Re: [PATCH 1/4] [v4] Kbuild: add -Wno-shift-negative-value where -Wextra is used

[David Sterba]

On Tue, Mar 08, 2022 at 10:56:12PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
> 
> As a preparation for moving to -std=gnu11, turn off the
> -Wshift-negative-value option. This warning is enabled by gcc when
> building with -Wextra for c99 or higher, but not for c89. Since
> the kernel already relies on well-defined overflow behavior,
> the warning is not helpful and can simply be disabled in
> all locations that use -Wextra.
> 
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> [v4]
>   split into a separate patch
> ---
>  drivers/gpu/drm/i915/Makefile          | 1 +
>  drivers/staging/greybus/tools/Makefile | 3 ++-

For

>  fs/btrfs/Makefile                      | 1 +

Acked-by: David Sterba <dsterba@xxxxxxxx>