linux-kernel - Re: [PATCH v3 01/15] h8300: Assembly headers.

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Date:	Tue, 17 Feb 2015 16:39:42 +0900
From:	Yoshinori Sato <ysato@...rs.sourceforge.jp>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH v3 01/15] h8300: Assembly headers.

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@...rs.sourceforge.jp> 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.

> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
> 
> 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

-- 
Yoshinori Sato
<ysato@...rs.sourceforge.jp>
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