linux-kernel - RE: [PATCH 1/2] xen/granttable: Support sub-page grants

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Message-ID: <1323251849.23681.128.camel@zakaz.uk.xensource.com>
Date:	Wed, 7 Dec 2011 09:57:29 +0000
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	Paul Durrant <Paul.Durrant@...rix.com>
CC:	ANNIE LI <annie.li@...cle.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>,
	"jeremy@...p.org" <jeremy@...p.org>,
	"kurt.hackel@...cle.com" <kurt.hackel@...cle.com>
Subject: RE: [PATCH 1/2] xen/granttable: Support sub-page grants

On Wed, 2011-12-07 at 08:59 +0000, Paul Durrant wrote:
> > gnttab_v2_ops = {
> >   ...
> > .access_subpage = access_subpage_v2;
> > .access_ref_subpage = access_ref_subpage_v2; .access_trans =
> > access_trans_v2; .access_ref_trans = access_ref_trans_v2; }
> > 
> 
> 
> Do you need ops for the ref and non-ref functions? I would have
> thought you could just have the ref ones since the all the non-ref
> variants do is allocate and then call the ref variant.

Good point. It appears that all the existing ops are only present in the
ref form.

Ian.


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