The patch titled
Subject: gcc4: disable __compiletime_object_size for GCC 4.6+
has been added to the -mm tree. Its filename is
gcc4-disable-__compiletime_object_size-for-gcc-46.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Guenter Roeck <linux@xxxxxxxxxxxx>
Subject: gcc4: disable __compiletime_object_size for GCC 4.6+
__builtin_object_size is known to be broken on gcc 4.6+.
See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48880 for details.
This causes unnecssary build warnings and errors such as
In function 'copy_from_user', inlined from 'sb16_copy_from_user'
at sound/oss/sb_audio.c:878:22:
arch/x86/include/asm/uaccess_32.h:211:26: error: call to 'copy_from_user_overflow'
declared with attribute error: copy_from_user() buffer size is not provably correct
make[3]: [sound/oss/sb_audio.o] Error 1 (ignored)
Disable it where broken.
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/compiler-gcc4.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN include/linux/compiler-gcc4.h~gcc4-disable-__compiletime_object_size-for-gcc-46 include/linux/compiler-gcc4.h
--- a/include/linux/compiler-gcc4.h~gcc4-disable-__compiletime_object_size-for-gcc-46
+++ a/include/linux/compiler-gcc4.h
@@ -13,7 +13,7 @@
#define __must_check __attribute__((warn_unused_result))
#define __compiler_offsetof(a,b) __builtin_offsetof(a,b)
-#if GCC_VERSION >= 40100
+#if GCC_VERSION >= 40100 && GCC_VERSION < 40600
# define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
#endif
_
Patches currently in -mm which might be from linux@xxxxxxxxxxxx are
linux-next.patch
gcc4-disable-__compiletime_object_size-for-gcc-46.patch
kernel-compatc-make-do_sysinfo-static.patch
kernel-timerc-convert-compat_sys_sysinfo-to-compat_syscall_define.patch
kernel-timerc-ove-some-non-timer-related-syscalls-to-kernel-sysc.patch
kernel-timerc-ove-some-non-timer-related-syscalls-to-kernel-sysc-checkpatch-fixes.patch
checkpatch-add-check-for-reuse-of-krealloc-arg.patch
i2o-check-copy_from_user-size-parameter.patch
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