Got below error when run "make everything".
restripe.c: In function ‘test_stripes’:
restripe.c:870:4: error: ignoring return value of ‘read’, declared with attribute warn_unused_result [-Werror=unused-result]
read(source[i], stripes[i], chunk_size);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fix it by set the return value of ‘read’ to diskP, which should be
harmless since diskP will be set again before it is used.
Signed-off-by: Guoqing Jiang <guoqing.jiang@xxxxxxxxxxxxxxx>
---
restripe.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/restripe.c b/restripe.c
index 31b07e8..21c90f5 100644
--- a/restripe.c
+++ b/restripe.c
@@ -867,7 +867,11 @@ int test_stripes(int *source, unsigned long long *offsets,
for (i = 0 ; i < raid_disks ; i++) {
lseek64(source[i], offsets[i]+start, 0);
- read(source[i], stripes[i], chunk_size);
+ /*
+ * To resolve "ignoring return value of ‘read’", it
+ * should be harmless since diskP will be again later.
+ */
+ diskP = read(source[i], stripes[i], chunk_size);
}
for (i = 0 ; i < data_disks ; i++) {
int disk = geo_map(i, start/chunk_size, raid_disks,
--
2.17.1
