Messages in this thread | | | Date | Wed, 18 May 2011 20:21:23 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro |
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On Tue, 17 May 2011, Daniel Kiper wrote:
> 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 {
These seem useful. Could you convert the code in drivers/base/node.c, mm/page_cgroup.c, mm/page_alloc.c, and mm/sparse.c that already do this to use the new macros?
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