linux-kernel - [PATCH v2 20/20] linux/power_of_2.h: Implement [__]BUILD_BUG_ON_NOT_POWER_OF_2() in terms of __IS_POWER_OF_2[_OR

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Message-Id: <20211120130104.185699-22-alx.manpages@gmail.com>
Date:   Sat, 20 Nov 2021 14:01:04 +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 20/20] linux/power_of_2.h: Implement [__]BUILD_BUG_ON_NOT_POWER_OF_2() in terms of __IS_POWER_OF_2[_OR_0]()

Signed-off-by: Alejandro Colomar <alx.manpages@...il.com>
---
 include/linux/power_of_2.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/include/linux/power_of_2.h b/include/linux/power_of_2.h
index 132592f0b718..80d11714b0ad 100644
--- a/include/linux/power_of_2.h
+++ b/include/linux/power_of_2.h
@@ -10,10 +10,8 @@
 #define __IS_POWER_OF_2(n)       (__IS_POWER_OF_2_OR_0(n) && ((n) != 0))
 
 /* Force a compilation error if a constant expression is not a power of 2 */
-#define __BUILD_BUG_ON_NOT_POWER_OF_2(n)	\
-	BUILD_BUG_ON(((n) & ((n) - 1)) != 0)
-#define BUILD_BUG_ON_NOT_POWER_OF_2(n)			\
-	BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))
+#define __BUILD_BUG_ON_NOT_POWER_OF_2(n)  BUILD_BUG_ON(!__IS_POWER_OF_2_OR_0(n))
+#define BUILD_BUG_ON_NOT_POWER_OF_2(n)    BUILD_BUG_ON(!__IS_POWER_OF_2(n))
 
 
 #endif	/* _LINUX_POWER_OF_2_H */
-- 
2.33.1