[Xen-devel] Re: [PATCH 2/3] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro

[David Rientjes <rientjes@xxxxxxxxxx>]

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.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel