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authorCody P Schafer <cody@linux.vnet.ibm.com>2013-02-22 16:35:21 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-23 17:50:20 -0800
commit9127ab4ff92f0ecd7b4671efa9d0edb21c691e9f (patch)
treedbf80a98e775d88378d93c0d20209374d6fac9b2
parent4805b02e90187c68d8f4e3305c3482b797e35809 (diff)
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.h8
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
}