Re: [RFC, Announce] Unified x86 architecture, arch/x86

[Adrian Bunk <bunk@stusta.de>]

On Sat, Jul 21, 2007 at 09:42:48AM +0200, Andi Kleen wrote:
> On Saturday 21 July 2007 09:35:33 Adrian Bunk wrote:
> 
> > The problem with the current "merging" is that it's extremely hard to 
> > figure out whether some code in x86_64 might be using some code in i386 
> > since there are currently 5 (five) different mechanisms used for sharing 
> > code between the two architectures.
> > 
> > It happens so often that someone accidentally breaks one architecture 
> > because he didn't notice the code also gets used on the other 
> > architecture.
> 
> That's not changing at all. Especially with even more sharing, (than I think
> would be prudent) like Thomas treated, you'll likely have to test compile both
> for most changes.

It's not about compilation, it's about seeing that this code might be 
shared.

When e.g. changing a file under arch/i386/kernel/cpu/mtrr/ it's highly 
surprising that this file might also be used on x86_64.

> -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