From: angquan yu angquan21@gmail.com
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 of the 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@gmail.com --- tools/testing/selftests/proc/proc-empty-vm.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/proc/proc-empty-vm.c b/tools/testing/selftests/proc/proc-empty-vm.c index 5e7020630..d231e61e4 100644 --- a/tools/testing/selftests/proc/proc-empty-vm.c +++ b/tools/testing/selftests/proc/proc-empty-vm.c @@ -383,8 +383,10 @@ static int test_proc_pid_statm(pid_t pid) assert(rv <= sizeof(buf)); if (0) { ssize_t written = write(1, buf, rv); + if (written == -1) { perror("write failed to /proc/${pid}"); + return EXIT_FAILURE; } }