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selftests: proc: mark vsyscall strings maybe-unused

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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>
This commit is contained in:
Bala-Vignesh-Reddy 2025-08-20 23:26:10 +05:30 committed by Andrew Morton
parent 3e3f55f8b7
commit 17bdc64c0d
1 changed files with 8 additions and 4 deletions
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12
tools/testing/selftests/proc/proc-pid-vm.c
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@ -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 *payload, size_t len)
* 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__