diff options
| author | Stephane Eranian <eranian@google.com> | 2015-11-12 11:00:03 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-11-23 09:21:03 +0100 |
| commit | ddaaf4e291dd63db0667991e4a335fcf3a7df13e (patch) | |
| tree | 844099db01306e6badb1cd9bc867e19263547812 /sound | |
| parent | 1ec218373b8ebda821aec00bb156a9c94fad9cd4 (diff) | |
| download | op-kernel-dev-ddaaf4e291dd63db0667991e4a335fcf3a7df13e.zip op-kernel-dev-ddaaf4e291dd63db0667991e4a335fcf3a7df13e.tar.gz | |
perf/core: Fix RCU problem with cgroup context switching code
The RCU checker detected RCU violation in the cgroup switching routines
perf_cgroup_sched_in() and perf_cgroup_sched_out(). We were dereferencing
cgroup from task without holding the RCU lock.
Fix this by holding the RCU read lock. We move the locking from
perf_cgroup_switch() to avoid double locking.
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: edumazet@google.com
Link: http://lkml.kernel.org/r/1447322404-10920-2-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions
