+ selftests-proc-mark-vsyscall-strings-maybe-unused.patch added to mm-nonmm-unstable branch

+ selftests-proc-mark-vsyscall-strings-maybe-unused.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: selftests: proc: mark vsyscall strings maybe-unused
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     selftests-proc-mark-vsyscall-strings-maybe-unused.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-proc-mark-vsyscall-strings-maybe-unused.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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------------------------------------------------------
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__
_

Patches currently in -mm which might be from reddybalavignesh9979@gmail.com are

selftests-proc-mark-vsyscall-strings-maybe-unused.patch