lkml.org 
[lkml]   [2015]   [Sep]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] tools-perf: Change -1 by false
Date
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@gmail.com>
---
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 49a5c6a..ce465b2 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -639,7 +639,7 @@ 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) {
--
2.1.0


\
 
 \ /
  Last update: 2015-09-17 12:41    [W:0.050 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site