linux-kernel - [tip:x86/asm] include/linux/compiler-gcc4.h: Fix build bug - gcc-4.0.2 doesn't understand __builtin_object

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Message-ID: <tip-7cff7ce94a7df2ccf5ac76b48ee0995fee2060df@git.kernel.org>
Date:	Thu, 3 Dec 2009 13:21:45 GMT
From:	tip-bot for Andrew Morton <akpm@...ux-foundation.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	arjan@...ux.intel.com, akpm@...ux-foundation.org,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:x86/asm] include/linux/compiler-gcc4.h: Fix build bug - gcc-4.0.2 doesn't understand __builtin_object_size

Commit-ID:  7cff7ce94a7df2ccf5ac76b48ee0995fee2060df
Gitweb:     http://git.kernel.org/tip/7cff7ce94a7df2ccf5ac76b48ee0995fee2060df
Author:     Andrew Morton <akpm@...ux-foundation.org>
AuthorDate: Fri, 9 Oct 2009 00:01:39 -0700
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 3 Dec 2009 07:29:17 +0100

include/linux/compiler-gcc4.h: Fix build bug - gcc-4.0.2 doesn't understand __builtin_object_size

Maybe 4.1.0 doesn't too, but this fixed it for me.

Caused by:

 4a31276: x86: Turn the copy_from_user check into an (optional) compile time warning
 9f0cf4a: x86: Use __builtin_object_size() to validate the buffer size for copy_from_user()

Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Cc: Arjan van de Ven <arjan@...ux.intel.com>
LKML-Reference: <200910090724.n997OQl6013538@...p1.linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 include/linux/compiler-gcc4.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
index 77542c5..e6ef279 100644
--- a/include/linux/compiler-gcc4.h
+++ b/include/linux/compiler-gcc4.h
@@ -38,7 +38,9 @@
 
 #endif
 
+#if __GNUC_MINOR__ > 0
 #define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
+#endif
 #if __GNUC_MINOR__ >= 4
 #define __compiletime_warning(message) __attribute__((warning(message)))
 #define __compiletime_error(message) __attribute__((error(message)))
--
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