Re: [PATCH 02/11] x86: sysfb: remove sysfb when probing real hw

From: Ingo Molnar
Date: Thu Jan 23 2014 - 12:14:45 EST

* David Herrmann <dh.herrmann@xxxxxxxxx> wrote:

> >> +#ifdef CONFIG_X86_SYSFB
> >> +# include <asm/sysfb.h>
> >> +#endif
> >
> > I guess a single space is sufficient?
> >
> > Better yet, I'd include sysfb.h unconditionally:
> Unconditionally won't work as only x86 has this header. [...]

Well, in non-x86 code an #ifdef x86 looks ugly as well - but I guess
better than not building.

> [...] If there's a way to place a dummy into asm-generic which is
> picked if arch/xy/include/asm/ doesn't have the header, let me know.

Not that I know of.

> But if I include it unconditionally without any fallback, this will
> fail on non-x86. And adding the header to all archs seems overkill.

So why not drop the x86-ism and rename it to CONFIG_PLATFORM_SYSFB?
Some platforms configure it, some don't. Then the prototypes could
move into include/linux/sysfb.h or so and would be platform agnostic.


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