linux-kernel - Re: [PATCH 4/6] xen: correctly use xen_pfn_t in remap_domain_mfn

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Date:	Thu, 18 Oct 2012 14:23:35 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Ian Campbell <ian.campbell@...rix.com>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	Mukesh Rathor <mukesh.rathor@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xen.org" <xen-devel@...ts.xen.org>
Subject: Re: [PATCH 4/6] xen: correctly use xen_pfn_t in
 remap_domain_mfn_range.

On Wed, 17 Oct 2012, Ian Campbell wrote:
> For Xen on ARM a PFN is 64 bits so we need to use the appropriate
> type here.
> 
> Signed-off-by: Ian Campbell <ian.campbell@...rix.com>

Acked-by: Stefano Stabellini <stefano.stabellini@...citrix.com>

In general every mfn/pfn type should be xen_pfn_t, we might have to do a
closer audit of the code.


>  arch/x86/xen/mmu.c    |    2 +-
>  include/xen/xen-ops.h |    2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
> index 1c5812b..d779e96 100644
> --- a/arch/x86/xen/mmu.c
> +++ b/arch/x86/xen/mmu.c
> @@ -2603,7 +2603,7 @@ static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token,
>  
>  int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
>  			       unsigned long addr,
> -			       unsigned long mfn, int nr,
> +			       xen_pfn_t mfn, int nr,
>  			       pgprot_t prot, unsigned domid,
>  			       struct page **pages)
>  
> diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
> index 6a40253..dc63e80 100644
> --- a/include/xen/xen-ops.h
> +++ b/include/xen/xen-ops.h
> @@ -26,7 +26,7 @@ void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order);
>  struct vm_area_struct;
>  int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
>  			       unsigned long addr,
> -			       unsigned long mfn, int nr,
> +			       xen_pfn_t mfn, int nr,
>  			       pgprot_t prot, unsigned domid,
>  			       struct page **pages);
>  int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
> -- 
> 1.7.2.5
> 
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