Commit 54ed1444 authored Nov 03, 2015 by Steven Rostedt (Red Hat) Committed by Steven Rostedt Nov 03, 2015

ring_buffer: Remove unneeded smp_wmb() before wakeup of reader benchmark



wake_up_process() has a memory barrier before doing anything, thus adding a
memory barrier before calling it is redundant.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

parent 919cd979

kernel/trace/ring_buffer_benchmark.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -288,8 +288,6 @@ static void ring_buffer_producer(void)
		/* the completions must be visible before the finish var */
		smp_wmb();
		reader_finish = 1;
		/* finish var visible before waking up the consumer */
		smp_wmb();
		wake_up_process(consumer);
		wait_for_completion(&read_done);
		}

Admin message