linux-kernel - Re: [Xen-devel] [PATCH 4/8] xen: Use the correctly the Xen memory terminologies

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Message-ID: <20150729113901.GB7962@zion.uk.xensource.com>
Date:	Wed, 29 Jul 2015 12:39:01 +0100
From:	Wei Liu <wei.liu2@...rix.com>
To:	Julien Grall <julien.grall@...rix.com>
CC:	Wei Liu <wei.liu2@...rix.com>, <linux-fbdev@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	<stefano.stabellini@...citrix.com>,
	Russell King <linux@....linux.org.uk>,
	<linux-scsi@...r.kernel.org>, <x86@...nel.org>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Jiri Slaby <jslaby@...e.com>, <xen-devel@...ts.xenproject.org>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	<linux-input@...r.kernel.org>, <ian.campbell@...rix.com>,
	"James E.J. Bottomley" <JBottomley@...n.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Ingo Molnar <mingo@...hat.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	Juergen Gross <jgross@...e.com>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	<linux-kernel@...r.kernel.org>,
	David Vrabel <david.vrabel@...rix.com>,
	<netdev@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
	Roger Pau Monné <roger.pau@...rix.com>
Subject: Re: [Xen-devel] [PATCH 4/8] xen: Use the correctly the Xen memory
 terminologies

On Wed, Jul 29, 2015 at 12:35:54PM +0100, Julien Grall wrote:
> Hi Wei,
> 
> On 29/07/15 11:13, Wei Liu wrote:
> > On Tue, Jul 28, 2015 at 04:02:45PM +0100, Julien Grall wrote:
> > [...]
> >> diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
> >> index 7d50711..3b7b7c3 100644
> >> --- a/drivers/net/xen-netback/netback.c
> >> +++ b/drivers/net/xen-netback/netback.c
> >> @@ -314,7 +314,7 @@ static void xenvif_gop_frag_copy(struct xenvif_queue *queue, struct sk_buff *skb
> >>  		} else {
> >>  			copy_gop->source.domid = DOMID_SELF;
> >>  			copy_gop->source.u.gmfn =
> >> -				virt_to_mfn(page_address(page));
> >> +				virt_to_gfn(page_address(page));
> >>  		}
> >>  		copy_gop->source.offset = offset;
> >>  
> >> @@ -1284,7 +1284,7 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
> >>  		queue->tx_copy_ops[*copy_ops].source.offset = txreq.offset;
> >>  
> >>  		queue->tx_copy_ops[*copy_ops].dest.u.gmfn =
> >> -			virt_to_mfn(skb->data);
> >> +			virt_to_gfn(skb->data);
> >>  		queue->tx_copy_ops[*copy_ops].dest.domid = DOMID_SELF;
> >>  		queue->tx_copy_ops[*copy_ops].dest.offset =
> >>  			offset_in_page(skb->data);
> > 
> > Reviewed-by: Wei Liu <wei.liu2@...rix.com>
> > 
> > One possible improvement is to change gmfn in copy_gop to gfn as well.
> > But that's outside of netback code.
> 
> The structure gnttab_copy is part of the hypervisor interface. Is it
> fine to differ on the naming between Xen and Linux?
> 
> Or maybe we could do the change in the public headers in Xen repo too.
> Is it fine to do field renaming in public headers?
> 

Oh well. Never mind then. I mistook that structure as internal to Linux.

Wei.

> Regards,
> 
> -- 
> Julien Grall
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