* [tip:x86/asm] include/linux/compiler-gcc4.h: Fix build bug - gcc-4.0.2 doesn't understand __builtin_object_size
[not found] <200910090724.n997OQl6013538@imap1.linux-foundation.org>
@ 2009-12-03 13:21 ` tip-bot for Andrew Morton
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From: tip-bot for Andrew Morton @ 2009-12-03 13:21 UTC (permalink / raw)
To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, arjan, akpm, tglx, mingo
Commit-ID: 7cff7ce94a7df2ccf5ac76b48ee0995fee2060df
Gitweb: http://git.kernel.org/tip/7cff7ce94a7df2ccf5ac76b48ee0995fee2060df
Author: Andrew Morton <akpm@linux-foundation.org>
AuthorDate: Fri, 9 Oct 2009 00:01:39 -0700
Committer: Ingo Molnar <mingo@elte.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@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <200910090724.n997OQl6013538@imap1.linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.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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