Commit d2c73501 authored by Ian Rogers's avatar Ian Rogers Committed by Arnaldo Carvalho de Melo
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perf bench: Fix 2 memory sanitizer warnings 



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: default avatarIan Rogers <irogers@google.com>
Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200912053725.1405857-1-irogers@google.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 8a39e8c4

tools/perf/bench/sched-messaging.c

+2 −2
Original line number Diff line number Diff line
@@ -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++) {