linux-kernel - Re: [PATCH 1/6] lguest: host code tidyups

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Message-Id: <1179271936.23574.2.camel@localhost.localdomain>
Date:	Wed, 16 May 2007 09:32:16 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>,
	virtualization <virtualization@...ts.linux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>, hch <hch@...radead.org>
Subject: Re: [PATCH 1/6] lguest: host code tidyups

On Tue, 2007-05-15 at 21:47 +1000, Stephen Rothwell wrote:
> On Tue, 15 May 2007 21:42:35 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> >
> > On Tue, 15 May 2007 11:17:07 +1000 Rusty Russell <rusty@...tcorp.com.au> wrote:
> > > -		on_each_cpu(adjust_pge, 0, 0, 1);
> > > +		on_each_cpu(adjust_pge, (void *)0, 0, 1);
> >
> > Sorry?  What ever happened to a simple NULL?
> 
> Oh, I guess that is an explicit (numeric) 0 (of some type) caste to
> "void *" because of the prototype - rather than not passing anything?

Indeed.  We really want to pass a bool, but on_each_cpu uses a void *.
Hence the clearest solution seemed "(void *)0" and "(void *)1" in the
callers.

Thanks,
Rusty.


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