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| author | Peter Zijlstra <peterz@infradead.org> | 2017-09-05 14:17:58 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-10-27 10:31:58 +0200 |
| commit | 7f0ec32526d2446fdd79b0c6c6d08e64ef9fb1f3 (patch) | |
| tree | 8d40c42d6cd0e24600068e90285b5988ac40738f /kernel/events | |
| parent | 8ca2bd41c7d1c135e9ac6f25970c2d491865088a (diff) | |
| download | linux-7f0ec32526d2446fdd79b0c6c6d08e64ef9fb1f3.tar.bz2 | |
perf/core: Remove wrong barrier
The barrier and comment make no sense:
- if what the barrier says is true, it should be wmb() but that
should then be part of the arch driver, not the generic code.
- if it is an SMP barrier, there must be a matching barrier, and
there isn't one.
So kill it.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 6322e245176c..205a4321f678 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2097,11 +2097,6 @@ event_sched_in(struct perf_event *event, event->hw.interrupts = 0; } - /* - * The new state must be visible before we turn it on in the hardware: - */ - smp_wmb(); - perf_pmu_disable(event->pmu); perf_set_shadow_time(event, ctx, tstamp); |