lkml.org 
[lkml]   [2004]   [Nov]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [discuss] RFC: let x86_64 no longer define X86
On Fri, Nov 19, 2004 at 01:40:55PM +0100, Andi Kleen wrote:

> > The most important improvement would be to prevent such bugs and to have
> > the X86_64 dependency explicitely stated.
>
> This would just end up with me having to hunt through all the drivers
> all the time and enabling drivers that need to be enabled on x86-64 too.
>
> It's much easier to disable the few drivers that are broken with !X86_64.
>...

The issue you describe only occurs when a new dependency on X86 is
added. It is not a problem for the common case that a driver is portable
and therefore available on all architectures.

If the driver also works on X86_64, adding a " || X86_64" is trivial.
In the worst case, a new driver is not available on X86_64 until this is
added to the dependencies.

But the current setup might cause real bugs.

If one new user of CONFIG_LBD wouldn't additionally (and not strictly
required) check BITS_PER_LONG, it might currently have unwanted effects
on X86_64. Explicite annotations with X86_64 if it works on this
architecture would prevent such bugs.

> -Andi

cu
Adrian

--

"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed

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

\
 
 \ /
  Last update: 2005-03-22 14:08    [W:0.159 / U:0.436 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site