[PATCH] selftests/mm: centralize the __always_unused macro

[Muhammad Usama Anjum]

This macro gets used in different tests. Add it to kselftest.h
which is central location and tests use this header. Then use this new
macro.

Signed-off-by: Muhammad Usama Anjum <usama.an...@collabora.com>
---
 tools/testing/selftests/kselftest.h          | 4 ++++
 tools/testing/selftests/mm/protection_keys.c | 2 +-
 tools/testing/selftests/net/ovpn/ovpn-cli.c  | 3 ++-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kselftest.h 
b/tools/testing/selftests/kselftest.h
index 661d31c4b558c..274480e3573ab 100644
--- a/tools/testing/selftests/kselftest.h
+++ b/tools/testing/selftests/kselftest.h
@@ -92,6 +92,10 @@
 #endif
 #define __printf(a, b)   __attribute__((format(printf, a, b)))
 
+#ifndef __always_unused
+#define __always_unused __attribute__((__unused__))
+#endif
+
 #ifndef __maybe_unused
 #define __maybe_unused __attribute__((__unused__))
 #endif
diff --git a/tools/testing/selftests/mm/protection_keys.c 
b/tools/testing/selftests/mm/protection_keys.c
index 6281d4c61b50e..2085982dba696 100644
--- a/tools/testing/selftests/mm/protection_keys.c
+++ b/tools/testing/selftests/mm/protection_keys.c
@@ -1302,7 +1302,7 @@ static void test_mprotect_with_pkey_0(int *ptr, u16 pkey)
 
 static void test_ptrace_of_child(int *ptr, u16 pkey)
 {
-       __attribute__((__unused__)) int peek_result;
+       __always_unused int peek_result;
        pid_t child_pid;
        void *ignored = 0;
        long ret;
diff --git a/tools/testing/selftests/net/ovpn/ovpn-cli.c 
b/tools/testing/selftests/net/ovpn/ovpn-cli.c
index 9201f2905f2ce..688a5fa6fdacd 100644
--- a/tools/testing/selftests/net/ovpn/ovpn-cli.c
+++ b/tools/testing/selftests/net/ovpn/ovpn-cli.c
@@ -32,9 +32,10 @@
 
 #include <sys/socket.h>
 
+#include "../../kselftest.h"
+
 /* defines to make checkpatch happy */
 #define strscpy strncpy
-#define __always_unused __attribute__((__unused__))
 
 /* libnl < 3.5.0 does not set the NLA_F_NESTED on its own, therefore we
  * have to explicitly do it to prevent the kernel from failing upon
-- 
2.47.3