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From: Hubertus Franke <frankeh@watson.ibm.com>
Reply-To: frankeh@watson.ibm.com
Organization: IBM Research
To: george anzinger <george@mvista.com>, Joel Becker <jlbec@evilplan.org>
Subject: Re: [Lse-tech] Re: [PATCH] Re: futex and timeouts
Date: Mon, 18 Mar 2002 16:35:03 -0500
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On Friday 15 March 2002 08:12 pm, george anzinger wrote:
> Joel Becker wrote:
> > On Fri, Mar 15, 2002 at 01:59:38PM -0500, Hubertus Franke wrote:
> > > > > What I would like to see is an interface that lets me pass optional
> > > > > parameters to the syscall interface, so I can call with different
> > > > > number of parameters.
> > > >
> > > >     Is this to lock multiple futexes "atomically"?  If we are
> > > > looking for a fast path stack-wise, this seems extra work.
> > >
> > > No, take for example...
> > >
> > > syscall3(int,futex,int,op, struct futex*, futex, int opt_arg);
>
> I don't think there is anything "broken" in defining more than one
> syscall stub to the same system call, each with a different parameter
> count (or completely different arguments).  The call code will need to
> be able to figure it out, but there is nothing in the way as far as
> doing it.
>
> -g
>

Ofcourse, no difficulties here, but no convenient way either, as the 
__NR_futex is automatically used.

-- 
-- Hubertus Franke  (frankeh@watson.ibm.com)