock
code, hopefully the last we are seeing of those.
- a regression in the mvebu irq handling code
- An incorrect register offset in the rewritten s3c24xx irq code.
- Two bugs in setting up the iomega_ix2_200 machine
- Turning on an extra bus clock on imx
- A MAINTAINERS file entry for Roland Stigge"
* tag 'arm-soc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
arm: mvebu: Fix the irq map function in SMP mode
Fix GE0/GE1 init on ix2-200 as GE0 has no PHY
ARM: S3C24XX: Fix interrupt pending register offset of the EINT controller
ARM: S3C24XX: Correct NR_IRQS definition for s3c2440
ARM i.MX6: Fix ldb_di clock selection
ARM: imx: provide twd clock lookup from device tree
ARM: imx35 Bugfix admux clock
ARM: clk-imx35: Bugfix iomux clock
ARM: mxs: Slow down the I2C clock speed
MAINTAINERS: Add maintainer for LPC32xx
ARM: Kirkwood: Fix typo in the definition of ix2-200 rebuild LED
The dereference to 'put_index' should be moved below the NULL test.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
We actually have to pass chip as the host_data parameter of
irq_domain_add_simple() as later on, it is used to initialize chip_data
in pca953x_gpio_irq_map(). Failing to do so is leading to a NULL pointer
dereference after calling irq_data_get_irq_chip_data() in
pca953x_irq_mask(), pca953x_irq_unmask(), pca953x_irq_bus_lock(),
pca953x_irq_bus_sync_unlock() and pca953x_irq_set_type().
Fixes regression introduced by commit
0e8f2fdacf (gpio: pca953x: use simple
irqdomain)
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Sarah Sharp
Linus Torvalds
Nicolas Ferre
Suleiman Souhlal
Josef Bacik
Dave Hansen
Steven Rostedt (Red Hat)
Namhyung Kim
Thomas Gleixner
Takashi Iwai
Mark Brown
Boris Ostrovsky
Andrea Arcangeli
Wei Yongjun
Daniel Vetter
Dave Airlie
Alexandre Belloni