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lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn

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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/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Andrey Ryabinin <[email protected]>
Acked-by: Olof Johansson <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Arnd Bergmann 2018-11-16 15:08:35 -08:00 • committed by Linus Torvalds
commit 1c23b4108d
1 changed files with 1 additions and 2 deletions
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3
lib/ubsan.c
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@ -427,8 +427,7 @@ void __ubsan_handle_shift_out_of_bounds(struct shift_out_of_bounds_data *data,
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;