linux-kernel - Re: [PATCH 11/11] Unplug emulated disks and nics

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Message-ID: <alpine.DEB.2.00.1005261325110.25605@kaball-desktop>
Date:	Wed, 26 May 2010 13:27:26 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
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>,
	Don Dutile <ddutile@...hat.com>
Subject: Re: [PATCH 11/11] Unplug emulated disks and nics

On Tue, 25 May 2010, Jeremy Fitzhardinge wrote:
> Could you give this a bit more of a descriptive name, type and/or
> comment?  What is it indicating about the xen_platform_pci driver?  That
> it has been detected?  That it is in use?  That it can be used?  Is it
> boolean, or can it have any value?
> 
> 

It is boolean and it signals that the xen platform pci device can be
used. I'll add a comment and rename it to xen_platform_pci_enabled.


> > + */
> > +
> > +#ifndef _XEN_PLATFORM_PCI_H
> > +#define _XEN_PLATFORM_PCI_H
> > +
> > +#include <linux/version.h>
> >
> Why?
> 

It is needed for LINUX_VERSION_CODE, see below:

> > +
> > +#define XEN_IOPORT_MAGIC_VAL 0x49d2
> > +#define XEN_IOPORT_LINUX_PRODNUM 0xffff
> > +#define XEN_IOPORT_LINUX_DRVVER  ((LINUX_VERSION_CODE << 8) + 0x0)
> > +
> > +extern int xen_platform_pci;
> >
> 
> I still think these headers should be folded together.  There's no point
> in having them separate.  They describe an ABI, so there's no need to
> keep the files in sync with the master Xen sources (since the ABI will
> never change).
 
All right, I also agree with the other comments.
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