From 27f9994c50e95f3a5a81fe4c7491a9f9cffe6ec0 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Fri, 25 Sep 2009 13:54:01 +0800 Subject: [PATCH] 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 Acked-by: Peter Zijlstra Cc: Paul Mackerras LKML-Reference: <4ABC5AF9.6060808@cn.fujitsu.com> Signed-off-by: Ingo Molnar --- kernel/perf_event.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/kernel/perf_event.c b/kernel/perf_event.c index e50543db642..e491fb08793 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;