Re: [RFC PATCH] x86: Unify include/asm-x86/linkage_[32|64].h

[Adrian Bunk]

On Wed, Dec 05, 2007 at 11:18:45AM +0100, Ingo Molnar wrote:
> 
> * Adrian Bunk <bunk@xxxxxxxxx> wrote:
> 
> > On Tue, Dec 04, 2007 at 07:19:45PM -0500, Jeff Dike wrote:
> > > On Wed, Dec 05, 2007 at 12:15:19AM +0100, Adrian Bunk wrote:
> > > > UML can't switch to the regparm(3) convention on i386 since it links 
> > > > with userspace code, so if assembler code uses this calling convention 
> > > > we need the C prototype of it annotated accordingly.
> > > 
> > > We're not talking about a global calling convention switch, right?
> > > We're talking about selected functions only, in which case, the fact
> > > that UML links against libc is irrelevant.
> > 
> > The non-UML i386 switched to globally using the regparm(3) calling 
> > convention in 2.6.20.
> 
> maybe i'm a bit dense, but why cannot UML switch to -mregparm=3 too?

The UML kernel is linked against libc...

> 	Ingo

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

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