| From: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com> |
| Subject: selftests: proc: mark vsyscall strings maybe-unused |
| Date: Wed, 20 Aug 2025 23:26:10 +0530 |
| |
| The str_vsyscall_* constants in proc-pid-vm.c triggers |
| -Wunused-const-variable warnings with gcc-13.32 and clang 18.1. |
| |
| Define and apply __maybe_unused locally to suppress the warnings. No |
| functional change |
| |
| Fixes compiler warning: |
| warning: `str_vsyscall_*' defined but not used[-Wunused-const-variable] |
| |
| Link: https://lkml.kernel.org/r/20250820175610.83014-1-reddybalavignesh9979@gmail.com |
| Signed-off-by: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com> |
| Cc: Shuah Khan <shuah@kernel.org> |
| Cc: Suren Baghdasaryan <surenb@google.com> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| tools/testing/selftests/proc/proc-pid-vm.c | 12 ++++++++---- |
| 1 file changed, 8 insertions(+), 4 deletions(-) |
| |
| --- a/tools/testing/selftests/proc/proc-pid-vm.c~selftests-proc-mark-vsyscall-strings-maybe-unused |
| +++ a/tools/testing/selftests/proc/proc-pid-vm.c |
| @@ -47,6 +47,10 @@ |
| #include <sys/resource.h> |
| #include <linux/fs.h> |
| |
| +#ifndef __maybe_unused |
| +#define __maybe_unused __attribute__((__unused__)) |
| +#endif |
| + |
| #include "../kselftest.h" |
| |
| static inline long sys_execveat(int dirfd, const char *pathname, char **argv, char **envp, int flags) |
| @@ -218,12 +222,12 @@ static int make_exe(const uint8_t *paylo |
| * 2: vsyscall VMA is r-xp vsyscall=emulate |
| */ |
| static volatile int g_vsyscall; |
| -static const char *str_vsyscall; |
| +static const char *str_vsyscall __maybe_unused; |
| |
| -static const char str_vsyscall_0[] = ""; |
| -static const char str_vsyscall_1[] = |
| +static const char str_vsyscall_0[] __maybe_unused = ""; |
| +static const char str_vsyscall_1[] __maybe_unused = |
| "ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]\n"; |
| -static const char str_vsyscall_2[] = |
| +static const char str_vsyscall_2[] __maybe_unused = |
| "ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n"; |
| |
| #ifdef __x86_64__ |
| _ |
