linux-kernel - [PATCH 1/2] kernel.h: introduce BUILD_BUG_ON_NOT_SAME

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Date:	Wed, 16 Feb 2011 22:55:50 +0100
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	kernel@...gutronix.de
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 1/2] kernel.h: introduce BUILD_BUG_ON_NOT_SAME_TYPE

This patch introduces BUILD_BUG_ON_NOT_SAME_TYPE which forces a compilation
error if the two supplied variables don't have the same type.

Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 include/linux/kernel.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2fe6e84..b637d57 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -612,6 +612,8 @@ extern int __build_bug_on_failed;
 	} while(0)
 #endif
 
+#define BUILD_BUG_ON_NOT_SAME_TYPE(a, b) BUILD_BUG_ON(!__same_type((a), (b)));
+
 /* Trap pasters of __FUNCTION__ at compile-time */
 #define __FUNCTION__ (__func__)
 
-- 
1.7.2.3

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