[PATCH 141/161] perf tools: Fix old GCC build error in 'get_srcline'

[Arnaldo Carvalho de Melo]

From: David Ahern <dsahern@xxxxxxxxx>

trace-event-parse.c:parse_proc_kallsyms()

    Old GCC (4.4.2) does not see through the code flow of get_srcline() and
gets confused about the status of 'file' and 'line':

    CC       /tmp/build/perf/util/srcline.o
  cc1: warnings being treated as errors
  util/srcline.c: In function Âget_srclineÂ:
  util/srcline.c:226: error: Âfile may be used uninitialized in this function
  util/srcline.c:227: error: Âline may be used uninitialized in this function
  make[1]: *** [/tmp/build/perf/util/srcline.o] Error 1
  make: *** [install] Error 2
  make: Leaving directory `/home/acme/git/linux/tools/perf'
  [acme@fedora12 linux]$

Help out GCC by initializing 'file' and 'line'.

Signed-off-by: David Ahern <dsahern@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-h8k7h49z3cndqgjdftkmm9f8@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/srcline.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index 37353194e0f6..d11aefbc4b8d 100644
--- a/tools/perf/util/srcline.c
+++ b/tools/perf/util/srcline.c
@@ -223,8 +223,8 @@ out:
 
 char *get_srcline(struct dso *dso, unsigned long addr)
 {
-	char *file;
-	unsigned line;
+	char *file = NULL;
+	unsigned line = 0;
 	char *srcline;
 	char *dso_name = dso->long_name;
 	size_t size;
-- 
1.8.1.4

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