From: angquan yu <angquan21@xxxxxxxxx>
In tools/testing/selftests/proc/proc-empty->because the return value of a write call was being ignored. This call was partof a conditional debugging block (if (0) { ... }), which meant it would neveractually execute.
This patch removes the unused debug write call. This cleanup resolves the compi>warning about ignoring the result of write declared with the warn_unused_resultattribute.
Removing this code also improves the clarity and maintainability ofthe function, as it eliminates a non-functional block of code.
This is original warning: proc-empty-vm.c: In function ‘test_proc_pid_statm’:proc-empty-vm.c:385:17: warning: ignoring return value of ‘write’ declared with>385 | write(1, buf, rv);|
Signed-off-by: angquan yu <angquan21@xxxxxxxxx>
---
tools/testing/selftests/proc/proc-empty-vm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/proc/proc-empty-vm.c b/tools/testing/selftests/proc/proc-empty-vm.c
index 56198d4ca..74ef8627f 100644
--- a/tools/testing/selftests/proc/proc-empty-vm.c
+++ b/tools/testing/selftests/proc/proc-empty-vm.c
@@ -382,7 +382,10 @@ static int test_proc_pid_statm(pid_t pid)
assert(rv >= 0);
assert(rv <= sizeof(buf));
if (0) {
- write(1, buf, rv);
+ ssize_t written = write(1, buf, rv);
+ if (written == -1) {
+ perror("write failed /proc/${pid}");
+ }
}
const char *p = buf;
--
2.39.2
