linux-kernel - [PATCH] bug: Fix sparse warning related to BUILD_BUG_ON

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Date:	Mon, 19 Nov 2012 16:45:02 +0530
From:	Tushar Behera <tushar.behera@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	khlebnikov@...nvz.org, akpm@...ux-foundation.org,
	patches@...aro.org
Subject: [PATCH] bug: Fix sparse warning related to BUILD_BUG_ON_INVALID

commit baf05aa9271b ("bug: introduce BUILD_BUG_ON_INVALID() macro")
introduces this macro when only _CHECKER_ is defined. Define
a silent macro in the else condition to fix following sparse
warning.

mm/filemap.c:395:9: error: undefined identifier 'BUILD_BUG_ON_INVALID'
mm/filemap.c:396:9: error: undefined identifier 'BUILD_BUG_ON_INVALID'
mm/filemap.c:397:9: error: undefined identifier 'BUILD_BUG_ON_INVALID'
include/linux/mm.h:419:9: error: undefined identifier 'BUILD_BUG_ON_INVALID'
include/linux/mm.h:419:9: error: not a function <noident>

Signed-off-by: Tushar Behera <tushar.behera@...aro.org>
---
 include/linux/bug.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/include/linux/bug.h b/include/linux/bug.h
index aaac4bb..b1cf40d 100644
--- a/include/linux/bug.h
+++ b/include/linux/bug.h
@@ -15,6 +15,7 @@ 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_INVALID(e) (0)
 #define BUILD_BUG_ON(condition)
 #define BUILD_BUG() (0)
 #else /* __CHECKER__ */
-- 
1.7.4.1

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