Re: [2.6 patch] fix sched_setscheduler semantics

[Alan Cox <alan@lxorguk.ukuu.org.uk>]

On Maw, 2006-01-17 at 01:52 +0300, Alexey Dobriyan wrote:
> On Mon, Jan 16, 2006 at 05:17:55PM -0500, Jason Baron wrote:
> > --- linux-2.6/kernel/sched.c.bak
> > +++ linux-2.6/kernel/sched.c
> > @@ -3824,6 +3824,10 @@ do_sched_setscheduler(pid_t pid, int pol
> >  asmlinkage long sys_sched_setscheduler(pid_t pid, int policy,
> >  				       struct sched_param __user *param)
> >  {
> > +	/* negative values for policy are not valid */
> > +	if (policy < 0)
> > +		return -EINVAL;
> 
> Classical redundant comment.

Disagree. A pointless comment would be "if policy is negative return
-EINVAL". The comment makes it clear that policy < 0 is *invalid* as a
syscall argument rather than just something not currently handled, or
being done for algorithmic reasons

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