linux-kernel - Re: [Xen-devel] [PATCH 4/7] xen: The entrance for PV extension of HVM

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Date:	Mon, 01 Mar 2010 17:05:36 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Sheng Yang <sheng@...ux.intel.com>
CC:	Keir Fraser <keir.fraser@...citrix.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Ian Pratt <Ian.Pratt@...citrix.com>,
	xen-devel <xen-devel@...ts.xensource.com>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>
Subject: Re: [Xen-devel] [PATCH 4/7] xen: The entrance for PV extension of
 HVM

On 03/01/2010 01:38 AM, Sheng Yang wrote:
> xen_guest_init() would setup the environment.
>
> Cc: Ingo Molnar<mingo@...e.hu>
> Signed-off-by: Sheng Yang<sheng@...ux.intel.com>
> ---
>   arch/x86/kernel/setup.c |    8 ++++++++
>   1 files changed, 8 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
> index 5d9e40c..2b61d46 100644
> --- a/arch/x86/kernel/setup.c
> +++ b/arch/x86/kernel/setup.c
> @@ -113,6 +113,10 @@
>   #endif
>   #include<asm/mce.h>
>
> +#ifdef CONFIG_XEN
> +#include<xen/xen.h>
> +#endif
>    

No #ifdefs; put them in xen.h if necessary (which they aren't).  This 
probably isn't the right header anyway; this is specifically for testing 
the presence of Xen and/or the current domain type.  It shouldn't have 
any other prototypes in it, or include anything else (it probably 
already includes too much).  Given this is already x86-specific code, 
include asm/xen/something.h.

> +
>   /*
>    * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
>    * The direct mapping extends to max_pfn_mapped, so that we can directly access
> @@ -740,6 +744,10 @@ void __init setup_arch(char **cmdline_p)
>
>   	x86_init.oem.arch_setup();
>
> +#ifdef CONFIG_XEN
> +	xen_guest_init();
> +#endif
>    

Again, no #ifdefs here.  Put an #ifdeffed stub in an appropriate header.

     J
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