Re: [PATCH v3 35/38] video: handle HAS_IOPORT dependencies

Geert Uytterhoeven
2023-03-15T08:17:09Z

Hi Niklas,

On Tue, Mar 14, 2023 at 1:13 PM Niklas Schnelle <schnelle@linux.ibm.com> wrote:
> In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
> not being declared. We thus need to add HAS_IOPORT as dependency for
> those drivers using them and guard inline code in headers.
>
> Co-developed-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>

Thanks for your patch!

> --- a/drivers/video/fbdev/Kconfig
> +++ b/drivers/video/fbdev/Kconfig

> @@ -1284,7 +1285,7 @@ config FB_ATY128_BACKLIGHT
>
> config FB_ATY
> tristate "ATI Mach64 display support" if PCI || ATARI
> - depends on FB && !SPARC32
> + depends on FB && HAS_IOPORT && !SPARC32

On Atari, this works without ATARI_ROM_ISA, hence it must not depend
on HAS_IOPORT.
The only call to inb() is inside a section protected by #ifdef
CONFIG_PCI. So:

depends on FB && !SPARC32
depends on ATARI || HAS_IOPORT

> select FB_CFB_FILLRECT
> select FB_CFB_COPYAREA
> select FB_CFB_IMAGEBLIT

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@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