Re: [PATCH] can: rcar_canfd: Describe channel-specific FD registers using C struct

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Hi Geert,

Thanks for the patch.

On 19/06/2025 at 19:13, Geert Uytterhoeven wrote:
> The rcar_canfd_f_*() inline functions to obtain channel-specific CAN-FD
> register offsets really describe a memory layout.  Hence replace them by
> a C structure, to simplify the code, and reduce kernel size.
> 
> This also gets rid of warnings about unused rcar_canfd_f_*() inline
> functions, which are reported by recent versions of clang.
> 
> Suggested-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>
> Reported-by: Jakub Kicinski <kuba@xxxxxxxxxx>
> Closes: https://lore.kernel.org/20250618183827.5bebca8f@xxxxxxxxxx
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
> Fast-tracked because of the clang warnings.

Make sense.

@Jakub, OK for me if you want to directly pick this patch without going through
the linux-can tree.

> Changes compared to Vincent's original suggestion
> (https://lore.kernel.org/420d37b1-5648-4209-8d6f-1ac9d780eea2@xxxxxxxxxx):
>   - Move rcar_canfd_f to the old RCANFD_F_*() location,
>   - Update RSCFDnCFDCmXXX comment.
>   - Rename struct rcar_canfd_f to struct rcar_canfd_f,
                                           ^^^^^^^^^^^^
rcar_canfd_f_c ;)

>   - Rename cbase to fcbase,
>   - Drop static_assert(),
>   - Drop unused car_canfd_*_reg() functions.
>   - Drop simple wrappers around {read,write}l(),

Acked-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>


Yours sincerely,
Vincent Mailhol





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