[PATCH] perf bench: Fix 2 memory sanitizer warnings

[Ian Rogers]

Memory sanitizer warns if a write is performed where the memory
being read for the write is uninitialized. Avoid this warning by
initializing the memory.

Signed-off-by: Ian Rogers <irog...@google.com>
---
 tools/perf/bench/sched-messaging.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/bench/sched-messaging.c 
b/tools/perf/bench/sched-messaging.c
index 71d830d7b923..cecce93ccc63 100644
--- a/tools/perf/bench/sched-messaging.c
+++ b/tools/perf/bench/sched-messaging.c
@@ -66,11 +66,10 @@ static void fdpair(int fds[2])
 /* Block until we're ready to go */
 static void ready(int ready_out, int wakefd)
 {
-       char dummy;
        struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
 
        /* Tell them we're ready. */
-       if (write(ready_out, &dummy, 1) != 1)
+       if (write(ready_out, "R", 1) != 1)
                err(EXIT_FAILURE, "CLIENT: ready write");
 
        /* Wait for "GO" signal */
@@ -85,6 +84,7 @@ static void *sender(struct sender_context *ctx)
        unsigned int i, j;
 
        ready(ctx->ready_out, ctx->wakefd);
+       memset(data, 'S', sizeof(data));
 
        /* Now pump to every receiver. */
        for (i = 0; i < nr_loops; i++) {
-- 
2.28.0.618.gf4bc123cb7-goog