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authorChristoph Lameter <clameter@sgi.com>2006-09-25 23:31:13 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 08:48:46 -0700
commit2f1b6248682f8b39ca3c7e549dfc216d26c4109b (patch)
tree2340347d10fd0e564fb8527efe3ffbcb216e1906 /include/linux/mm.h
parent98d2b0ebda72fc39cdefd3720d50b9b3ce409085 (diff)
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[PATCH] reduce MAX_NR_ZONES: use enum to define zones, reformat and comment
Use enum for zones and reformat zones dependent information Add comments explaning the use of zones and add a zones_t type for zone numbers. Line up information that will be #ifdefd by the following patches. [akpm@osdl.org: comment cleanups] Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 45678b0..2db4229 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -470,7 +470,7 @@ void split_page(struct page *page, unsigned int order);
#define SECTIONS_MASK ((1UL << SECTIONS_WIDTH) - 1)
#define ZONETABLE_MASK ((1UL << ZONETABLE_SHIFT) - 1)
-static inline unsigned long page_zonenum(struct page *page)
+static inline enum zone_type page_zonenum(struct page *page)
{
return (page->flags >> ZONES_PGSHIFT) & ZONES_MASK;
}
@@ -499,11 +499,12 @@ static inline unsigned long page_to_section(struct page *page)
return (page->flags >> SECTIONS_PGSHIFT) & SECTIONS_MASK;
}
-static inline void set_page_zone(struct page *page, unsigned long zone)
+static inline void set_page_zone(struct page *page, enum zone_type zone)
{
page->flags &= ~(ZONES_MASK << ZONES_PGSHIFT);
page->flags |= (zone & ZONES_MASK) << ZONES_PGSHIFT;
}
+
static inline void set_page_node(struct page *page, unsigned long node)
{
page->flags &= ~(NODES_MASK << NODES_PGSHIFT);
@@ -515,7 +516,7 @@ static inline void set_page_section(struct page *page, unsigned long section)
page->flags |= (section & SECTIONS_MASK) << SECTIONS_PGSHIFT;
}
-static inline void set_page_links(struct page *page, unsigned long zone,
+static inline void set_page_links(struct page *page, enum zone_type zone,
unsigned long node, unsigned long pfn)
{
set_page_zone(page, zone);