linux-kernel - Re: [Xen-devel] [PATCH] xen/p2m: Export set_phys_to

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Message-Id: <5229FD6A02000078000F119C@nat28.tlf.novell.com>
Date:	Fri, 06 Sep 2013 15:06:02 +0100
From:	"Jan Beulich" <JBeulich@...e.com>
To:	"Konrad Rzeszutek Wilk" <konrad.wilk@...cle.com>
Cc:	<david.vrabel@...rix.com>,
	"xen-devel" <xen-devel@...ts.xenproject.org>,
	<boris.ostrovsky@...cle.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH] xen/p2m: Export set_phys_to_machine.

>>> On 06.09.13 at 16:00, Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> wrote:
> We have already exported 'get_phys_to_machine' and there are
> third-party drivers that depend on this other symbol. As such
> lets make this balanced and also export this symbol.

I tend to disagree: Allowing external modules read access to some
internal state is quite different from also allowing them to alter it.

Jan

> Reported-by: Yuval Shaia <yuval.shaia@...cle.com>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> ---
>  arch/x86/xen/p2m.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
> index 0d4ec35..cdb96bc 100644
> --- a/arch/x86/xen/p2m.c
> +++ b/arch/x86/xen/p2m.c
> @@ -847,6 +847,7 @@ bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
>  
>  	return true;
>  }
> +EXPORT_SYMBOL_GPL(set_phys_to_machine);
>  
>  #define M2P_OVERRIDE_HASH_SHIFT	10
>  #define M2P_OVERRIDE_HASH	(1 << M2P_OVERRIDE_HASH_SHIFT)
> -- 
> 1.8.3.1
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@...ts.xen.org 
> http://lists.xen.org/xen-devel 



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