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Sharon Dvir [Sun, 1 Feb 2015 21:47:32 +0000 (23:47 +0200)]
sched/Documentation: Remove unneeded word
The second 'mutex' shouldn't be there, it can't be about the mutex,
as the mutex can't be freed, but unlocked, the memory where the
mutex resides however, can be freed.
Signed-off-by: Sharon Dvir <sharon.dvir1@mail.huji.ac.il>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1422827252-31363-1-git-send-email-sharon.dvir1@mail.huji.ac.il
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Johan Hedberg [Fri, 30 Jan 2015 11:14:36 +0000 (13:14 +0200)]
sched/wait: Introduce wait_on_bit_timeout()
Add a new wait_on_bit_timeout() helper, basically the same as
wait_on_bit() except that it also takes a 'timeout' parameter.
All the building blocks like bit_wait_timeout() and
out_of_line_wait_on_bit_timeout() are already in place so the
addition is rather simple.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: davem@davemloft.net
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1422616476-2917-2-git-send-email-johan.hedberg@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Frederic Weisbecker [Wed, 28 Jan 2015 00:24:09 +0000 (01:24 +0100)]
sched: Pull resched loop to __schedule() callers
__schedule() disables preemption during its job and re-enables it
afterward without doing a preemption check to avoid recursion.
But if an event happens after the context switch which requires
rescheduling, we need to check again if a task of a higher priority
needs the CPU. A preempt irq can raise such a situation. To handle that,
__schedule() loops on need_resched().
But preempt_schedule_*() functions, which call __schedule(), also loop
on need_resched() to handle missed preempt irqs. Hence we end up with
the same loop happening twice.
Lets simplify that by attributing the need_resched() loop responsibility
to all __schedule() callers.
There is a risk that the outer loop now handles reschedules that used
to be handled by the inner loop with the added overhead of caller details
(inc/dec of PREEMPT_ACTIVE, irq save/restore) but assuming those inner
rescheduling loop weren't too frequent, this shouldn't matter. Especially
since the whole preemption path is now losing one loop in any case.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1422404652-29067-2-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Xunlei Pang [Mon, 19 Jan 2015 04:49:37 +0000 (04:49 +0000)]
sched/deadline: Remove cpu_active_mask from cpudl_find()
cpu_active_mask is rarely changed (only on hotplug), so remove this
operation to gain a little performance.
If there is a change in cpu_active_mask, rq_online_dl() and
rq_offline_dl() should take care of it normally, so cpudl::free_cpus
carries enough information for us.
For the rare case when a task is put onto a dying cpu (which
rq_offline_dl() can't handle in a timely fashion), it will be
handled through _cpu_down()->...->multi_cpu_stop()->migration_call()
->migrate_tasks(), preventing the task from hanging on the
dead cpu.
Cc: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
[peterz: changelog]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1421642980-10045-2-git-send-email-pang.xunlei@linaro.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Wanpeng Li [Wed, 26 Nov 2014 00:44:06 +0000 (08:44 +0800)]
sched: Fix hrtick_start() on UP
The commit
177ef2a6315e ("sched/deadline: Fix a precision problem in
the microseconds range") forgot to change the UP version of
hrtick_start(), do so now.
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Fixes:
177ef2a6315e ("sched/deadline: Fix a precision problem in the microseconds range")
[ Fixed the changelog. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Kirill Tkhai <ktkhai@parallels.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1416962647-76792-7-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Wanpeng Li [Wed, 26 Nov 2014 00:44:04 +0000 (08:44 +0800)]
sched/deadline: Avoid pointless __setscheduler()
There is no need to dequeue/enqueue and push/pull if there are
no scheduling parameters changed for the DL class.
Both fair and RT classes already check if parameters changed for
them to avoid unnecessary overhead. This patch add the parameters
changed test for the DL class in order to reduce overhead.
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
[ Fixed up the changelog. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Kirill Tkhai <ktkhai@parallels.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1416962647-76792-5-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Peter Zijlstra [Wed, 26 Nov 2014 00:44:03 +0000 (08:44 +0800)]
sched/deadline: Fix stale yield state
When we fail to start the deadline timer in update_curr_dl(), we
forget to clear ->dl_yielded, resulting in wrecked time keeping.
Since the natural place to clear both ->dl_yielded and ->dl_throttled
is in replenish_dl_entity(); both are after all waiting for that event;
make it so.
Luckily since
67dfa1b756f2 ("sched/deadline: Implement
cancel_dl_timer() to use in switched_from_dl()") the
task_on_rq_queued() condition in dl_task_timer() must be true, and can
therefore call enqueue_task_dl() unconditionally.
Reported-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Kirill Tkhai <ktkhai@parallels.com>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1416962647-76792-4-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Wanpeng Li [Wed, 26 Nov 2014 00:44:01 +0000 (08:44 +0800)]
sched/deadline: Fix hrtick for a non-leftmost task
After update_curr_dl() the current task might not be the leftmost task
anymore. In that case do not start a new hrtick for it.
In this case NEED_RESCHED will be set and the next schedule will start
the hrtick for the new task if and when appropriate.
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Acked-by: Juri Lelli <juri.lelli@arm.com>
[ Rewrote the changelog and comment. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Kirill Tkhai <ktkhai@parallels.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1416962647-76792-2-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Wed, 4 Feb 2015 06:44:00 +0000 (07:44 +0100)]
Merge branch 'sched/urgent' into sched/core, to merge fixes before applying new patches
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Peter Zijlstra [Wed, 28 Jan 2015 14:08:03 +0000 (15:08 +0100)]
sched/deadline: Fix deadline parameter modification handling
Commit
67dfa1b756f2 ("sched/deadline: Implement cancel_dl_timer() to
use in switched_from_dl()") removed the hrtimer_try_cancel() function
call out from init_dl_task_timer(), which gets called from
__setparam_dl().
The result is that we can now re-init the timer while its active --
this is bad and corrupts timer state.
Furthermore; changing the parameters of an active deadline task is
tricky in that you want to maintain guarantees, while immediately
effective change would allow one to circumvent the CBS guarantees --
this too is bad, as one (bad) task should not be able to affect the
others.
Rework things to avoid both problems. We only need to initialize the
timer once, so move that to __sched_fork() for new tasks.
Then make sure __setparam_dl() doesn't affect the current running
state but only updates the parameters used to calculate the next
scheduling period -- this guarantees the CBS functions as expected
(albeit slightly pessimistic).
This however means we need to make sure __dl_clear_params() needs to
reset the active state otherwise new (and tasks flipping between
classes) will not properly (re)compute their first instance.
Todo: close class flipping CBS hole.
Todo: implement delayed BW release.
Reported-by: Luca Abeni <luca.abeni@unitn.it>
Acked-by: Juri Lelli <juri.lelli@arm.com>
Tested-by: Luca Abeni <luca.abeni@unitn.it>
Fixes:
67dfa1b756f2 ("sched/deadline: Implement cancel_dl_timer() to use in switched_from_dl()")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Cc: Kirill Tkhai <tkhai@yandex.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20150128140803.GF23038@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Mikulas Patocka [Mon, 2 Feb 2015 14:39:02 +0000 (09:39 -0500)]
sched/wait: Remove might_sleep() from wait_event_cmd()
The patch
e22b886a8a43 ("sched/wait: Add might_sleep() checks")
introduced a bug in the raid5 subsystem.
The function raid5_quiesce() (and resize_stripes()) uses the 'cmd'
part to release and acquire a spinlock (so we call the sleep
primitives in atomic context), and therefore we cannot do the
might_sleep() check.
Remove it.
Fixes:
e22b886a8a43 ("sched/wait: Add might_sleep() checks")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/alpine.LRH.2.02.1502020935580.13510@file01.intranet.prod.int.rdu2.redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Xunlei Pang [Mon, 19 Jan 2015 04:49:36 +0000 (04:49 +0000)]
sched/deadline: Modify cpudl::free_cpus to reflect rd->online
Currently, cpudl::free_cpus contains all CPUs during init, see
cpudl_init(). When calling cpudl_find(), we have to add rd->span
to avoid selecting the cpu outside the current root domain, because
cpus_allowed cannot be depended on when performing clustered
scheduling using the cpuset, see find_later_rq().
This patch adds cpudl_set_freecpu() and cpudl_clear_freecpu() for
changing cpudl::free_cpus when doing rq_online_dl()/rq_offline_dl(),
so we can avoid the rd->span operation when calling cpudl_find()
in find_later_rq().
Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1421642980-10045-1-git-send-email-pang.xunlei@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Preeti U Murthy [Wed, 21 Jan 2015 10:57:25 +0000 (16:27 +0530)]
sched/idle: Add missing checks to the exit condition of cpu_idle_poll()
cpu_idle_poll() is entered into when either the cpu_idle_force_poll is set or
tick_check_broadcast_expired() returns true. The exit condition from
cpu_idle_poll() is tif_need_resched().
