[PATCH 3/4] tracing/filters: Fix MATCH_FRONT_ONLY filter matching

[Li Zefan <lizf@cn.fujitsu.com>]

MATCH_FRONT_ONLY matching works exactly as MATCH_FULL.

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

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
---
 kernel/trace/trace_events_filter.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index c8eb1c0..bd492ce 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -262,7 +262,7 @@ 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;
 }
-- 
1.6.3