linux-kernel - Re: [PATCH v2 21/23] xen: update xen_add_to

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Date:	Wed, 8 Aug 2012 18:22:50 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	"Tim (Xen.org)" <tim@....org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linaro-dev@...ts.linaro.org" <linaro-dev@...ts.linaro.org>,
	"catalin.marinas@....com" <catalin.marinas@....com>,
	"arnd@...db.de" <arnd@...db.de>
Subject: Re: [PATCH v2 21/23] xen: update xen_add_to_physmap interface

On Tue, 7 Aug 2012, Konrad Rzeszutek Wilk wrote:
> On Mon, Aug 06, 2012 at 03:27:24PM +0100, Stefano Stabellini wrote:
> > Update struct xen_add_to_physmap to be in sync with Xen's version of the
> > structure.
> > The size field was introduced by:
> > 
> > changeset:   24164:707d27fe03e7
> > user:        Jean Guyader <jean.guyader@...citrix.com>
> > date:        Fri Nov 18 13:42:08 2011 +0000
> > summary:     mm: New XENMEM space, XENMAPSPACE_gmfn_range
> > 
> > According to the comment:
> > 
> > "This new field .size is located in the 16 bits padding between .domid
> > and .space in struct xen_add_to_physmap to stay compatible with older
> > versions."
> > 
> > Changes in v2:
> 
> Looks good. Let me take this as in my tree to prep it for Mukesh's patches.

OK.
Beware that patch #23 is going to modify xen_add_to_physmap again to
replace .size with a union.


> > - remove erroneous comment in the commit message.
> > 
> > Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
> > ---
> >  include/xen/interface/memory.h |    3 +++
> >  1 files changed, 3 insertions(+), 0 deletions(-)
> > 
> > diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h
> > index b5c3098..b66d04c 100644
> > --- a/include/xen/interface/memory.h
> > +++ b/include/xen/interface/memory.h
> > @@ -163,6 +163,9 @@ struct xen_add_to_physmap {
> >      /* Which domain to change the mapping for. */
> >      domid_t domid;
> >  
> > +    /* Number of pages to go through for gmfn_range */
> > +    uint16_t    size;
> > +
> >      /* Source mapping space. */
> >  #define XENMAPSPACE_shared_info 0 /* shared info page */
> >  #define XENMAPSPACE_grant_table 1 /* grant table page */
> > -- 
> > 1.7.2.5
> 
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