This is a note to let you know that I've just added the patch titled
lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
lib-ubsan.c-don-t-mark-__ubsan_handle_builtin_unreachable-as-noreturn.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1c23b4108d716cc848b38532063a8aca4f86add8 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Fri, 16 Nov 2018 15:08:35 -0800
Subject: lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn
From: Arnd Bergmann <arnd@xxxxxxxx>
commit 1c23b4108d716cc848b38532063a8aca4f86add8 upstream.
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>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
lib/ubsan.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/lib/ubsan.c
+++ b/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 stable-queue which might be from arnd@xxxxxxxx are
queue-4.19/lib-ubsan.c-don-t-mark-__ubsan_handle_builtin_unreachable-as-noreturn.patch
queue-4.19/acpi-nfit-x86-mce-validate-a-mce-s-address-before-using-it.patch
queue-4.19/mtd-docg3-don-t-set-conflicting-bch_const_params-option.patch
queue-4.19/acpi-nfit-x86-mce-handle-only-uncorrectable-machine-checks.patch
