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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-11-20 22:19:53 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-21 14:11:39 +0100 |
| commit | 58e5ad1de3d6ad931c84f0cc8ef0655c922f30ad (patch) | |
| tree | f3b018f0f8ceaf21747b5e1d912ad30b40d00779 /kernel/perf_event.c | |
| parent | 3dbebf15c5d3e265f751eec72c1538a00da4be27 (diff) | |
| download | lwn-58e5ad1de3d6ad931c84f0cc8ef0655c922f30ad.tar.gz lwn-58e5ad1de3d6ad931c84f0cc8ef0655c922f30ad.zip | |
perf: Simplify __perf_event_read
cpuctx is always active, task context is always active for
current
the previous condition verifies that if its a task context its
for current, hence we can assume ctx->is_active.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20091120212509.000272254@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/perf_event.c')
| -rw-r--r-- | kernel/perf_event.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index af150bbcfc5b..028619dd6d0e 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -1526,10 +1526,9 @@ static void __perf_event_read(void *info) if (ctx->task && cpuctx->task_ctx != ctx) return; - if (ctx->is_active) - update_context_time(ctx); - event->pmu->read(event); + update_context_time(ctx); update_event_times(event); + event->pmu->read(event); } static u64 perf_event_read(struct perf_event *event) |