feat(libc): introduce __maybe_unused

Checkpatch script doesn't support __unused macro. To avoid errors, add
__maybe_unused macro, which is supported.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I795134fb152991f2bc804a6b3be2fd1da7032758

diff --git a/include/lib/libc/cdefs.h b/include/lib/libc/cdefs.h
index 0d0072254ae0b439520705ebd52e901c41245f69..423f0db7d810d9785bfa808a309ebb38767da4b0 100644 (file)
--- a/include/lib/libc/cdefs.h
+++ b/include/lib/libc/cdefs.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -12,6 +12,7 @@
 #define __packed       __attribute__((__packed__))
 #define __used         __attribute__((__used__))
 #define __unused       __attribute__((__unused__))
+#define __maybe_unused __attribute__((__unused__))
 #define __aligned(x)   __attribute__((__aligned__(x)))
 #define __section(x)   __attribute__((__section__(x)))
 #if RECLAIM_INIT_CODE