Re: [PATCH v3 1/3] asm-generic/io.h: Implement generic {read,write}s*()

From: Sam Ravnborg
Date: Tue Aug 05 2014 - 05:14:53 EST


> >
> > So xxx_p is for pause (or something like that).
> > This also matches that m68k do some tricks with delay() in the _p variants.
> > Thanks for the explanation.
>
> m68k's isa_delay() uses the same approach as x86's slow_down_io(),
> but only for Q40/Q60, which has a "real" ISA bus that accepts legacy
> ISA expansion cards (http://www.q40.de/).
Based on the nice description from James I have on my todo list
to cook up a patch to io.h to document this.
Had just not got around to do it yet.

Sam
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/