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[PATCH] mm: add populated_zone() helper

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There are numerous places we check whether a zone is populated or not.

Provide a helper function to check for populated zones and convert all
checks for zone->present_pages.

Signed-off-by: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Con Kolivas
2006-01-06 00:11:15 -08:00
committed by Linus Torvalds
parent 80bfed904c
commit f3fe65122d
3 changed files with 13 additions and 8 deletions
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5
include/linux/mmzone.h
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@@ -388,6 +388,11 @@ static inline struct zone *next_zone(struct zone *zone)
#define for_each_zone(zone) \
for (zone = pgdat_list->node_zones; zone; zone = next_zone(zone))
static inline int populated_zone(struct zone *zone)
{
return (!!zone->present_pages);
}
static inline int is_highmem_idx(int idx)
{
return (idx == ZONE_HIGHMEM);