Re: [PATCH -next] fbdev: atyfb: always declare aty_{ld,st}_lcd()

[Nick Desaulniers]

On Wed, Feb 24, 2021 at 1:55 PM Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:
>
> The previously added stubs for aty_{ld,}st_lcd() make it
> so that these functions are used regardless of the config
> options that were guarding them, so remove the #ifdef/#endif
> lines and make their declarations always visible.
> This fixes build warnings that were reported by clang:

Yes, though I think GCC would warn similarly with W=1 builds as well,
which was set for the 0day bot report.

>
>    drivers/video/fbdev/aty/atyfb_base.c:180:6: warning: no previous prototype for function 'aty_st_lcd' [-Wmissing-prototypes]
>    void aty_st_lcd(int index, u32 val, const struct atyfb_par *par)
>         ^
>    drivers/video/fbdev/aty/atyfb_base.c:180:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
>    void aty_st_lcd(int index, u32 val, const struct atyfb_par *par)
>
>    drivers/video/fbdev/aty/atyfb_base.c:183:5: warning: no previous prototype for function 'aty_ld_lcd' [-Wmissing-prototypes]
>    u32 aty_ld_lcd(int index, const struct atyfb_par *par)
>        ^
>    drivers/video/fbdev/aty/atyfb_base.c:183:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
>    u32 aty_ld_lcd(int index, const struct atyfb_par *par)
>
> They should not be marked as static since they are used in
> mach64_ct.c.

Probably don't need to be marked extern either (since that's the
implicit default), but I don't feel strongly about it.

Thanks for sending a cleanup for this.
Acked-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>

>
> Fixes: bfa5782b9caa ("fbdev: atyfb: add stubs for aty_{ld,st}_lcd()")
> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
> Cc: linux-fbdev@xxxxxxxxxxxxxxx
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
> Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> ---
>  drivers/video/fbdev/aty/atyfb.h |    3 ---
>  1 file changed, 3 deletions(-)
>
> --- linux-next-20210219.orig/drivers/video/fbdev/aty/atyfb.h
> +++ linux-next-20210219/drivers/video/fbdev/aty/atyfb.h
> @@ -287,11 +287,8 @@ static inline void aty_st_8(int regindex
>  #endif
>  }
>
> -#if defined(CONFIG_PMAC_BACKLIGHT) || defined (CONFIG_FB_ATY_GENERIC_LCD) || \
> -defined (CONFIG_FB_ATY_BACKLIGHT)
>  extern void aty_st_lcd(int index, u32 val, const struct atyfb_par *par);
>  extern u32 aty_ld_lcd(int index, const struct atyfb_par *par);
> -#endif
>
>      /*
>       *  DAC operations



-- 
Thanks,
~Nick Desaulniers