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tracing/filters: Fix MATCH_FRONT_ONLY filter matching

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MATCH_FRONT_ONLY actually is a full matching:

  # ./perf record -R -f -a -e lock:lock_acquire \
	--filter 'name ~rcu_*' sleep 1
  # ./perf trace
  (no output)

We should pass the length of the pattern string to strncmp().

Signed-off-by: Li Zefan <[email protected]>
LKML-Reference: <[email protected]>
Acked-by: Frederic Weisbecker <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
This commit is contained in:
Li Zefan authored and Steven Rostedt committed 2010-01-14 22:38:05 -05:00
1 parent 751e9983ee
commit 285caad415
1 file changed
+1 -1
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kernel/trace/trace_events_filter.c
+1 -1
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@@ -261,7 +261,7 @@ static int regex_match_full(char *str, struct regex *r, int len)
static int regex_match_front(char *str, struct regex *r, int len)
{
if (strncmp(str, r->pattern, len) == 0)
if (strncmp(str, r->pattern, r->len) == 0)
return 1;
return 0;
}