From 4e4cf62b37da5ff45c904a3acf242ab29ed5881d Mon Sep 17 00:00:00 2001 From: Numfor Mbiziwo-Tiapo Date: Tue, 2 Jul 2019 10:37:15 -0700 Subject: [PATCH] perf test mmap-thread-lookup: Initialize variable to suppress memory sanitizer warning Running the 'perf test' command after building perf with a memory sanitizer causes a warning that says: WARNING: MemorySanitizer: use-of-uninitialized-value... in mmap-thread-lookup.c Initializing the go variable to 0 silences this harmless warning. Committer warning: This was harmless, just a simple test writing whatever was at that sizeof(int) memory area just to signal another thread blocked reading that file created with pipe(). Initialize it tho so that we don't get this warning. Signed-off-by: Numfor Mbiziwo-Tiapo Cc: Alexander Shishkin Cc: Ian Rogers Cc: Jiri Olsa Cc: Mark Drayton Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Song Liu Cc: Stephane Eranian Link: http://lkml.kernel.org/r/20190702173716.181223-1-nums@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/tests/mmap-thread-lookup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/tests/mmap-thread-lookup.c b/tools/perf/tests/mmap-thread-lookup.c index ba87e6e8d18c..0a4301a5155c 100644 --- a/tools/perf/tests/mmap-thread-lookup.c +++ b/tools/perf/tests/mmap-thread-lookup.c @@ -53,7 +53,7 @@ static void *thread_fn(void *arg) { struct thread_data *td = arg; ssize_t ret; - int go; + int go = 0; if (thread_init(td)) return NULL; -- 2.30.2