diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2015-01-05 10:18:10 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-01-14 12:34:19 (GMT) |
| commit | cebde6d681aa45f96111cfcffc1544cf2a0454ff (patch) | |
| tree | 87cfce57adc5dde39b37ee7bc2e665d572f8117a /kernel/sched/fair.c | |
| parent | 1b537c7d1e58c761212a193085f9049b58f672e6 (diff) | |
| download | linux-cebde6d681aa45f96111cfcffc1544cf2a0454ff.tar.xz | |
sched/core: Validate rq_clock*() serialization
rq->clock{,_task} are serialized by rq->lock, verify this.
One immediate fail is the usage in scale_rt_capability, so 'annotate'
that for now, there's more 'funny' there. Maybe change rq->lock into a
raw_seqlock_t?
(Only 32-bit is affected)
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20150105103554.361872747@infradead.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: umgwanakikbuti@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/fair.c')
| -rw-r--r-- | kernel/sched/fair.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 2a0b302..50ff902 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5948,8 +5948,8 @@ static unsigned long scale_rt_capacity(int cpu) */ age_stamp = ACCESS_ONCE(rq->age_stamp); avg = ACCESS_ONCE(rq->rt_avg); + delta = __rq_clock_broken(rq) - age_stamp; - delta = rq_clock(rq) - age_stamp; if (unlikely(delta < 0)) delta = 0; |