linux-kernel - [PATCH v2 15/20] linux/compiler.h: Implement __must_be_array() in terms of __must

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Date:   Sat, 20 Nov 2021 14:00:59 +0100
From:   Alejandro Colomar <alx.manpages@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Alejandro Colomar <alx.manpages@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Kees Cook <keescook@...omium.org>,
        Joe Perches <joe@...ches.com>
Subject: [PATCH v2 15/20] linux/compiler.h: Implement __must_be_array() in terms of __must_be()

Signed-off-by: Alejandro Colomar <alx.manpages@...il.com>
---
 include/linux/compiler.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 3d5af56337bd..64d99335874d 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -255,7 +255,7 @@ static inline void *offset_to_ptr(const int *off)
 #endif /* __ASSEMBLY__ */
 
 /* &a[0] degrades to a pointer: a different type from an array */
-#define __must_be_array(a)	BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
+#define __must_be_array(a)  __must_be(!__same_type((a), &(a)[0]))
 
 /*
  * This is needed in functions which generate the stack canary, see
-- 
2.33.1