[tip:perf/core] events: Add note to update_event_times comment about holding ctx->lock

[tip-bot for Eric B Munson <emunson@mgebm.net>]

Commit-ID:  b7526f0ca6dc68f57ca467ce503151b1d476a3e4
Gitweb:     http://git.kernel.org/tip/b7526f0ca6dc68f57ca467ce503151b1d476a3e4
Author:     Eric B Munson <emunson@mgebm.net>
AuthorDate: Thu, 23 Jun 2011 16:34:37 -0400
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Fri, 1 Jul 2011 11:06:33 +0200

events: Add note to update_event_times comment about holding ctx->lock

Signed-off-by: Eric B Munson <emunson@mgebm.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1308861279-15216-1-git-send-email-emunson@mgebm.net
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 kernel/events/core.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index e4aee51..2293e0b 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -748,6 +748,7 @@ static u64 perf_event_time(struct perf_event *event)
 
 /*
  * Update the total_time_enabled and total_time_running fields for a event.
+ * The caller of this function needs to hold the ctx->lock.
  */
 static void update_event_times(struct perf_event *event)
 {