Merge commit '559fa6e7' into perf/urgent

Merge reason: this commit was queued up quite some time ago but was
              forgotten about.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

kernel/profile.c

@@ -126,11 +126,9 @@ int __ref profile_init(void)
 	if (prof_buffer)
 		return 0;
 
-	prof_buffer = vmalloc(buffer_bytes);
-	if (prof_buffer) {
-		memset(prof_buffer, 0, buffer_bytes);
+	prof_buffer = vzalloc(buffer_bytes);
+	if (prof_buffer)
 		return 0;
-	}
 
 	free_cpumask_var(prof_cpu_mask);
 	return -ENOMEM;