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authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>2009-09-25 13:54:01 +0800
committerIngo Molnar <mingo@elte.hu>2009-10-01 09:30:44 +0200
commit27f9994c50e95f3a5a81fe4c7491a9f9cffe6ec0 (patch)
tree0bab616325b5ebd3529842e1082f7a32fd87c149
parent8c9ed8e14c342ec5e7f27e7e498f62409a10eb29 (diff)
downloadop-kernel-dev-27f9994c50e95f3a5a81fe4c7491a9f9cffe6ec0.zip
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perf_event: Clean up perf_event_init_task()
While at it: we can traverse ctx->group_list to get all group leader, it should be safe since we hold ctx->mutex. Changlog v1->v2: - remove WARN_ON_ONCE() according to Peter Zijlstra's suggestion Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <4ABC5AF9.6060808@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--kernel/perf_event.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index e50543d..e491fb0 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -4767,9 +4767,7 @@ int perf_event_init_task(struct task_struct *child)
* We dont have to disable NMIs - we are only looking at
* the list, not manipulating it:
*/
- list_for_each_entry_rcu(event, &parent_ctx->event_list, event_entry) {
- if (event != event->group_leader)
- continue;
+ list_for_each_entry(event, &parent_ctx->group_list, group_entry) {
if (!event->attr.inherit) {
inherited_all = 0;
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