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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 <lizf@cn.fujitsu.com>
LKML-Reference: <4B4E8721.5090301@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Li Zefan 2010-01-14 10:53:21 +08:00 committed by Steven Rostedt
parent 751e9983ee
commit 285caad415
1 changed files with 1 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
kernel/trace/trace_events_filter.c
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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;
}