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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-05-21 15:13:59 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-06-09 11:12:33 +0200 |
| commit | 8ed92280be013180e24c84456ab6babcb07037cc (patch) | |
| tree | 5b0826219599532cc1a17ed823bd2358a2bef666 /kernel | |
| parent | ecc55f84b2e9741f29daa787ded93986df6cbe17 (diff) | |
| download | linux-stable-8ed92280be013180e24c84456ab6babcb07037cc.tar.gz linux-stable-8ed92280be013180e24c84456ab6babcb07037cc.tar.bz2 linux-stable-8ed92280be013180e24c84456ab6babcb07037cc.zip | |
perf, trace: Remove superfluous rcu_read_lock()
__DO_TRACE() already calls the callbacks under rcu_read_lock_sched(),
which is sufficient for our needs, avoid doing it again.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/perf_event.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 4bd3b597bcca..b39bec346e80 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -4613,12 +4613,10 @@ void perf_tp_event(u64 addr, u64 count, void *record, int entry_size, perf_sample_data_init(&data, addr); data.raw = &raw; - rcu_read_lock(); hlist_for_each_entry_rcu(event, node, head, hlist_entry) { if (perf_tp_event_match(event, &data, regs)) perf_swevent_add(event, count, 1, &data, regs); } - rcu_read_unlock(); perf_swevent_put_recursion_context(rctx); } |