However this does not take into account scenarios where cpu_idle_force_poll
changes or tick_check_broadcast_expired() returns false, without setting
the resched flag. So a cpu will be caught in cpu_idle_poll() needlessly,
thereby wasting power. Add an explicit check on cpu_idle_force_poll and
tick_check_broadcast_expired() to the exit condition of cpu_idle_poll()
to avoid this.
Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20150121105655.15279.59626.stgit@preeti.in.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Frederic Weisbecker [Thu, 22 Jan 2015 17:08:04 +0000 (18:08 +0100)]
sched: Fix missing preemption opportunity
If an interrupt fires in cond_resched(), between the call to __schedule()
and the PREEMPT_ACTIVE count decrementation, and that interrupt sets
TIF_NEED_RESCHED, the call to preempt_schedule_irq() will be ignored
due to the PREEMPT_ACTIVE count. This kind of scenario, with irq preemption
being delayed because it's interrupting a preempt-disabled area, is
usually fixed up after preemption is re-enabled back with an explicit
call to preempt_schedule().
This is what preempt_enable() does but a raw preempt count decrement as
performed by __preempt_count_sub(PREEMPT_ACTIVE) doesn't handle delayed
preemption check. Therefore when such a race happens, the rescheduling
is going to be delayed until the next scheduler or preemption entrypoint.
This can be a problem for scheduler latency sensitive workloads.
Lets fix that by consolidating cond_resched() with preempt_schedule()
internals.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Ingo Molnar <mingo@kernel.org>
Original-patch-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1421946484-9298-1-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tim Chen [Fri, 12 Dec 2014 23:38:12 +0000 (15:38 -0800)]
sched/rt: Reduce rq lock contention by eliminating locking of non-feasible target
This patch adds checks that prevens futile attempts to move rt tasks
to a CPU with active tasks of equal or higher priority.
This reduces run queue lock contention and improves the performance of
a well known OLTP benchmark by 0.7%.
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Shawn Bohrer <sbohrer@rgmadvisors.com>
Cc: Suruchi Kadu <suruchi.a.kadu@intel.com>
Cc: Doug Nelson<doug.nelson@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1421430374.2399.27.camel@schen9-desk2.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Fri, 30 Jan 2015 18:28:36 +0000 (19:28 +0100)]
Merge branch 'sched/urgent' into sched/core
Merge all pending fixes and refresh the tree, before applying new changes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Mike Galbraith [Wed, 28 Jan 2015 03:53:55 +0000 (04:53 +0100)]
sched: Fix crash if cpuset_cpumask_can_shrink() is passed an empty cpumask
While creating an exclusive cpuset, we passed cpuset_cpumask_can_shrink()
an empty cpumask (cur), and dl_bw_of(cpumask_any(cur)) made boom with it:
CPU: 0 PID: 6942 Comm: shield.sh Not tainted 3.19.0-master #19
Hardware name: MEDIONPC MS-7502/MS-7502, BIOS 6.00 PG 12/26/2007
task:
ffff880224552450 ti:
ffff8800caab8000 task.ti:
ffff8800caab8000
RIP: 0010:[<
ffffffff81073846>] [<
ffffffff81073846>] cpuset_cpumask_can_shrink+0x56/0xb0
[...]
Call Trace:
[<
ffffffff810cb82a>] validate_change+0x18a/0x200
[<
ffffffff810cc877>] cpuset_write_resmask+0x3b7/0x720
[<
ffffffff810c4d58>] cgroup_file_write+0x38/0x100
[<
ffffffff811d953a>] kernfs_fop_write+0x12a/0x180
[<
ffffffff8116e1a3>] vfs_write+0xb3/0x1d0
[<
ffffffff8116ed06>] SyS_write+0x46/0xb0
[<
ffffffff8159ced6>] system_call_fastpath+0x16/0x1b
Signed-off-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Acked-by: Zefan Li <lizefan@huawei.com>
Fixes:
f82f80426f7a ("sched/deadline: Ensure that updates to exclusive cpusets don't break AC")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1422417235.5716.5.camel@marge.simpson.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Jan Beulich [Fri, 23 Jan 2015 08:25:38 +0000 (08:25 +0000)]
sched/fair: Avoid using uninitialized variable in preferred_group_nid()
At least some gcc versions - validly afaict - warn about potentially
using max_group uninitialized: There's no way the compiler can prove
that the body of the conditional where it and max_faults get set/
updated gets executed; in fact, without knowing all the details of
other scheduler code, I can't prove this either.
Generally the necessary change would appear to be to clear max_group
prior to entering the inner loop, and break out of the outer loop when
it ends up being all clear after the inner one. This, however, seems
inefficient, and afaict the same effect can be achieved by exiting the
outer loop when max_faults is still zero after the inner loop.
[ mingo: changed the solution to zero initialization: uninitialized_var()
needs to die, as it's an actively dangerous construct: if in the future
a known-proven-good piece of code is changed to have a true, buggy
uninitialized variable, the compiler warning is then supressed...
The better long term solution is to clean up the code flow, so that
even simple minded compilers (and humans!) are able to read it without
getting a headache. ]
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/54C2139202000078000588F7@mail.emea.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linus Torvalds [Tue, 27 Jan 2015 00:25:42 +0000 (16:25 -0800)]
Merge branch 'akpm' (patches from Andrew Morton)
Merge misc fixes from Andrew Morton:
"Six fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
drivers/rtc/rtc-s5m.c: terminate s5m_rtc_id array with empty element
printk: add dummy routine for when CONFIG_PRINTK=n
mm/vmscan: fix highidx argument type
memcg: remove extra newlines from memcg oom kill log
x86, build: replace Perl script with Shell script
mm: page_alloc: embed OOM killing naturally into allocation slowpath
Linus Torvalds [Mon, 26 Jan 2015 23:17:34 +0000 (15:17 -0800)]
Merge branch 'for-3.19-fixes' of git://git./linux/kernel/git/tj/cgroup
Pull cgroup fix from Tejun Heo:
"The lifetime rules of cgroup hierarchies always have been somewhat
counter-intuitive and cgroup core tried to enforce that hierarchies
w/o userland-visible usages must die in finite amount of time so that
the controllers can be reused for other hierarchies; unfortunately,
this can't be implemented reasonably for the memory controller - the
kmemcg part doesn't have any way to forcefully drain the existing
usages, leading to an interruptible hang if a following mount attempts
to use the controller in any way.
So, it seems like we're stuck with "hierarchies live on till they die
whenever that may be" at least for now. This pretty much confines
attaching controllers to hierarchies to before the hierarchies are
actively used by making dynamic configurations post active usages
unreliable. This has never been reliable and should be fine in
practice given how cgroups are used.
After the patch, hierarchies aren't killed if it isn't already
drained. A following mount attempt of the same mount options will
reuse the existing hierarchy. Mount attempts with differing options
will fail w/ -EBUSY"
* 'for-3.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: prevent mount hang due to memory controller lifetime
Linus Torvalds [Mon, 26 Jan 2015 22:52:08 +0000 (14:52 -0800)]
Merge tag 'regulator-v3.19-rc6' of git://git./linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"One correctness fix here for the s2mps11 driver which would have
resulted in some of the regulators being completely broken together
with a fix for locking in regualtor_put() (which is fortunately rarely
called at all in practical systems)"
* tag 'regulator-v3.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: s2mps11: Fix wrong calculation of register offset
regulator: core: fix race condition in regulator_put()
Linus Torvalds [Mon, 26 Jan 2015 22:51:19 +0000 (14:51 -0800)]
Merge tag 'spi-v3.19-rc6' of git://git./linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A few driver specific fixes here, some fixes for issues introduced and
discovered during recent work on the DesignWare driver (which has been
getting a lot of attention recently) and a couple of other drivers.
All serious things for people who run into them"
* tag 'spi-v3.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: dw: amend warning message
spi: sh-msiof: fix MDR1_FLD_MASK value
spi: dw-mid: fix FIFO size
spi: dw: Fix detecting FIFO depth
spi/pxa2xx: Clear cur_chip pointer before starting next message
Andrey Ryabinin [Mon, 26 Jan 2015 20:58:46 +0000 (12:58 -0800)]
drivers/rtc/rtc-s5m.c: terminate s5m_rtc_id array with empty element
Array of platform_device_id elements should be terminated with empty
element.
