[tip:perf/urgent] perf build-id: Fix filename size calculation

[tip-bot for Namhyung Kim <namhyung@gmail.com>]

Commit-ID:  afda0f94483f46a4caddb529b8f95e0aaf015de6
Gitweb:     http://git.kernel.org/tip/afda0f94483f46a4caddb529b8f95e0aaf015de6
Author:     Namhyung Kim <namhyung@gmail.com>
AuthorDate: Tue, 1 May 2012 23:19:36 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 1 May 2012 14:13:00 -0300

perf build-id: Fix filename size calculation

The filename is a pointer variable so the sizeof(filename) will return
length of a pointer. Fix it by using 'size'.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1335881976-3282-1-git-send-email-namhyung@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/header.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 4c7c2d7..c0b70c6 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -296,7 +296,7 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
 	if (mkdir_p(filename, 0755))
 		goto out_free;
 
-	snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id);
+	snprintf(filename + len, size - len, "/%s", sbuild_id);
 
 	if (access(filename, F_OK)) {
 		if (is_kallsyms) {