[BUGFIX PATCH -tip 2/5] perf probe: Fix strtailcmp() to compare s1[0] and s2[0]

[Masami Hiramatsu]

From: Juha Leppanen <juha_motorsportcom@luukku.com>

Fix strtailcmp() to compare s1[0] and s2[0].
strtailcmp() returns 0 if "a" and "b" or "a" and "ab", it's
a wrong behavior. This patch fixes it.

Signed-off-by: "Juha Leppanen" <juha_motorsportcom@luukku.com>
Reported-by: "Juha Leppanen" <juha_motorsportcom@luukku.com>
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
---

 tools/perf/util/probe-finder.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 293cdfc..4585f1d 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -106,7 +106,7 @@ static int strtailcmp(const char *s1, const char *s2)
 {
 	int i1 = strlen(s1);
 	int i2 = strlen(s2);
-	while (--i1 > 0 && --i2 > 0) {
+	while (--i1 >= 0 && --i2 >= 0) {
 		if (s1[i1] != s2[i2])
 			return s1[i1] - s2[i2];
 	}


-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@redhat.com