4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Arnd Bergmann arnd@arndb.de
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 | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/lib/ubsan.c +++ b/lib/ubsan.c @@ -451,8 +451,7 @@ 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;