tracing: Use str_has_prefix() in synth_event_create()
Since we now have a str_has_prefix() that returns the length, we can
use that instead of explicitly calculating it.
Link: http://lkml.kernel.org/r/03418373fd1e80030e7394b8e3e081c5de28a710.1549309756.git.tom.zanussi@linux.intel.com
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 66386ba..5b03b9a 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1316,8 +1316,8 @@ static int synth_event_create(int argc, const char **argv)
/* This interface accepts group name prefix */
if (strchr(name, '/')) {
- len = sizeof(SYNTH_SYSTEM "/") - 1;
- if (strncmp(name, SYNTH_SYSTEM "/", len))
+ len = str_has_prefix(name, SYNTH_SYSTEM "/");
+ if (len == 0)
return -EINVAL;
name += len;
}
