On Tue, May 14, 2024, at 13:08, Niklas Schnelle wrote:
> In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at
> compile time. We thus need to #ifdef functions and their callsites which
> unconditionally use these I/O accessors. In the include/video/vga.h
> these are conveniently all those functions with the vga_io_* prefix.
>
> Co-developed-by: Arnd Bergmann <a...@kernel.org>
> Signed-off-by: Arnd Bergmann <a...@kernel.org>
> Signed-off-by: Niklas Schnelle <schne...@linux.ibm.com>
> ---
> Note: This patch does not depend any not-yet-mainline HAS_IOPORT changes
> and may be merged via subsystem specific trees at your earliest
> convenience.
>
> v1 -> v2:
> - Moved vga_mm_r(), vga_mm_w(), vga_mm_w_fast() above #ifdef CONFIG_HAS_IOPORT
> to use them in with or without I/O port variants.
> - Duplicated vga_r(), vga_w(), vga_w_fast() functions as non-I/O port variants
> to get rid of in-code #ifdef (Arnd)
> - Got rid of if (regbase) logic inversion needed for in-code #ifdef
Thanks for preparing the new version!
> diff --git a/include/video/vga.h b/include/video/vga.h
> index 947c0abd04ef..468764d6727a 100644
> --- a/include/video/vga.h
> +++ b/include/video/vga.h
> @@ -197,9 +197,26 @@ struct vgastate {
> extern int save_vga(struct vgastate *state);
> extern int restore_vga(struct vgastate *state);
>
> +static inline unsigned char vga_mm_r (void __iomem *regbase, unsigned
> short port)
> +{
> + return readb (regbase + port);
> +}
My first thought was that this should use the normal whitespace,
but I guess the file is pretty consistent about the style here,
so I agree with your choice here.
Arnd
