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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2009-03-31 18:19:31 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 11:59:11 -0400
commitee99c71c59f897436ec65debb99372b3146f9985 (patch)
tree051f1c43b7c7658689d4b2c23b3d8585d6464a89 /include
parenta6dc60f8975ad96d162915e07703a4439c80dcf0 (diff)
mm: introduce for_each_populated_zone() macro
Impact: cleanup In almost cases, for_each_zone() is used with populated_zone(). It's because almost function doesn't need memoryless node information. Therefore, for_each_populated_zone() can help to make code simplify. This patch has no functional change. [akpm@linux-foundation.org: small cleanup] Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mmzone.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 1aca6cebbb78..26ef24076b76 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -806,6 +806,14 @@ extern struct zone *next_zone(struct zone *zone);
806 zone; \ 806 zone; \
807 zone = next_zone(zone)) 807 zone = next_zone(zone))
808 808
809#define for_each_populated_zone(zone) \
810 for (zone = (first_online_pgdat())->node_zones; \
811 zone; \
812 zone = next_zone(zone)) \
813 if (!populated_zone(zone)) \
814 ; /* do nothing */ \
815 else
816
809static inline struct zone *zonelist_zone(struct zoneref *zoneref) 817static inline struct zone *zonelist_zone(struct zoneref *zoneref)
810{ 818{
811 return zoneref->zone; 819 return zoneref->zone;