+ selftests-centralise-maybe-unused-definition-in-kselftesth.patch added to mm-nonmm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: selftests: centralise maybe-unused definition in kselftest.h
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     selftests-centralise-maybe-unused-definition-in-kselftesth.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-centralise-maybe-unused-definition-in-kselftesth.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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------------------------------------------------------
From: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com>
Subject: selftests: centralise maybe-unused definition in kselftest.h
Date: Thu, 21 Aug 2025 15:41:59 +0530

Several selftests subdirectories duplicated the define __maybe_unused,
leading to redundant code.  Move to kselftest.h header and remove other
definitions.

This addresses the duplication noted in the proc-pid-vm warning fix

Link: https://lkml.kernel.org/r/20250821101159.2238-1-reddybalavignesh9979@gmail.com
Signed-off-by: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Link:https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Acked-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/kselftest.h                    |    4 ++++
 tools/testing/selftests/landlock/audit.h               |    6 ++----
 tools/testing/selftests/landlock/common.h              |    4 ----
 tools/testing/selftests/mm/pkey-helpers.h              |    3 ---
 tools/testing/selftests/net/psock_lib.h                |    4 ----
 tools/testing/selftests/perf_events/watermark_signal.c |    2 --
 tools/testing/selftests/proc/proc-pid-vm.c             |    4 ----
 tools/testing/selftests/ublk/utils.h                   |    2 --
 8 files changed, 6 insertions(+), 23 deletions(-)

--- a/tools/testing/selftests/kselftest.h~selftests-centralise-maybe-unused-definition-in-kselftesth
+++ a/tools/testing/selftests/kselftest.h
@@ -96,6 +96,10 @@
 #define __unused         __attribute__((__unused__))
 #endif
 
+#ifndef __maybe_unused
+#define __maybe_unused __attribute__((__unused__))
+#endif
+
 /* counters */
 struct ksft_count {
 	unsigned int ksft_pass;
--- a/tools/testing/selftests/landlock/audit.h~selftests-centralise-maybe-unused-definition-in-kselftesth
+++ a/tools/testing/selftests/landlock/audit.h
@@ -20,14 +20,12 @@
 #include <sys/time.h>
 #include <unistd.h>
 
+#include "../kselftest.h"
+
 #ifndef ARRAY_SIZE
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 #endif
 
-#ifndef __maybe_unused
-#define __maybe_unused __attribute__((__unused__))
-#endif
-
 #define REGEX_LANDLOCK_PREFIX "^audit([0-9.:]\\+): domain=\\([0-9a-f]\\+\\)"
 
 struct audit_filter {
--- a/tools/testing/selftests/landlock/common.h~selftests-centralise-maybe-unused-definition-in-kselftesth
+++ a/tools/testing/selftests/landlock/common.h
@@ -22,10 +22,6 @@
 
 #define TMP_DIR "tmp"
 
-#ifndef __maybe_unused
-#define __maybe_unused __attribute__((__unused__))
-#endif
-
 /* TEST_F_FORK() should not be used for new tests. */
 #define TEST_F_FORK(fixture_name, test_name) TEST_F(fixture_name, test_name)
 
--- a/tools/testing/selftests/mm/pkey-helpers.h~selftests-centralise-maybe-unused-definition-in-kselftesth
+++ a/tools/testing/selftests/mm/pkey-helpers.h
@@ -84,9 +84,6 @@ extern void abort_hooks(void);
 #ifndef noinline
 # define noinline __attribute__((noinline))
 #endif
-#ifndef __maybe_unused
-# define __maybe_unused __attribute__((__unused__))
-#endif
 
 int sys_pkey_alloc(unsigned long flags, unsigned long init_val);
 int sys_pkey_free(unsigned long pkey);
--- a/tools/testing/selftests/net/psock_lib.h~selftests-centralise-maybe-unused-definition-in-kselftesth
+++ a/tools/testing/selftests/net/psock_lib.h
@@ -22,10 +22,6 @@
 
 #define PORT_BASE			8000
 
-#ifndef __maybe_unused
-# define __maybe_unused		__attribute__ ((__unused__))
-#endif
-
 static __maybe_unused void pair_udp_setfilter(int fd)
 {
 	/* the filter below checks for all of the following conditions that
--- a/tools/testing/selftests/perf_events/watermark_signal.c~selftests-centralise-maybe-unused-definition-in-kselftesth
+++ a/tools/testing/selftests/perf_events/watermark_signal.c
@@ -17,8 +17,6 @@
 
 #include "../kselftest_harness.h"
 
-#define __maybe_unused __attribute__((__unused__))
-
 static int sigio_count;
 
 static void handle_sigio(int signum __maybe_unused,
--- a/tools/testing/selftests/proc/proc-pid-vm.c~selftests-centralise-maybe-unused-definition-in-kselftesth
+++ a/tools/testing/selftests/proc/proc-pid-vm.c
@@ -47,10 +47,6 @@
 #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)
--- a/tools/testing/selftests/ublk/utils.h~selftests-centralise-maybe-unused-definition-in-kselftesth
+++ a/tools/testing/selftests/ublk/utils.h
@@ -2,8 +2,6 @@
 #ifndef KUBLK_UTILS_H
 #define KUBLK_UTILS_H
 
-#define __maybe_unused __attribute__((unused))
-
 #ifndef min
 #define min(a, b) ((a) < (b) ? (a) : (b))
 #endif
_

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

selftests-proc-mark-vsyscall-strings-maybe-unused.patch
selftests-centralise-maybe-unused-definition-in-kselftesth.patch