Fixes:
5bccae6ec458 ("rtc: s5m-rtc: add real-time clock driver for s5m8767")
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pranith Kumar [Mon, 26 Jan 2015 20:58:43 +0000 (12:58 -0800)]
printk: add dummy routine for when CONFIG_PRINTK=n
There are missing dummy routines for log_buf_addr_get() and
log_buf_len_get() for when CONFIG_PRINTK is not set causing build
failures.
This patch adds these dummy routines at the appropriate location.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Petr Mladek <pmladek@suse.cz>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Michael S. Tsirkin [Mon, 26 Jan 2015 20:58:41 +0000 (12:58 -0800)]
mm/vmscan: fix highidx argument type
for_each_zone_zonelist_nodemask wants an enum zone_type argument, but is
passed gfp_t:
mm/vmscan.c:2658:9: expected int enum zone_type [signed] highest_zoneidx
mm/vmscan.c:2658:9: got restricted gfp_t [usertype] gfp_mask
mm/vmscan.c:2658:9: warning: incorrect type in argument 2 (different base types)
mm/vmscan.c:2658:9: expected int enum zone_type [signed] highest_zoneidx
mm/vmscan.c:2658:9: got restricted gfp_t [usertype] gfp_mask
convert argument to the correct type.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Suleiman Souhlal <suleiman@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Greg Thelen [Mon, 26 Jan 2015 20:58:38 +0000 (12:58 -0800)]
memcg: remove extra newlines from memcg oom kill log
Commit
e61734c55c24 ("cgroup: remove cgroup->name") added two extra
newlines to memcg oom kill log messages. This makes dmesg hard to read
and parse. The issue affects 3.15+.
Example:
Task in /t <<< extra #1
killed as a result of limit of /t
<<< extra #2
memory: usage 102400kB, limit 102400kB, failcnt 274712
Remove the extra newlines from memcg oom kill messages, so the messages
look like:
Task in /t killed as a result of limit of /t
memory: usage 102400kB, limit 102400kB, failcnt 240649
Fixes:
e61734c55c24 ("cgroup: remove cgroup->name")
Signed-off-by: Greg Thelen <gthelen@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kees Cook [Mon, 26 Jan 2015 20:58:35 +0000 (12:58 -0800)]
x86, build: replace Perl script with Shell script
Commit
e6023367d779 ("x86, kaslr: Prevent .bss from overlaping initrd")
added Perl to the required build environment. This reimplements in
shell the Perl script used to find the size of the kernel with bss and
brk added.
Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Rob Landley <rob@landley.net>
Acked-by: Rob Landley <rob@landley.net>
Cc: Anca Emanuel <anca.emanuel@gmail.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Junjie Mao <eternal.n08@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Johannes Weiner [Mon, 26 Jan 2015 20:58:32 +0000 (12:58 -0800)]
mm: page_alloc: embed OOM killing naturally into allocation slowpath
The OOM killing invocation does a lot of duplicative checks against the
task's allocation context. Rework it to take advantage of the existing
checks in the allocator slowpath.
The OOM killer is invoked when the allocator is unable to reclaim any
pages but the allocation has to keep looping. Instead of having a check
for __GFP_NORETRY hidden in oom_gfp_allowed(), just move the OOM
invocation to the true branch of should_alloc_retry(). The __GFP_FS
check from oom_gfp_allowed() can then be moved into the OOM avoidance
branch in __alloc_pages_may_oom(), along with the PF_DUMPCORE test.
__alloc_pages_may_oom() can then signal to the caller whether the OOM
killer was invoked, instead of requiring it to duplicate the order and
high_zoneidx checks to guess this when deciding whether to continue.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mark Brown [Mon, 26 Jan 2015 11:16:27 +0000 (11:16 +0000)]
Merge remote-tracking branches 'spi/fix/dw', 'spi/fix/msiof' and 'spi/fix/pxa2xx' into spi-linus
Linus Torvalds [Mon, 26 Jan 2015 04:04:41 +0000 (20:04 -0800)]
Linux 3.19-rc6
Linus Torvalds [Mon, 26 Jan 2015 02:11:17 +0000 (18:11 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"Hopefully the last round of fixes for 3.19
- regression fix for the LDT changes
- regression fix for XEN interrupt handling caused by the APIC
changes
- regression fixes for the PAT changes
- last minute fixes for new the MPX support
- regression fix for 32bit UP
- fix for a long standing relocation issue on 64bit tagged for stable
- functional fix for the Hyper-V clocksource tagged for stable
- downgrade of a pr_err which tends to confuse users
Looks a bit on the large side, but almost half of it are valuable
comments"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/tsc: Change Fast TSC calibration failed from error to info
x86/apic: Re-enable PCI_MSI support for non-SMP X86_32
x86, mm: Change cachemode exports to non-gpl
x86, tls: Interpret an all-zero struct user_desc as "no segment"
x86, tls, ldt: Stop checking lm in LDT_empty
x86, mpx: Strictly enforce empty prctl() args
x86, mpx: Fix potential performance issue on unmaps
x86, mpx: Explicitly disable 32-bit MPX support on 64-bit kernels
x86, hyperv: Mark the Hyper-V clocksource as being continuous
x86: Don't rely on VMWare emulating PAT MSR correctly
x86, irq: Properly tag virtualization entry in /proc/interrupts
x86, boot: Skip relocs when load address unchanged
x86/xen: Override ACPI IRQ management callback __acpi_unregister_gsi
ACPI: pci: Do not clear pci_dev->irq in acpi_pci_irq_disable()
x86/xen: Treat SCI interrupt as normal GSI interrupt
Linus Torvalds [Mon, 26 Jan 2015 02:07:01 +0000 (18:07 -0800)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"From the irqchip departement you get:
- regression fix for omap-intc
- regression fix for atmel-aic-common
- functional correctness fix for hip04
- type mismatch fix for gic-v3-its
- proper error pointer check for mtd-sysirq
Mostly one and two liners except for the omap regression fix which is
slightly larger than desired"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip: atmel-aic-common: Prevent clobbering of priority when changing IRQ type
irqchip: omap-intc: Fix legacy DMA regression
irqchip: gic-v3-its: Fix use of max with decimal constant
irqchip: hip04: Initialize hip04_cpu_map to 0xffff
irqchip: mtk-sysirq: Use IS_ERR() instead of NULL pointer check
Linus Torvalds [Mon, 26 Jan 2015 01:47:34 +0000 (17:47 -0800)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"A set of small fixes:
- regression fix for exynos_mct clocksource
- trivial build fix for kona clocksource
- functional one liner fix for the sh_tmu clocksource
- two validation fixes to prevent (root only) data corruption in the
kernel via settimeofday and adjtimex. Tagged for stable"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time: adjtimex: Validate the ADJ_FREQUENCY values
time: settimeofday: Validate the values of tv from user
clocksource: sh_tmu: Set cpu_possible_mask to fix SMP broadcast
clocksource: kona: fix __iomem annotation
clocksource: exynos_mct: Fix bitmask regression for exynos4_mct_write
Linus Torvalds [Mon, 26 Jan 2015 01:29:06 +0000 (17:29 -0800)]
Merge tag 'armsoc-for-linus' of git://git./linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"A week's worth of fixes for various ARM platforms. Diff wise, the
largest fix is for OMAP to deal with how GIC now registers interrupts
(irq_domain_add_legacy() -> irq_domain_add_linear() changes).
Besides this, a few more renesas platforms needed the GIC instatiation
done for legacy boards. There's also a fix that disables coherency of
mvebu due to issues, and a few other smaller fixes"
* tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
arm64: dts: add baud rate to Juno stdout-path
ARM: dts: imx25: Fix PWM "per" clocks
bus: mvebu-mbus: fix support of MBus window 13
Merge tag 'mvebu-fixes-3.19-3' of git://git.infradead.org/linux-mvebu into fixes
ARM: mvebu: completely disable hardware I/O coherency
ARM: OMAP: Work around hardcoded interrupts
ARM: shmobile: r8a7779: Instantiate GIC from C board code in legacy builds
ARM: shmobile: r8a7778: Instantiate GIC from C board code in legacy builds
arm: boot: dts: dra7: enable dwc3 suspend PHY quirk
Linus Torvalds [Mon, 26 Jan 2015 01:27:18 +0000 (17:27 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
"A couple of fixes - deadlock in CIFS and build breakage in cris serial
driver (resurfaced f_dentry in there)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
VFS: Convert file->f_dentry->d_inode to file_inode()
fix deadlock in cifs_ioctl_clone()
Linus Torvalds [Mon, 26 Jan 2015 01:25:01 +0000 (17:25 -0800)]
Merge tag 'dm-3.19-fixes-2' of git://git./linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
"Two stable fixes for dm-cache and one 3.19 DM core fix:
- fix potential for dm-cache metadata corruption via stale metadata
buffers being used when switching an inactive cache table to
active; this could occur due to each table having it's own bufio
client rather than sharing the client between tables.
