linux-kernel - [PATCH v2 17/20] linux/array_size.h: Add __is

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Message-Id: <20211120130104.185699-19-alx.manpages@gmail.com>
Date:   Sat, 20 Nov 2021 14:01:01 +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 17/20] linux/array_size.h: Add __is_array(a) to help readability

Signed-off-by: Alejandro Colomar <alx.manpages@...il.com>
---
 include/linux/array_size.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/array_size.h b/include/linux/array_size.h
index c2b4fddba564..4d364f8a1f50 100644
--- a/include/linux/array_size.h
+++ b/include/linux/array_size.h
@@ -7,7 +7,9 @@
 
 
 /* &a[0] degrades to a pointer: a different type from an array */
-#define __must_be_array(a)  __must_be(!__same_type((a), &(a)[0]))
+#define __is_array(a)  (!__same_type((a), &(a)[0]))
+
+#define __must_be_array(a)  __must_be(__is_array(a))
 
 /**
  * ARRAY_SIZE - get the number of elements in array @a
-- 
2.33.1