linux-kernel - Re: [Xen-devel] Re: [PATCH 1/3] xen/granttable: Introducing grant table V2 stucture

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Message-ID: <4EC5CC3B.4050808@oracle.com>
Date:	Fri, 18 Nov 2011 11:08:43 +0800
From:	ANNIE LI <annie.li@...cle.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	"jeremy@...p.org" <jeremy@...p.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	"kurt.hackel@...cle.com" <kurt.hackel@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Paul Durrant <Paul.Durrant@...rix.com>
Subject: Re: [Xen-devel] Re: [PATCH 1/3] xen/granttable: Introducing grant
 table V2 stucture



On 2011-11-18 0:29, Konrad Rzeszutek Wilk wrote:
>>> The more normal way to do this would be to make gnttab_interface a
>>> pointer, define gnttab_v1_ops and do:
>>> 	gnttab_interface =&gnttab_v1_ops;
>>> or if the pointer overhead is significant remove that and just do a
>>> struct assignment:
>>> 	gnttab_interface = gnttab_v1_ops;
>>>
>> If using this way, we need two more public structures(gnttab_v1_ops
>> and gnttab_v2_ops), and two more functions to initialize those two
>> structures and then initialize the pointer gnttab_interface. It is
>> more complicated, am i missing something?
> Why two functions? I agree on the structures - but they need not to be
> public (they can be static).
>
> For a good example look at how apic_physflat is done.
Thanks, static structure is simpler and clean. I am very glad to change 
that.:-)

Thanks
Annie
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@...ts.xensource.com
> http://lists.xensource.com/xen-devel
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