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>

1 files changed, 0 insertions, 2 deletions

diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c
index 9e00fd178226..6df9a83e20d7 100644
--- a/kernel/trace/ring_buffer_benchmark.c
+++ b/kernel/trace/ring_buffer_benchmark.c
@@ -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);
         }