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tracing: Use str_has_prefix() in synth_event_create()

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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>
This commit is contained in:
Tom Zanussi 2019-02-04 15:07:23 -06:00 committed by Steven Rostedt (VMware)
parent 745cfeaac0
commit ed581aaf99
1 changed files with 2 additions and 2 deletions
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4
kernel/trace/trace_events_hist.c
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@ -1316,8 +1316,8 @@ static int synth_event_create(int argc, const char **argv)
/* This interface accepts group name prefix */ /* This interface accepts group name prefix */
if (strchr(name, '/')) { if (strchr(name, '/')) {
len = sizeof(SYNTH_SYSTEM "/") - 1; len = str_has_prefix(name, SYNTH_SYSTEM "/");
if (strncmp(name, SYNTH_SYSTEM "/", len)) if (len == 0)
return -EINVAL; return -EINVAL;
name += len; name += len;
} }