linux-kernel - [PATCH v4 7/9] bug.h: Fix BUILD_BUG_ON macro in __CHECKER_

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Message-Id: <1351457835-7553-7-git-send-email-daniel.santos@pobox.com>
Date:	Sun, 28 Oct 2012 15:57:13 -0500
From:	danielfsantos@....net
To:	LKML <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...ux.intel.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christopher Li <sparse@...isli.org>,
	Daniel Santos <daniel.santos@...ox.com>,
	David Daney <david.daney@...ium.com>,
	David Howells <dhowells@...hat.com>,
	Joe Perches <joe@...ches.com>,
	Josh Triplett <josh@...htriplett.org>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	linux-sparse@...r.kernel.org,
	Michel Lespinasse <walken@...gle.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Pavel Pisa <pisa@....felk.cvut.cz>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Steven Rostedt <rostedt@...dmis.org>,
	Borislav Petkov <bp@...en8.de>,
	David Rientjes <rientjes@...gle.com>
Subject: [PATCH v4 7/9] bug.h: Fix BUILD_BUG_ON macro in __CHECKER__

When __CHECKER__ is defined, we disable all of the BUILD_BUG.* macros.
However, BUILD_BUG_ON was evaluating to nothing in this case, and we
want (0) since this is a function-like macro that will be followed by a
semicolon.

Signed-off-by: Daniel Santos <daniel.santos@...ox.com>
---
 include/linux/bug.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/bug.h b/include/linux/bug.h
index da03dc1..6c38988 100644
--- a/include/linux/bug.h
+++ b/include/linux/bug.h
@@ -16,7 +16,7 @@ struct pt_regs;
 #define BUILD_BUG_ON_NOT_POWER_OF_2(n)
 #define BUILD_BUG_ON_ZERO(e) (0)
 #define BUILD_BUG_ON_NULL(e) ((void*)0)
-#define BUILD_BUG_ON(condition)
+#define BUILD_BUG_ON(condition) (0)
 #define BUILD_BUG() (0)
 #else /* __CHECKER__ */
 
-- 
1.7.3.4

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