Re: FUTEX_CMP_REQUEUE and 6-argument syscall

[Pete Zaitcev <zaitcev@redhat.com>]

On Thu, 3 Jun 2004 14:26:30 -0700
"David S. Miller" <davem@redhat.com> wrote:

> > 6 is the limit on o32 MIPS where we pass 4 arguments in registers and two
> > on the stack but it would be easy to extend that.  On 64-bit kernels we
> > only use upto 8 register arguments but no stack arguments ever so I hope
> > we don't exceed that limit ever ...
> 
> 6 is the limit on Sparc/Sparc64 as well, registers %o0 - %o5 carry
> arguments.

It seems that bumping the limit just to 6 would bring s390 in line
with sparcs, this is why I even considered using %r7 to pass the
argument itself instead of a pointer to stack. It's such a bother
to have things in memory.

-- Pete

P.S. Ralf, et. al.: do not forget to keep me on the cc: list, please.