Commit-ID: 3a497f48637e2aac17eabb84a17f8ac5216028fc Gitweb: http://git.kernel.org/tip/3a497f48637e2aac17eabb84a17f8ac5216028fc Author: Peter Zijlstra <pet...@infradead.org> AuthorDate: Mon, 5 May 2014 12:42:29 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Wed, 7 May 2014 13:44:19 +0200
perf: Simplify perf_event_exit_task_context() Instead of jumping through hoops to make sure to find (and exit) each event, do it the simple straight fwd way. Signed-off-by: Peter Zijlstra <pet...@infradead.org> Cc: Arnaldo Carvalho de Melo <a...@kernel.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Paul Mackerras <pau...@samba.org> Cc: Vince Weaver <vincent.wea...@maine.edu> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/n/tip-tij931199thfkys8vbnok...@git.kernel.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- kernel/events/core.c | 17 +---------------- 1 file changed, 1 insertion(+), 16 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index 83505a3..7ab734f 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7485,24 +7485,9 @@ static void perf_event_exit_task_context(struct task_struct *child, int ctxn) */ mutex_lock(&child_ctx->mutex); -again: - list_for_each_entry_safe(child_event, tmp, &child_ctx->pinned_groups, - group_entry) - __perf_event_exit_task(child_event, child_ctx, child); - - list_for_each_entry_safe(child_event, tmp, &child_ctx->flexible_groups, - group_entry) + list_for_each_entry_rcu(child_event, &child_ctx->event_list, event_entry) __perf_event_exit_task(child_event, child_ctx, child); - /* - * If the last event was a group event, it will have appended all - * its siblings to the list, but we obtained 'tmp' before that which - * will still point to the list head terminating the iteration. - */ - if (!list_empty(&child_ctx->pinned_groups) || - !list_empty(&child_ctx->flexible_groups)) - goto again; - mutex_unlock(&child_ctx->mutex); put_ctx(child_ctx); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
