lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn
authorArnd Bergmann <arnd@arndb.de>
Fri, 16 Nov 2018 23:08:35 +0000 (15:08 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 21 Nov 2018 08:24:15 +0000 (09:24 +0100)
commitefcbe502ddcc9f28d88a7c35b90f121a4e176823
tree6059427e2007165ee9c9baef8388c7ca1224da5f
parentfdc427442b374e84077d4214733764efb1a38a0e
lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn

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@virtuozzo.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Olof Johansson <olof@lixom.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
lib/ubsan.c