Re: [PATCH v3 01/15] h8300: Assembly headers.
From: Yoshinori Sato
Date: Tue Feb 17 2015 - 02:39:51 EST
At Sun, 15 Feb 2015 10:11:58 +0100,
Geert Uytterhoeven wrote:
> Hi Sato-san,
> On Sun, Feb 15, 2015 at 8:49 AM, Yoshinori Sato
> <ysato@xxxxxxxxxxxxxxxxxxxx> wrote:
> > --- /dev/null
> > +++ b/arch/h8300/include/asm/io.h
> > @@ -0,0 +1,372 @@
> > +#ifndef _H8300_IO_H
> > +#define _H8300_IO_H
> > +
> > +#ifdef __KERNEL__
> > +
> > +#include <linux/types.h>
> > +
> > +/*
> > + * These are for ISA/PCI shared memory _only_ and should never be used
> > + * on any other type of memory, including Zorro memory. They are meant to
> > + * access the bus in the bus byte order which is little-endian!.
> > + *
> > + * readX/writeX() are used to access memory mapped devices. On some
> > + * architectures the memory mapped IO stuff needs to be accessed
> > + * differently. On the m68k architecture, we just read/write the
> > + * memory location directly.
> > + */
> > +/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
> > + * two accesses to memory, which may be undesirable for some devices.
> > + */
> While some of the above applies to h8300, I think you should remove
> the parts that don't apply.
It's necessary by several drivers, so it has been left.
An unnecessary part is also included, so I have to remove the part.
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
> 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
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