Re: rename 'unused' in sys_iopl to somethign else, since it is used

[Andi Kleen]

On Tue, Jul 30, 2002 at 11:02:33AM +1000, Rusty Russell wrote:
> In message <[e-mail]> you write:
> > sys_iopl on i386 accepts one parameter, 'unsigned long unused'. Then
> > it goes ahead and uses it to get a pointer to struct pt_regs. This
> > patch changes its name to 'location'.=20
> 
> Hmmm.... Andi, the x86_64 version is different: do you really push one
> arg on the stack then the regs?  Please check...

level is in a register (rdi), but pt_regs is on the stack. The calling 
convention automatically switches to stack location for structures bigger 
than one register.  

On i386 it is probably cleanest when you need both pt_regs and arguments
to declare pt_regs only and get the first argument directly out of regs->ebx.

-Andi