- fix dm-cache target to properly account for discard IO while
suspending otherwise IO quiescing could complete prematurely.
- fix DM core's handling of multiple internal suspends by maintaining
an 'internal_suspend_count' and only resuming the device when this
count drops to zero"
* tag 'dm-3.19-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm: fix handling of multiple internal suspends
dm cache: fix problematic dual use of a single migration count variable
dm cache: share cache-metadata object across inactive and active DM tables
Linus Torvalds [Mon, 26 Jan 2015 01:23:34 +0000 (17:23 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull two block layer fixes from Jens Axboe:
"Two small patches that should make it into 3.19:
- a fixup from me for NVMe, making the cq_vector a signed variable.
Otherwise our -1 comparison fails, and commit
2b25d981790b doesn't
do what it was supposed to.
- a fixup for the hotplug handling for blk-mq from Ming Lei, using
the proper kobject referencing to ensure we release resources at
the right time"
* 'for-linus' of git://git.kernel.dk/linux-block:
blk-mq: fix hctx/ctx kobject use-after-free
NVMe: cq_vector should be signed
Linus Torvalds [Sat, 24 Jan 2015 22:52:30 +0000 (14:52 -0800)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi
pULL SCSI fixes from James Bottomley:
"This consists of four real fixes and three MAINTAINER updates.
Three of the fixes are obvious (the DIX and atomic allocation are bug
on and warn on fixes and the other is just trivial) and the ipr one is
a bit more involved but is required because without it, the card
double completes aborted commands and causes a kernel oops"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
MAINTAINERS: ibmvscsi driver maintainer change
MAINTAINERS: ibmvfc driver maintainer change
MAINTAINERS: Remove self as isci maintainer
scsi_debug: test always evaluates to false, || should be used instead
scsi: Avoid crashing if device uses DIX but adapter does not support it
scsi_debug: use atomic allocation in resp_rsup_opcodes
ipr: wait for aborted command responses
Linus Torvalds [Sat, 24 Jan 2015 22:47:24 +0000 (14:47 -0800)]
Merge git://www.linux-watchdog.org/linux-watchdog
Pull watchdog fixes from Wim Van Sebroeck:
"This will fix reboot issues with the imx2_wdt driver and it also drops
some forgotten owner assignments from platform_drivers"
* git://www.linux-watchdog.org/linux-watchdog:
watchdog: drop owner assignment from platform_drivers
watchdog: imx2_wdt: Disable power down counter on boot
watchdog: imx2_wdt: Improve power management support.
Linus Torvalds [Sat, 24 Jan 2015 22:37:31 +0000 (14:37 -0800)]
Merge branch 'hwmon-for-linus' of git://git./linux/kernel/git/jdelvare/staging
Pull hwmon update from Jean Delvare:
"This contains a single thing: a new driver for the temperature sensor
embedded in the Intel 5500/5520/X58 chipsets.
Sorry for the late request, it's been so long since I last sent a pull
request and I've been so busy with other tasks meanwhile that I simply
forgot about these patches. But given that this is a new driver, it
can't introduce any regression so I thought it could still be OK.
This has been in linux-next for months now"
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
hwmon: (i5500_temp) Convert to use ATTRIBUTE_GROUPS macro
hwmon: (i5500_temp) Convert to module_pci_driver
hwmon: (i5500_temp) Don't bind to disabled sensors
hwmon: (i5500_temp) Convert to devm_hwmon_device_register_with_groups
hwmon: (i5500_temp) New driver for the Intel 5500/5520/X58 chipsets
Linus Torvalds [Sat, 24 Jan 2015 22:34:54 +0000 (14:34 -0800)]
Merge tag 'media/v3.19-4' of git://git./linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
- fix some race conditions caused by a regression on videobuf2
- fix a interrupt release bug on cx23885
- fix support for Mygica T230 and HVR4400
- fix compilation breakage when USB is not selected on tlg2300
- fix capabilities report on ompa3isp, soc-camera, rcar_vin and
pvrusb2
* tag 'media/v3.19-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
[media] omap3isp: Correctly set QUERYCAP capabilities
[media] cx23885: fix free interrupt bug
[media] pvrusb2: fix missing device_caps in querycap
[media] vb2: fix vb2_thread_stop race conditions
[media] rcar_vin: Update device_caps and capabilities in querycap
[media] soc-camera: fix device capabilities in multiple camera host drivers
[media] Fix Mygica T230 support
[media] cx23885: Split Hauppauge WinTV Starburst from HVR4400 card entry
[media] tlg2300: Fix media dependencies
Mikulas Patocka [Thu, 8 Jan 2015 23:52:26 +0000 (18:52 -0500)]
dm: fix handling of multiple internal suspends
Commit
ffcc393641 ("dm: enhance internal suspend and resume interface")
attempted to handle multiple internal suspends on the same device, but
it did that incorrectly. When these functions are called in this order
on the same device the device is no longer suspended, but it should be:
dm_internal_suspend_noflush
dm_internal_suspend_noflush
dm_internal_resume
Fix this bug by maintaining an 'internal_suspend_count' and resuming
the device when this count drops to zero.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Axel Lin [Sat, 24 Jan 2015 13:16:22 +0000 (14:16 +0100)]
hwmon: (i5500_temp) Convert to use ATTRIBUTE_GROUPS macro
Use ATTRIBUTE_GROUPS macro to simplify the code a bit.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Axel Lin [Sat, 24 Jan 2015 13:16:22 +0000 (14:16 +0100)]
hwmon: (i5500_temp) Convert to module_pci_driver
Use module_pci_driver to simplify the code a bit.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Jean Delvare [Sat, 24 Jan 2015 13:16:21 +0000 (14:16 +0100)]
hwmon: (i5500_temp) Don't bind to disabled sensors
On many motherboards, for an unknown reason, the thermal sensor seems
to be disabled and will return a constant temperature value of 36.5
degrees Celsius. Don't bind to the device in that case, so that we
don't report this bogus value to userspace.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Romain Dolbeau <romain@dolbeau.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Jean Delvare [Sat, 24 Jan 2015 13:16:21 +0000 (14:16 +0100)]
hwmon: (i5500_temp) Convert to devm_hwmon_device_register_with_groups
Use devm_hwmon_device_register_with_groups() to simplify the code a
bit.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Romain Dolbeau <romain@dolbeau.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Jean Delvare [Sat, 24 Jan 2015 13:16:21 +0000 (14:16 +0100)]
hwmon: (i5500_temp) New driver for the Intel 5500/5520/X58 chipsets
The Intel 5500, 5520 and X58 chipsets embed a digital thermal sensor.
This new driver supports it.
Note that on many boards the sensor seems to be disabled and reports
the minimum value (36.5 degrees Celsius) all the time.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Tested-by: Romain Dolbeau <romain@dolbeau.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Linus Torvalds [Sat, 24 Jan 2015 02:31:27 +0000 (14:31 +1200)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"We have a few fixes in my for-linus branch.
Qu Wenruo's batch fix a regression between some our merge window pull
and the inode_cache feature. The rest are smaller bugs"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: Don't call btrfs_start_transaction() on frozen fs to avoid deadlock.
btrfs: Fix the bug that fs_info->pending_changes is never cleared.
btrfs: fix state->private cast on 32 bit machines
Btrfs: fix race deleting block group from space_info->ro_bgs list
Btrfs: fix incorrect freeing in scrub_stripe
btrfs: sync ioctl, handle errors after transaction start
Linus Torvalds [Fri, 23 Jan 2015 23:26:13 +0000 (11:26 +1200)]
Merge tag 'platform-drivers-x86-v3.19-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
Pull platform driver fix from Darren Hart:
"Revert keyboard backlight sysfs support and documentation.
The support for the dell-laptop keyboard backlight was flawed and the
fix:
https://lkml.org/lkml/2015/1/14/539
was more invasive that I felt comfortable sending at RC5.
This series reverts the support for the dell-laptop keyboard backlight
as well as the documentation for the newly created sysfs attributes.
We'll get this implemented correctly for 3.20"
* tag 'platform-drivers-x86-v3.19-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
Revert "platform: x86: dell-laptop: Add support for keyboard backlight"
Revert "Documentation: Add entry for dell-laptop sysfs interface"
Linus Torvalds [Fri, 23 Jan 2015 22:58:47 +0000 (10:58 +1200)]
Merge tag 'pci-v3.19-fixes-1' of git://git./linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
"These are fixes for:
- a resource management problem that causes a Radeon "Fatal error
during GPU init" on machines where the BIOS programmed an invalid
Root Port window. This was a regression in v3.16.
