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tracing: Change if (strlen(glob)) to if (glob[0])

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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>
This commit is contained in:
Ammar Faizi 2022-04-18 01:56:30 +07:00 committed by Steven Rostedt (Google)
parent 97a5d2e5e3
commit 69686fcbdc
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/trace_events_hist.c
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@ -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);
}