Gcc complains about:
lib/perf-counter.c:43:13: error: ignoring return value of 'read',
declared with attribute warn_unused_result [-Werror=unused-result]
read(fd__, counter, sizeof(*counter));
Signed-off-by: Andy Zhou <[email protected]>
---
lib/perf-counter.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/lib/perf-counter.c b/lib/perf-counter.c
index 7bd7834..10cc97f 100644
--- a/lib/perf-counter.c
+++ b/lib/perf-counter.c
@@ -39,8 +39,10 @@ static int fd__ = 0;
uint64_t
perf_counter_read(uint64_t *counter)
{
- if (fd__ > 0) {
- read(fd__, counter, sizeof(*counter));
+ if (fd__ <= 0) {
+ if (read(fd__, counter, sizeof(*counter)) < 0) {
+ *counter = 0;
+ }
} else {
*counter = 0;
}
--
1.9.1
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