- an Atheros AR93xx device that doesn't handle PCI bus resets
correctly. This was a regression in v3.14.
- an out-of-date email address"
* tag 'pci-v3.19-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
MAINTAINERS: Update Richard Zhu's email address
sparc/PCI: Clip bridge windows to fit in upstream windows
powerpc/PCI: Clip bridge windows to fit in upstream windows
parisc/PCI: Clip bridge windows to fit in upstream windows
mn10300/PCI: Clip bridge windows to fit in upstream windows
microblaze/PCI: Clip bridge windows to fit in upstream windows
ia64/PCI: Clip bridge windows to fit in upstream windows
frv/PCI: Clip bridge windows to fit in upstream windows
alpha/PCI: Clip bridge windows to fit in upstream windows
x86/PCI: Clip bridge windows to fit in upstream windows
PCI: Add pci_claim_bridge_resource() to clip window if necessary
PCI: Add pci_bus_clip_resource() to clip to fit upstream window
PCI: Pass bridge device, not bus, when updating bridge windows
PCI: Mark Atheros AR93xx to avoid bus reset
PCI: Add flag for devices where we can't use bus reset
Linus Torvalds [Fri, 23 Jan 2015 22:55:05 +0000 (10:55 +1200)]
Merge tag 'devicetree-for-linus' of git://git./linux/kernel/git/glikely/linux
Pull devicetree bug fixes and documentation updates from Grant Likely:
"A few bugfixes for the new DT overlay feature, documentation updates,
spelling corrections, and changes to MAINTAINERS. Nothing earth
shattering here"
* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux:
of/unittest: Overlays with sub-devices tests
of/platform: Handle of_populate drivers in notifier
of/overlay: Do not generate duplicate nodes
devicetree: document the "qemu" and "virtio" vendor prefixes
devicetree: document ARM bindings for QEMU's Firmware Config interface
Documentation: of: fix typo in graph bindings
dma-mapping: fix debug print to display correct dma_pfn_offset
of: replace Asahi Kasei Corp vendor prefix
ARM: dt: GIC: Spelling s/specific/specifier/, s/flaggs/flags/
dt/bindings: arm-boards: Spelling s/pointong/pointing/
MAINTAINERS: Update DT website and git repository
MAINTAINERS: drop DT regex matching on of_get_property and of_match_table
Olof Johansson [Fri, 23 Jan 2015 22:23:40 +0000 (14:23 -0800)]
Merge tag 'imx-fixes-3.19-2' of git://git./linux/kernel/git/shawnguo/linux into fixes
Merge "ARM: imx: fixes for 3.19, 2nd round" from Shawn Guo:
The i.MX fixes for 3.19, 2nd round:
- Correct pwm clock assignment in i.MX25 device tree to fix the broken
pwm support on i.MX25
* tag 'imx-fixes-3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
ARM: dts: imx25: Fix PWM "per" clocks
Signed-off-by: Olof Johansson <olof@lixom.net>
Robin Murphy [Thu, 22 Jan 2015 11:21:32 +0000 (11:21 +0000)]
arm64: dts: add baud rate to Juno stdout-path
Without explicit command-line parameters, the Juno UART ends up running
at 57600 baud in the kernel, which is at odds with the 115200 baud used
by the rest of the firmware. Since commit
7914a7c5651a5161 now lets us
fix this by specifying default options in stdout-path, do so.
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Olof Johansson [Fri, 23 Jan 2015 22:08:13 +0000 (14:08 -0800)]
Merge tag 'mvebu-fixes-3.19-4' of git://git.infradead.org/linux-mvebu into fixes
Merge "mvebu/fixes #3" from Andrew Lunn:
mvebu fixes for 3.19. (Part 4)
bus: mvebu-mbus: fix support of MBus window 13
* tag 'mvebu-fixes-3.19-4' of git://git.infradead.org/linux-mvebu:
bus: mvebu-mbus: fix support of MBus window 13
ARM: mvebu: completely disable hardware I/O coherency
Signed-off-by: Olof Johansson <olof@lixom.net>
Linus Torvalds [Fri, 23 Jan 2015 21:58:17 +0000 (09:58 +1200)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"Three small fixes.
Two for x86 and one avoids that sparse bails out"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: SYSENTER emulation is broken
KVM: x86: Fix of previously incomplete fix for CVE-2014-8480
KVM: fix sparse warning in include/trace/events/kvm.h
Linus Torvalds [Fri, 23 Jan 2015 21:57:01 +0000 (09:57 +1200)]
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
"Another round of small ARM fixes.
restore_user_regs early stack deallocation is buggy in the presence of
FIQs which switch to SVC mode, and could lead to corrupted registers
being returned to a user process given an inopportune FIQ event.
Another bug was spotted in the ARM perf code where it could lose track
of perf counter overflows, leading to incorrect perf results.
Lastly, a bug in arm_add_memory() was spotted where the memory sizes
aren't properly rounded. As most people pass properly rounded sizes,
this hasn't been noticed"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 8292/1: mm: fix size rounding-down of arm_add_memory() function
ARM: 8255/1: perf: Prevent wraparound during overflow
ARM: 8266/1: Remove early stack deallocation from restore_user_regs
Linus Torvalds [Fri, 23 Jan 2015 21:55:13 +0000 (09:55 +1200)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux
Pull two arm64 fixes from Will Deacon:
"Arm64 fixes seem to come in pairs recently. We've got a fix for
removing device-tree blobs when doing a make clean and another one
addressing a missing include, which fixes build failures in -next for
allmodconfig (spotted by Mark's buildbot).
Summary from signed tag:
- fix cleaning of .dtbs following directory restructuring
- fix allmodconfig build breakage in -next due to missing include"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: dump: Fix implicit inclusion of definition for PCI_IOBASE
arm64: Add dtb files to archclean rule
Darren Hart [Wed, 21 Jan 2015 18:36:11 +0000 (10:36 -0800)]
Revert "platform: x86: dell-laptop: Add support for keyboard backlight"
This reverts commit
02b2aaaa57ab41504e8d03a3b2ceeb9440a2c188.
This interface was determined to be flawed and required too invasive a
fix for the RC cycle. This will be revisited in 3.20.
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Darren Hart [Wed, 21 Jan 2015 18:34:43 +0000 (10:34 -0800)]
Revert "Documentation: Add entry for dell-laptop sysfs interface"
This reverts commit
3161293ba6dfceee9c1efe75185677445def05d4.
This interface was determined to be flawed and required too invasive a
fix for the RC cycle. This will be revisited in 3.20.
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Joe Thornber [Fri, 23 Jan 2015 10:16:16 +0000 (10:16 +0000)]
dm cache: fix problematic dual use of a single migration count variable
Introduce a new variable to count the number of allocated migration
structures. The existing variable cache->nr_migrations became
overloaded. It was used to:
i) track of the number of migrations in flight for the purposes of
quiescing during suspend.
ii) to estimate the amount of background IO occuring.
Recent discard changes meant that REQ_DISCARD bios are processed with
a migration. Discards are not background IO so nr_migrations was not
incremented. However this could cause quiescing to complete early.
(i) is now handled with a new variable cache->nr_allocated_migrations.
cache->nr_migrations has been renamed cache->nr_io_migrations.
cleanup_migration() is now called free_io_migration(), since it
decrements that variable.
Also, remove the unused cache->next_migration variable that got replaced
with with prealloc_structs a while ago.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
Joe Thornber [Fri, 23 Jan 2015 10:00:07 +0000 (10:00 +0000)]
dm cache: share cache-metadata object across inactive and active DM tables
If a DM table is reloaded with an inactive table when the device is not
suspended (normal procedure for LVM2), then there will be two dm-bufio
objects that can diverge. This can lead to a situation where the
inactive table uses bufio to read metadata at the same time the active
table writes metadata -- resulting in the inactive table having stale
metadata buffers once it is promoted to the active table slot.
Fix this by using reference counting and a global list of cache metadata
objects to ensure there is only one metadata object per metadata device.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
Pantelis Antoniou [Fri, 19 Dec 2014 12:34:34 +0000 (14:34 +0200)]
of/unittest: Overlays with sub-devices tests
Introduce selftests for overlays using sub-devices present
in children nodes.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Nadav Amit [Thu, 1 Jan 2015 21:11:11 +0000 (23:11 +0200)]
KVM: x86: SYSENTER emulation is broken
SYSENTER emulation is broken in several ways:
1. It misses the case of 16-bit code segments completely (CVE-2015-0239).
2. MSR_IA32_SYSENTER_CS is checked in 64-bit mode incorrectly (bits 0 and 1 can
still be set without causing #GP).
