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

Sam Ravnborg sam at ravnborg.org
Tue Aug 5 02:14:26 PDT 2014

> >
> > 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.


More information about the linux-arm-kernel mailing list