Messages in this thread Patch in this message | | | Date | Mon, 2 May 2011 23:47:16 +0200 | From | Daniel Kiper <> | Subject | [PATCH V2 1/1] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro |
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Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro which aligns given pfn to upper section and lower section boundary accordingly.
Signed-off-by: Daniel Kiper <dkiper@net-space.pl> --- include/linux/mmzone.h | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index d715200..217bcf6 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -956,6 +956,9 @@ 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) + struct page; struct page_cgroup; struct mem_section { -- 1.5.6.5
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