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SubjectRe: [PATCH v2] ubsan: don't mark __ubsan_handle_builtin_unreachable as noreturn
On Wed, Nov 7, 2018 at 6:45 AM Andrey Ryabinin <> wrote:
> From: Arnd Bergmann <>
> 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':
> Workaround this by removing the noreturn attribute.
> [aryabinin: Add information about GCC bug in changelog]
> Signed-off-by: Arnd Bergmann <>
> Signed-off-by: Andrey Ryabinin <>

Acked-by: Olof Johansson <>

While it's a GCC bug, it's there in official releases now and it makes
warnings noisy so we'd rather silence it.


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