diff options
| author | Ian Rogers <irogers@google.com> | 2020-09-11 22:37:25 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-09-14 18:30:26 -0300 |
| commit | d2c73501a767514b6c85c7feff9457a165d51057 (patch) | |
| tree | aed03a5f0aa0bbb512bce996fb6ccb657db7d18d | |
| parent | 8a39e8c4d9baf65d88f66d49ac684df381e30055 (diff) | |
| download | uml-d2c73501a767514b6c85c7feff9457a165d51057.tar.gz | |
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: Ian Rogers <irogers@google.com>
Acked-by: Jiri 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: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/bench/sched-messaging.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/bench/sched-messaging.c b/tools/perf/bench/sched-messaging.c index 71d830d7b92312..cecce93ccc6360 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++) { |