3. MSR_IA32_SYSENTER_EIP and MSR_IA32_SYSENTER_ESP are not masked in
legacy-mode.
4. There is some unneeded code.
Fix it.
Cc: stable@vger.linux.org
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Nadav Amit [Thu, 8 Jan 2015 10:59:03 +0000 (11:59 +0100)]
KVM: x86: Fix of previously incomplete fix for CVE-2014-8480
STR and SLDT with rip-relative operand can cause a host kernel oops.
Mark them as DstMem as well.
Cc: stable@vger.linux.org
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Mark Brown [Thu, 22 Jan 2015 20:52:10 +0000 (20:52 +0000)]
arm64: dump: Fix implicit inclusion of definition for PCI_IOBASE
Since
c9465b4ec37a68425 (arm64: add support to dump the kernel page tables)
allmodconfig has failed to build on arm64 as a result of:
../arch/arm64/mm/dump.c:55:20: error: 'PCI_IOBASE' undeclared here (not in a function)
Fix this by explicitly including io.h to ensure that a definition is
present.
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Alexandre Demers [Tue, 9 Dec 2014 06:27:50 +0000 (01:27 -0500)]
x86/tsc: Change Fast TSC calibration failed from error to info
Many users see this message when booting without knowning that it is
of no importance and that TSC calibration may have succeeded by
another way.
As explained by Paul Bolle in
http://lkml.kernel.org/r/
1348488259.1436.22.camel@x61.thuisdomein
"Fast TSC calibration failed" should not be considered as an error
since other calibration methods are being tried afterward. At most,
those send a warning if they fail (not an error). So let's change
the message from error to warning.
[ tglx: Make if pr_info. It's really not important at all ]
Fixes:
c767a54ba065 x86/debug: Add KERN_<LEVEL> to bare printks, convert printks to pr_<level>
Signed-off-by: Alexandre Demers <alexandre.f.demers@gmail.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1418106470-6906-1-git-send-email-alexandre.f.demers@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Bryan O'Donoghue [Thu, 22 Jan 2015 22:58:49 +0000 (22:58 +0000)]
x86/apic: Re-enable PCI_MSI support for non-SMP X86_32
Commit
0dbc6078c06bc0 ('x86, build, pci: Fix PCI_MSI build on !SMP')
introduced the dependency that X86_UP_APIC is only available when
PCI_MSI is false. This effectively prevents PCI_MSI support on 32bit
UP systems because it disables both APIC and IO-APIC. But APIC support
is architecturally required for PCI_MSI.
The intention of the patch was to enforce APIC support when PCI_MSI is
enabled, but failed to do so.
Remove the !PCI_MSI dependency from X86_UP_APIC and enforce
X86_UP_APIC when PCI_MSI support is enabled on 32bit UP systems.
[ tglx: Massaged changelog ]
Fixes
0dbc6078c06bc0 'x86, build, pci: Fix PCI_MSI build on !SMP'
Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1421967529-9037-1-git-send-email-pure.logic@nexus-software.ie
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Juergen Gross [Thu, 22 Jan 2015 11:43:17 +0000 (12:43 +0100)]
x86, mm: Change cachemode exports to non-gpl
Commit
281d4078bec3 ("x86: Make page cache mode a real type")
introduced the symbols __cachemode2pte_tbl and __pte2cachemode_tbl and
exported them via EXPORT_SYMBOL_GPL. The exports are part of a
replacement of code which has been EXPORT_SYMBOL before these changes
resulting in build breakage of out-of-tree non-gpl modules.
Change EXPORT_SYMBOL_GPL to EXPORT-SYMBOL for these two symbols.
Fixes:
281d4078bec3 "x86: Make page cache mode a real type"
Reported-and-tested-by: Steven Noonan <steven@uplinklabs.net>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Toshi Kani <toshi.kani@hp.com>
Link: http://lkml.kernel.org/r/1421926997-28615-1-git-send-email-jgross@suse.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Andy Lutomirski [Thu, 22 Jan 2015 19:27:59 +0000 (11:27 -0800)]
x86, tls: Interpret an all-zero struct user_desc as "no segment"
The Witcher 2 did something like this to allocate a TLS segment index:
struct user_desc u_info;
bzero(&u_info, sizeof(u_info));
u_info.entry_number = (uint32_t)-1;
syscall(SYS_set_thread_area, &u_info);
Strictly speaking, this code was never correct. It should have set
read_exec_only and seg_not_present to 1 to indicate that it wanted
to find a free slot without putting anything there, or it should
have put something sensible in the TLS slot if it wanted to allocate
a TLS entry for real. The actual effect of this code was to
allocate a bogus segment that could be used to exploit espfix.
The set_thread_area hardening patches changed the behavior, causing
set_thread_area to return -EINVAL and crashing the game.
This changes set_thread_area to interpret this as a request to find
a free slot and to leave it empty, which isn't *quite* what the game
expects but should be close enough to keep it working. In
particular, using the code above to allocate two segments will
allocate the same segment both times.
According to FrostbittenKing on Github, this fixes The Witcher 2.
If this somehow still causes problems, we could instead allocate
a limit==0 32-bit data segment, but that seems rather ugly to me.
Fixes:
41bdc78544b8 x86/tls: Validate TLS entries to protect espfix
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: stable@vger.kernel.org
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/0cb251abe1ff0958b8e468a9a9a905b80ae3a746.1421954363.git.luto@amacapital.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Andy Lutomirski [Thu, 22 Jan 2015 19:27:58 +0000 (11:27 -0800)]
x86, tls, ldt: Stop checking lm in LDT_empty
32-bit programs don't have an lm bit in their ABI, so they can't
reliably cause LDT_empty to return true without resorting to memset.
They shouldn't need to do this.
This should fix a longstanding, if minor, issue in all 64-bit kernels
as well as a potential regression in the TLS hardening code.
Fixes:
41bdc78544b8 x86/tls: Validate TLS entries to protect espfix
Cc: stable@vger.kernel.org
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/72a059de55e86ad5e2935c80aa91880ddf19d07c.1421954363.git.luto@amacapital.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Dave Hansen [Thu, 8 Jan 2015 22:30:22 +0000 (14:30 -0800)]
x86, mpx: Strictly enforce empty prctl() args
Description from Michael Kerrisk. He suggested an identical patch
to one I had already coded up and tested.
commit
fe3d197f8431 "x86, mpx: On-demand kernel allocation of bounds
tables" added two new prctl() operations, PR_MPX_ENABLE_MANAGEMENT and
PR_MPX_DISABLE_MANAGEMENT. However, no checks were included to ensure
that unused arguments are zero, as is done in many existing prctl()s
and as should be done for all new prctl()s. This patch adds the
required checks.
Suggested-by: Andy Lutomirski <luto@amacapital.net>
Suggested-by: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dave Hansen <dave@sr71.net>
Link: http://lkml.kernel.org/r/20150108223022.7F56FD13@viggo.jf.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Dave Hansen [Thu, 8 Jan 2015 22:30:21 +0000 (14:30 -0800)]
x86, mpx: Fix potential performance issue on unmaps
The 3.19 merge window saw some TLB modifications merged which caused a
performance regression. They were fixed in commit
045bbb9fa.
Once that fix was applied, I also noticed that there was a small
but intermittent regression still present. It was not present
consistently enough to bisect reliably, but I'm fairly confident
that it came from (my own) MPX patches. The source was reading
a relatively unused field in the mm_struct via arch_unmap.
I also noted that this code was in the main instruction flow of
do_munmap() and probably had more icache impact than we want.
This patch does two things:
1. Adds a static (via Kconfig) and dynamic (via cpuid) check
for MPX with cpu_feature_enabled(). This keeps us from
reading that cacheline in the mm and trades it for a check
of the global CPUID variables at least on CPUs without MPX.
2. Adds an unlikely() to ensure that the MPX call ends up out
of the main instruction flow in do_munmap(). I've added
a detailed comment about why this was done and why we want
it even on systems where MPX is present.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: luto@amacapital.net
Cc: Dave Hansen <dave@sr71.net>
Link: http://lkml.kernel.org/r/20150108223021.AEEAB987@viggo.jf.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Dave Hansen [Thu, 8 Jan 2015 22:30:20 +0000 (14:30 -0800)]
x86, mpx: Explicitly disable 32-bit MPX support on 64-bit kernels
We had originally planned on submitting MPX support in one patch
set. We eventually broke it up in to two pieces for easier
review. One of the features that didn't make the first round
was supporting 32-bit binaries on 64-bit kernels.
Once we split the set up, we never added code to restrict 32-bit
binaries from _using_ MPX on 64-bit kernels.
The 32-bit bounds tables are a different format than the 64-bit
ones. Without this patch, the kernel will try to read a 32-bit
binary's tables as if they were the 64-bit version. They will
likely be noticed as being invalid rather quickly and the app
will get killed, but that's kinda mean.
