On Wed, Jun 26, 2013 at 11:38 AM, Richard Weinberger <rich...@nod.at> wrote:
>> Since the API itself already contents the meaning: "return NULL means
>> the arch has no related io memory",
No, NULL means it could not map the I/O memory.
>> Why not define a generic dummy one in "include/asm-generic/io.h" instead
>> of "HAS_IOMEM" (which has already spread many various places, and also,
>> most of new drivers have to know about it).
>>
>> e.g: in "include/asm-generic/io.h", if "CONFIG_HAS_IOMEM=n", define a
>> dummy ioremap() which return NULL ... (also need consider more details).
>
> Because we don't even want to build these drivers and not make them fail while
> executing io memory related functions.
Indeed, it doesn't make sense to build drivers that cannot work.
And they may fail in a very bad way.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-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
------------------------------------------------------------------------------
This SF.net email is sponsored by Windows:
Build for Windows Store.
http://p.sf.net/sfu/windows-dev2dev
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
