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authorPeter Zijlstra <peterz@infradead.org>2017-03-16 13:47:50 +0100
committerIngo Molnar <mingo@kernel.org>2017-03-16 14:16:53 +0100
commit15121c789e001168decac6483d192bdb7ea29e74 (patch)
tree80bc185614be7980c6f7ed9a0d1c1e0f13572ec6 /kernel/events
parente7cc4865f0f31698ef2f7aac01a50e78968985b7 (diff)
downloadlinux-15121c789e001168decac6483d192bdb7ea29e74.tar.bz2
perf/core: Simplify perf_event_free_task()
We have ctx->event_list that contains all events; no need to repeatedly iterate the group lists to find them all. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: fweisbec@gmail.com Link: http://lkml.kernel.org/r/20170316125823.239678244@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/core.c12
1 files changed, 1 insertions, 11 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index fc7c9a85944d..5f21e5e09ba4 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10426,21 +10426,11 @@ void perf_event_free_task(struct task_struct *task)
WRITE_ONCE(ctx->task, TASK_TOMBSTONE);
put_task_struct(task); /* cannot be last */
raw_spin_unlock_irq(&ctx->lock);
-again:
- list_for_each_entry_safe(event, tmp, &ctx->pinned_groups,
- group_entry)
- perf_free_event(event, ctx);
- list_for_each_entry_safe(event, tmp, &ctx->flexible_groups,
- group_entry)
+ list_for_each_entry_safe(event, tmp, &ctx->event_list, event_entry)
perf_free_event(event, ctx);
- if (!list_empty(&ctx->pinned_groups) ||
- !list_empty(&ctx->flexible_groups))
- goto again;
-
mutex_unlock(&ctx->mutex);
-
put_ctx(ctx);
}
}