[PATCH] fbdev/sh7760fb: Depend on FB=y

[Geert Uytterhoeven]

Hi Thomas,

On Mon, Sep 18, 2023 at 11:45 AM Thomas Zimmermann <tzimmermann at suse.de> wrote:
> Fix linker error if FB=m about missing fb_io_read and fb_io_write. The
> linker's error message suggests that this config setting has already
> been broken for other symbols.
>
>   All errors (new ones prefixed by >>):
>
>      sh4-linux-ld: drivers/video/fbdev/sh7760fb.o: in function `sh7760fb_probe':
>      sh7760fb.c:(.text+0x374): undefined reference to `framebuffer_alloc'
>      sh4-linux-ld: sh7760fb.c:(.text+0x394): undefined reference to `fb_videomode_to_var'
>      sh4-linux-ld: sh7760fb.c:(.text+0x39c): undefined reference to `fb_alloc_cmap'
>      sh4-linux-ld: sh7760fb.c:(.text+0x3a4): undefined reference to `register_framebuffer'
>      sh4-linux-ld: sh7760fb.c:(.text+0x3ac): undefined reference to `fb_dealloc_cmap'
>      sh4-linux-ld: sh7760fb.c:(.text+0x434): undefined reference to `framebuffer_release'
>      sh4-linux-ld: drivers/video/fbdev/sh7760fb.o: in function `sh7760fb_remove':
>      sh7760fb.c:(.text+0x800): undefined reference to `unregister_framebuffer'
>      sh4-linux-ld: sh7760fb.c:(.text+0x804): undefined reference to `fb_dealloc_cmap'
>      sh4-linux-ld: sh7760fb.c:(.text+0x814): undefined reference to `framebuffer_release'
>   >> sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0xc): undefined reference to `fb_io_read'
>   >> sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0x10): undefined reference to `fb_io_write'
>      sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0x2c): undefined reference to `cfb_fillrect'
>      sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0x30): undefined reference to `cfb_copyarea'
>      sh4-linux-ld: drivers/video/fbdev/sh7760fb.o:(.rodata+0x34): undefined reference to `cfb_imageblit'
>
> Suggested-by: Randy Dunlap <rdunlap at infradead.org>
> Reported-by: kernel test robot <lkp at intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202309130632.LS04CPWu-lkp@intel.com/
> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>

Thanks for your patch!

> --- a/drivers/video/fbdev/Kconfig
> +++ b/drivers/video/fbdev/Kconfig
> @@ -1756,7 +1756,7 @@ config FB_COBALT
>
>  config FB_SH7760
>         bool "SH7760/SH7763/SH7720/SH7721 LCDC support"
> -       depends on FB && (CPU_SUBTYPE_SH7760 || CPU_SUBTYPE_SH7763 \
> +       depends on FB=y && (CPU_SUBTYPE_SH7760 || CPU_SUBTYPE_SH7763 \
>                 || CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721)
>         select FB_IOMEM_HELPERS
>         help
> --

Any reason this can't become tristate instead?
drivers/video/fbdev/sh7760fb.c uses module_platform_driver(), and
already has all needed MODULE_*().

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds