Commit-ID: bf6445631c6f00882b25516a174d5073ce0c6f81
Gitweb: http://git.kernel.org/tip/bf6445631c6f00882b25516a174d5073ce0c6f81
Author: Peter Senna Tschudin <peter.senna@xxxxxxxxx>
AuthorDate: Thu, 17 Sep 2015 12:08:53 +0200
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 17 Sep 2015 15:31:52 -0300
perf tools: Bool functions shouldn't return -1
Returning a negative value for a boolean function seem to have the
undesired effect of returning true. Replace -1 by false in a
bool-returning function.
The diff of the .s file before and after the change (for x86_64):
3907c3907
< movl $1, %ebx
---
> xorl %ebx, %ebx
while if -1 is replaced by true, the diff is empty.
This issue was found by the following Coccinelle semantic patch:
<smpl>
@@
identifier f;
constant C;
typedef bool;
@@
bool f (...){
<+...
* return -C;
...+>
}
</smpl>
Signed-off-by: Peter Senna Tschudin <peter.senna@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxx>
Cc: Matt Fleming <matt.fleming@xxxxxxxxx>
Cc: Milos Vyletel <milos@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1442484533-19742-1-git-send-email-peter.senna@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/util.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 7acafb3..c2cd9bf2 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -709,7 +709,7 @@ bool find_process(const char *name)
dir = opendir(procfs__mountpoint());
if (!dir)
- return -1;
+ return false;
/* Walk through the directory. */
while (ret && (d = readdir(dir)) != NULL) {
--
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