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| author | Cody P Schafer <cody@linux.vnet.ibm.com> | 2013-02-23 01:35:21 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-24 02:50:20 +0100 |
| commit | 9127ab4ff92f0ecd7b4671efa9d0edb21c691e9f (patch) | |
| tree | dbf80a98e775d88378d93c0d20209374d6fac9b2 | |
| parent | mm/mlock.c: document scary-looking stack expansion mlock chain (diff) | |
| download | linux-9127ab4ff92f0ecd7b4671efa9d0edb21c691e9f.tar.xz linux-9127ab4ff92f0ecd7b4671efa9d0edb21c691e9f.zip | |
mm: add SECTION_IN_PAGE_FLAGS
Instead of directly utilizing a combination of config options to determine
this, add a macro to specifically address it.
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: David Hansen <dave@linux.vnet.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/mm.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index fe039bdba4ed..97da0302cf51 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -625,6 +625,10 @@ static inline enum zone_type page_zonenum(const struct page *page) return (page->flags >> ZONES_PGSHIFT) & ZONES_MASK; } +#if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP) +#define SECTION_IN_PAGE_FLAGS +#endif + /* * The identification function is only used by the buddy allocator for * determining if two pages could be buddies. We are not really @@ -708,7 +712,7 @@ static inline struct zone *page_zone(const struct page *page) return &NODE_DATA(page_to_nid(page))->node_zones[page_zonenum(page)]; } -#if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP) +#ifdef SECTION_IN_PAGE_FLAGS static inline void set_page_section(struct page *page, unsigned long section) { page->flags &= ~(SECTIONS_MASK << SECTIONS_PGSHIFT); @@ -738,7 +742,7 @@ static inline void set_page_links(struct page *page, enum zone_type zone, { set_page_zone(page, zone); set_page_node(page, node); -#if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP) +#ifdef SECTION_IN_PAGE_FLAGS set_page_section(page, pfn_to_section_nr(pfn)); #endif } |