The patch titled
Subject: lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn
has been added to the -mm tree. Its filename is
ubsan-dont-mark-__ubsan_handle_builtin_unreachable-as-noreturn.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ubsan-dont-mark-__ubsan_handle_builtin_unreachable-as-noreturn.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ubsan-dont-mark-__ubsan_handle_builtin_unreachable-as-noreturn.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn
gcc-8 complains about the prototype for this function:
lib/ubsan.c:432:1: error: ignoring attribute 'noreturn' in declaration of a built-in function '__ubsan_handle_builtin_unreachable' because it conflicts with attribute 'const' [-Werror=attributes]
This is actually a GCC's bug. In GCC internals
__ubsan_handle_builtin_unreachable() declared with both 'noreturn' and
'const' attributes instead of only 'noreturn':
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84210
Workaround this by removing the noreturn attribute.
[aryabinin: add information about GCC bug in changelog]
Link: http://lkml.kernel.org/r/20181107144516.4587-1-aryabinin@xxxxxxxxxxxxx
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Acked-by: Olof Johansson <olof@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/ubsan.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/lib/ubsan.c~ubsan-dont-mark-__ubsan_handle_builtin_unreachable-as-noreturn
+++ a/lib/ubsan.c
@@ -427,8 +427,7 @@ void __ubsan_handle_shift_out_of_bounds(
EXPORT_SYMBOL(__ubsan_handle_shift_out_of_bounds);
-void __noreturn
-__ubsan_handle_builtin_unreachable(struct unreachable_data *data)
+void __ubsan_handle_builtin_unreachable(struct unreachable_data *data)
{
unsigned long flags;
_
Patches currently in -mm which might be from arnd@xxxxxxxx are
ubsan-dont-mark-__ubsan_handle_builtin_unreachable-as-noreturn.patch
vfs-replace-current_kernel_time64-with-ktime-equivalent.patch