This patch adds an explicit check, and will make a 64-bit kernel
essentially behave as if it has no MPX support when called from
a 32-bit binary.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave@sr71.net>
Link: http://lkml.kernel.org/r/20150108223020.9E9AA511@viggo.jf.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Lucas Stach [Mon, 19 Jan 2015 10:17:31 +0000 (11:17 +0100)]
MAINTAINERS: Update Richard Zhu's email address
The old cryptic address bounces, fix it by using a properly working one.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Richard Zhu <Richard.Zhu@freescale.com>
Linus Torvalds [Thu, 22 Jan 2015 18:53:06 +0000 (06:53 +1200)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
"Five more bug fixes from Michael for the s390 BPF jit"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/bpf: Zero extend parameters before calling C function
s390/bpf: Fix sk_load_byte_msh()
s390/bpf: Fix offset parameter for skb_copy_bits()
s390/bpf: Fix skb_copy_bits() parameter passing
s390/bpf: Fix JMP_JGE_K (A >= K) and JMP_JGT_K (A > K)
Linus Torvalds [Thu, 22 Jan 2015 18:52:14 +0000 (06:52 +1200)]
Merge tag 'nios2-fixes-v3.19-rc6' of git://git.rocketboards.org/linux-socfpga-next
Pull one arch/nios2 fix from Ley Foon Tan:
"Fix kuser trampoline address"
* tag 'nios2-fixes-v3.19-rc6' of git://git.rocketboards.org/linux-socfpga-next:
nios2: fix kuser trampoline address
Linus Torvalds [Thu, 22 Jan 2015 18:40:36 +0000 (06:40 +1200)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/rusty/linux
Pull module and param fixes from Rusty Russell:
"Surprising number of fixes this merge window :(
The first two are minor fallout from the param rework which went in
this merge window.
The next three are a series which fixes a longstanding (but never
previously reported and unlikely , so no CC stable) race between
kallsyms and freeing the init section.
Finally, a minor cleanup as our module refcount will now be -1 during
unload"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
module: make module_refcount() a signed integer.
module: fix race in kallsyms resolution during module load success.
module: remove mod arg from module_free, rename module_memfree().
module_arch_freeing_init(): new hook for archs before module->module_init freed.
param: fix uninitialized read with CONFIG_DEBUG_LOCK_ALLOC
param: initialize store function to NULL if not available.
Tyrel Datwyler [Tue, 13 Jan 2015 00:31:34 +0000 (16:31 -0800)]
MAINTAINERS: ibmvscsi driver maintainer change
Change maintainer of ibmvscsi driver to Tyrel Datwyler.
Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Acked-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Cc: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tyrel Datwyler [Tue, 13 Jan 2015 00:31:35 +0000 (16:31 -0800)]
MAINTAINERS: ibmvfc driver maintainer change
Change maintainer of ibmvfc driver to Tyrel Datwyler.
Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Cc: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Dave Jiang [Wed, 21 Jan 2015 16:13:41 +0000 (09:13 -0700)]
MAINTAINERS: Remove self as isci maintainer
Removing myself as a maintainer.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Colin Ian King [Thu, 22 Jan 2015 11:20:40 +0000 (11:20 +0000)]
scsi_debug: test always evaluates to false, || should be used instead
cppcheck found the following issue:
(warning) Logical conjunction always evaluates to false:
alloc_len < 4 && alloc_len > 65535.
..the test should be instead:
if (alloc_len < 4 || alloc_len > 65536)
This error was introduced by recent commit
38d5c8336e60bf6e53a1da9
("scsi_debug: add Report supported opcodes+tmfs; Compare and write")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Pantelis Antoniou [Tue, 16 Dec 2014 17:45:26 +0000 (19:45 +0200)]
of/platform: Handle of_populate drivers in notifier
When using overlays with drivers calling of_populate the notifier
will try to create the device twice. Using the populated bit
before proceeding protects against this.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Pantelis Antoniou [Tue, 16 Dec 2014 17:45:25 +0000 (19:45 +0200)]
of/overlay: Do not generate duplicate nodes
During the course of the rewrites a bug sneaked in when dealing
with children nodes of overlays, which ends up duplicating
sub nodes.
Simply remove the duplicate traversal of child nodes to fix.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Johannes Weiner [Thu, 22 Jan 2015 15:19:43 +0000 (10:19 -0500)]
cgroup: prevent mount hang due to memory controller lifetime
Since
b2052564e66d ("mm: memcontrol: continue cache reclaim from
offlined groups"), re-mounting the memory controller after using it is
very likely to hang.
The cgroup core assumes that any remaining references after deleting a
cgroup are temporary in nature, and synchroneously waits for them, but
the above-mentioned commit has left-over page cache pin its css until
it is reclaimed naturally. That being said, swap entries and charged
kernel memory have been doing the same indefinite pinning forever, the
bug is just more likely to trigger with left-over page cache.
Reparenting kernel memory is highly impractical, which leaves changing
the cgroup assumptions to reflect this: once a controller has been
mounted and used, it has internal state that is independent from mount
and cgroup lifetime. It can be unmounted and remounted, but it can't
be reconfigured during subsequent mounts.
Don't offline the controller root as long as there are any children,
dead or alive. A remount will no longer wait for these old references
to drain, it will simply mount the persistent controller state again.
Reported-by: "Suzuki K. Poulose" <Suzuki.Poulose@arm.com>
Reported-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Thomas Gleixner [Thu, 22 Jan 2015 11:26:41 +0000 (12:26 +0100)]
Merge branch 'fortglx/3.19-stable/time' of https://git.linaro.org/people/john.stultz/linux into timers/urgent
Pull urgent fixes from John Stultz:
Two urgent fixes for user triggerable time related overflow issues
Ley Foon Tan [Thu, 22 Jan 2015 09:05:16 +0000 (17:05 +0800)]
nios2: fix kuser trampoline address
__kuser_sigtramp address should be 0x1044 instead of 0x1040.
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Olof Johansson [Thu, 22 Jan 2015 01:15:49 +0000 (17:15 -0800)]
Merge tag 'renesas-soc-fixes2-for-v3.19' of git://git./linux/kernel/git/horms/renesas into fixes
Merge "Second Round of Renesas ARM Based SoC Fixes for v3.19" from Simon
Horman:
* Instantiate GIC from C board code in legacy builds on r8a7778 and r8a7779
* tag 'renesas-soc-fixes2-for-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
ARM: shmobile: r8a7779: Instantiate GIC from C board code in legacy builds
ARM: shmobile: r8a7778: Instantiate GIC from C board code in legacy builds
Signed-off-by: Olof Johansson <olof@lixom.net>
Rusty Russell [Thu, 22 Jan 2015 00:43:14 +0000 (11:13 +1030)]
module: make module_refcount() a signed integer.
James Bottomley points out that it will be -1 during unload. It's
only used for diagnostics, so let's not hide that as it could be a
clue as to what's gone wrong.
Cc: Jason Wessel <jason.wessel@windriver.com>
Acked-and-documention-added-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: Masami Hiramatsu <maasami.hiramatsu.pt@hitachi.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Sakari Ailus [Thu, 1 Jan 2015 21:13:54 +0000 (18:13 -0300)]
[media] omap3isp: Correctly set QUERYCAP capabilities
device_caps in struct v4l2_capability were inadequately set in
VIDIOC_QUERYCAP. Fix this. Without this a WARN_ON in the v4l2 core
is triggered. This WARN_ON was added for kernel 3.19 exactly to
detect these situations.
Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Hans Verkuil [Mon, 19 Jan 2015 10:14:14 +0000 (07:14 -0300)]
[media] cx23885: fix free interrupt bug
First free the interrupt, then disable the PCI device. The other way
around will lead to this warning:
Jan 19 11:42:02 telek kernel: [ 1440.161234] WARNING: CPU: 0 PID: 2191 at kernel/irq/manage.c:1311 __free_irq+0x97/0x1f0()
Jan 19 11:42:02 telek kernel: [ 1440.161236] Trying to free already-free IRQ 0
Jan 19 11:42:02 telek kernel: [ 1440.161237] Modules linked in: tda8290 tda10048 cx25840 cx23885(-) altera_ci tda18271 altera_stapl videobuf2_dvb tveeprom cx2341x videobuf2_dma_sg dvb_core rc_core videobuf2_memops videobuf2_core v4l2_common videodev media nouveau x86_pkg_temp_thermal cfbfillrect cfbimgblt cfbcopyarea ttm drm_kms_helper processor button isci
Jan 19 11:42:02 telek kernel: [ 1440.161266] CPU: 0 PID: 2191 Comm: rmmod Tainted: G W 3.19.0-rc1-telek #345
Jan 19 11:42:02 telek kernel: [ 1440.161268] Hardware name: ASUSTeK COMPUTER INC. Z9PE-D8 WS/Z9PE-D8 WS, BIOS 5404 02/10/2014
Jan 19 11:42:02 telek kernel: [ 1440.161270]
ffffffff81bf1fce ffff8808958b7cc8 ffffffff8194a97f 0000000000000000
Jan 19 11:42:02 telek kernel: [ 1440.161274]
ffff8808958b7d18 ffff8808958b7d08 ffffffff810c56b0 0000000000000286
Jan 19 11:42:02 telek kernel: [ 1440.161279]
0000000000000000 0000000000000000 ffff88089f808890 ffff88089f808800
Jan 19 11:42:02 telek kernel: [ 1440.161284] Call Trace:
Jan 19 11:42:02 telek kernel: [ 1440.161290] [<
ffffffff8194a97f>] dump_stack+0x4f/0x7b
Jan 19 11:42:02 telek kernel: [ 1440.161295] [<
ffffffff810c56b0>] warn_slowpath_common+0x80/0xc0
Jan 19 11:42:02 telek kernel: [ 1440.161299] [<
ffffffff810c5731>] warn_slowpath_fmt+0x41/0x50
Jan 19 11:42:02 telek kernel: [ 1440.161303] [<
ffffffff81955d36>] ? _raw_spin_lock_irqsave+0x56/0x70
Jan 19 11:42:02 telek kernel: [ 1440.161307] [<
ffffffff81114849>] ? __free_irq+0x49/0x1f0
Jan 19 11:42:02 telek kernel: [ 1440.161311] [<
ffffffff81114897>] __free_irq+0x97/0x1f0
Jan 19 11:42:02 telek kernel: [ 1440.161316] [<
ffffffff81114a88>] free_irq+0x48/0xd0
Jan 19 11:42:02 telek kernel: [ 1440.161323] [<
ffffffffa00e6deb>] cx23885_finidev+0x4b/0x90 [cx23885]
Jan 19 11:42:02 telek kernel: [ 1440.161329] [<
ffffffff814529fa>] pci_device_remove+0x3a/0xc0
Jan 19 11:42:02 telek kernel: [ 1440.161334] [<
ffffffff8153b4ea>] __device_release_driver+0x7a/0xf0
Jan 19 11:42:02 telek kernel: [ 1440.161338] [<
ffffffff8153bc98>] driver_detach+0xc8/0xd0
Jan 19 11:42:02 telek kernel: [ 1440.161341] [<
ffffffff8153b1de>] bus_remove_driver+0x4e/0xb0
Jan 19 11:42:02 telek kernel: [ 1440.161345] [<
ffffffff8153c2eb>] driver_unregister+0x2b/0x60
Jan 19 11:42:02 telek kernel: [ 1440.161349] [<
ffffffff814525c5>] pci_unregister_driver+0x25/0x70
Jan 19 11:42:02 telek kernel: [ 1440.161355] [<
ffffffffa00f6ddc>] cx23885_fini+0x10/0x12 [cx23885]
Jan 19 11:42:02 telek kernel: [ 1440.161360] [<
ffffffff81139a98>] SyS_delete_module+0x1a8/0x1f0
Jan 19 11:42:02 telek kernel: [ 1440.161364] [<
ffffffff819561a9>] system_call_fastpath+0x12/0x17
Jan 19 11:42:02 telek kernel: [ 1440.161367] ---[ end trace
a9c07cb5f3357020 ]---
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Hans Verkuil [Mon, 19 Jan 2015 09:23:26 +0000 (06:23 -0300)]
[media] pvrusb2: fix missing device_caps in querycap
The VIDIOC_QUERYCAP function should set device_caps, but this was missing.
In addition, it set the version field as well, but that should be done by
the core, not by the driver.
If a driver doesn't set device_caps the v4l2 core will issue a WARN_ON, so
it's important that this is set correctly.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Hans Verkuil [Mon, 19 Jan 2015 09:16:18 +0000 (06:16 -0300)]
[media] vb2: fix vb2_thread_stop race conditions
The locking scheme inside the vb2 thread is unsafe when stopping the
thread. In particular kthread_stop was called *after* internal data
structures were cleaned up instead of doing that before. In addition,
internal vb2 functions were called after threadio->stop was set to
true and vb2_internal_streamoff was called. This is also not allowed.
All this led to a variety of race conditions and kernel warnings and/or
oopses.
Fixed by moving the kthread_stop call up before the cleanup takes
place, and by checking threadio->stop before calling internal vb2
queuing operations.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: <stable@vger.kernel.org> # for v3.16 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Nobuhiro Iwamatsu [Wed, 14 Jan 2015 00:55:02 +0000 (21:55 -0300)]
[media] rcar_vin: Update device_caps and capabilities in querycap
The V4L2 API requires both .capabilities and .device_caps fields of
struct v4l2_capability to be set. Otherwise the compliance checker
complains and since commit "v4l2-ioctl: WARN_ON if querycap didn't fill
device_caps" a compile-time warning is issued. Fix this non-compliance
in the rcar_vin driver.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Guennadi Liakhovetski [Sun, 18 Jan 2015 19:30:11 +0000 (16:30 -0300)]
[media] soc-camera: fix device capabilities in multiple camera host drivers
The V4L2 API requires both .capabilities and .device_caps fields of
struct v4l2_capability to be set. Otherwise the compliance checker
complains and since commit "v4l2-ioctl: WARN_ON if querycap didn't fill
device_caps" a compile-time warning is issued. Fix this non-compliance
in several soc-camera camera host drivers.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Jonathan McDowell [Fri, 2 Jan 2015 17:55:17 +0000 (14:55 -0300)]
[media] Fix Mygica T230 support
Commit
2adb177e57417cf8409e86bda2c516e5f99a2099 removed 2 devices
from the cxusb device table but failed to fix up the T230 properties
that follow, meaning that this device no longer gets detected properly.
Adjust the cxusb_table index appropriate so detection works.
Signed-off-by: Jonathan McDowell <noodles@earth.li>
Reviewed-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Matthias Schwarzott [Mon, 22 Dec 2014 22:51:39 +0000 (19:51 -0300)]
[media] cx23885: Split Hauppauge WinTV Starburst from HVR4400 card entry
Unconditionally attaching Si2161/Si2165 demod driver
breaks Hauppauge WinTV Starburst.
So create own card entry for this.
Add card name comments to the subsystem ids.
This fixes a regression introduced in 3.17 by
36efec48e2e6016e05364906720a0ec350a5d768 ([media] cx23885: Add si2165 support for HVR-5500)
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
CC: stable@vger.kernel.org # for 3.17 and upper
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Mauro Carvalho Chehab [Tue, 23 Dec 2014 17:02:57 +0000 (14:02 -0300)]
[media] tlg2300: Fix media dependencies
X-Patchwork-Delegate: m.chehab@samsung.com
Changeset
ea2e813e8cc3 moved the driver to staging, but it forgot to
preserve the existing dependency.
Fixes:
ea2e813e8cc3 ("[media] tlg2300: move to staging in preparation for removal")
Reported-by: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Linus Torvalds [Wed, 21 Jan 2015 18:26:07 +0000 (06:26 +1200)]
Merge tag 'trace-sh-3.19' of git://git./linux/kernel/git/rostedt/linux-trace
Pull superh tracing fix from Steven Rostedt:
"It's been reported that function tracing does not work on the sh
architecture because gcc 4.8 for superH does not support -m32, and the
recordmcount.pl script adds "-m32" when re-compiling the object files
with the mcount locations.
I was not able to reproduce this problem, as it seems that -m32 works
fine for my cross compiler gcc 4.6.3, but I have to assume that -m32
was deprecated somewhere between 4.6 and 4.8. As it still seems to
compile fine without -m32, I have no reason not to add this patch, as
having -m32 seems to cause trouble for others"
* tag 'trace-sh-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
scripts/recordmcount.pl: There is no -m32 gcc option on Super-H anymore
Masahiro Yamada [Tue, 20 Jan 2015 03:38:25 +0000 (04:38 +0100)]
ARM: 8292/1: mm: fix size rounding-down of arm_add_memory() function
The current rounding of "size" is wrong:
- If "start" is sufficiently near the next page boundary, "size"
is decremented by more than enough and the last page is lost.
- If "size" is sufficiently small, it is wrapped around and gets
a bogus value.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Wolfram Sang [Sun, 21 Dec 2014 21:14:43 +0000 (22:14 +0100)]
watchdog: drop owner assignment from platform_drivers
This platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>