Re: uml and -regparm=3

Andi Kleen
2008-01-10T02:34:38Z

On Wed, Jan 09, 2008 at 09:14:04PM -0500, Jeff Dike wrote:
> On Wed, Jan 09, 2008 at 10:50:48PM +0100, Miklos Szeredi wrote:
> > > FASTCALL is useless and should not make a difference. It enables
> > > regparm on specific functions, but that should not make a difference
> > > if it works or not.
> >
> > __down_write() in include/asm-x86/rwsem.h seems to assume, that the
> > semaphore pointer is passed in %eax down to rwsem_down_write_failed(),
> > so regparm does make a difference there.
>
> And rwsem_down_write_failed seems to think it's getting the pointer in
> %eax:

That's a left over from when it was called by magic inline assembly.
I suspect it would be better to switch it just over to stack args
for consistent and then declare it asmlinkage

-Andi