sched: Fix cfs_bandwidth misuse of hrtimer_expires_remaining
authorBen Segall <bsegall@google.com>
Wed, 16 Oct 2013 18:16:17 +0000 (11:16 -0700)
committerIngo Molnar <mingo@kernel.org>
Tue, 29 Oct 2013 11:02:20 +0000 (12:02 +0100)
commitdb06e78cc13d70f10877e0557becc88ab3ad2be8
tree867b99d17a5df49fc4c413940a99e6209e81e7a7
parent1ee14e6c8cddeeb8a490d7b54cd9016e4bb900b4
sched: Fix cfs_bandwidth misuse of hrtimer_expires_remaining

hrtimer_expires_remaining does not take internal hrtimer locks and thus
must be guarded against concurrent __hrtimer_start_range_ns (but
returning HRTIMER_RESTART is safe). Use cfs_b->lock to make it safe.

Signed-off-by: Ben Segall <bsegall@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: pjt@google.com
Link: http://lkml.kernel.org/r/20131016181617.22647.73829.stgit@sword-of-the-dawn.mtv.corp.google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
kernel/sched/fair.c