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xen-devel
[Xen-devel] Re: [PATCH 2/3] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN
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To: |
Daniel Kiper <dkiper@xxxxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH 2/3] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro |
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From: |
David Rientjes <rientjes@xxxxxxxxxx> |
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Date: |
Mon, 28 Mar 2011 15:46:27 -0700 (PDT) |
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Cc: |
jeremy@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, ian.campbell@xxxxxxxxxx, haicheng.li@xxxxxxxxxxxxxxx, konrad.wilk@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, dan.magenheimer@xxxxxxxxxx, v.tolstov@xxxxxxxxx, dave@xxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, andi.kleen@xxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, fengguang.wu@xxxxxxxxx, wdauchy@xxxxxxxxx |
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Wed, 06 Apr 2011 18:25:53 -0700 |
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Alpine 2.00 (DEB 1167 2008-08-23) |
On Mon, 28 Mar 2011, Daniel Kiper wrote:
> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
> index 02ecb01..d342820 100644
> --- a/include/linux/mmzone.h
> +++ b/include/linux/mmzone.h
> @@ -931,6 +931,9 @@ static inline unsigned long early_pfn_to_nid(unsigned
> long pfn)
> #define pfn_to_section_nr(pfn) ((pfn) >> PFN_SECTION_SHIFT)
> #define section_nr_to_pfn(sec) ((sec) << PFN_SECTION_SHIFT)
>
> +#define SECTION_ALIGN_UP(pfn) (((pfn) + PAGES_PER_SECTION - 1) &
> PAGE_SECTION_MASK)
> +#define SECTION_ALIGN_DOWN(pfn) ((pfn) & PAGE_SECTION_MASK)
> +
> #ifdef CONFIG_SPARSEMEM
>
> /*
These are only valid for CONFIG_SPARSEMEM, so they need to be defined
conditionally.
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