[for-next][PATCH 16/21] tracing: Change `if (strlen(glob))` to `if (glob[0])`

Steven Rostedt
2022-04-27T19:37:55Z

From: Ammar Faizi <ammarfaizi2@gnuweeb.org>

No need to traverse to the end of string. If the first byte is not a NUL
char, it's guaranteed `if (strlen(glob))` is true.

Link: https://lkml.kernel.org/r/20220417185630.199062-3-ammarfaizi2@gnuweeb.org

Cc: Ingo Molnar <mingo@redhat.com>
Cc: GNU/Weeb Mailing List <gwml@vger.gnuweeb.org>
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
kernel/trace/trace_events_hist.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 80c25be23c45..fe10179893c1 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -6217,7 +6217,7 @@ static int event_hist_trigger_parse(struct event_command *cmd_ops,
if (WARN_ON(!glob))
return -EINVAL;

- if (strlen(glob)) {
+ if (glob[0]) {
hist_err_clear();
last_cmd_set(file, param_and_filter);
}
--
2.35.1