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mm: add link from struct lruvec to struct zone

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This is the first stage of struct mem_cgroup_zone removal.  Further
patches replace struct mem_cgroup_zone with a pointer to struct lruvec.

If CONFIG_CGROUP_MEM_RES_CTLR=n lruvec_zone() is just container_of().

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Konstantin Khlebnikov
2012-05-29 15:06:58 -07:00
committed by Linus Torvalds
parent 9e3b2f8cd3
commit 7f5e86c2cc
4 changed files with 30 additions and 10 deletions
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14
include/linux/mmzone.h
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@@ -201,6 +201,9 @@ struct zone_reclaim_stat {
struct lruvec {
struct list_head lists[NR_LRU_LISTS];
struct zone_reclaim_stat reclaim_stat;
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
struct zone *zone;
#endif
};
/* Mask used at gathering information at once (see memcontrol.c) */
@@ -729,6 +732,17 @@ extern int init_currently_empty_zone(struct zone *zone, unsigned long start_pfn,
unsigned long size,
enum memmap_context context);
extern void lruvec_init(struct lruvec *lruvec, struct zone *zone);
static inline struct zone *lruvec_zone(struct lruvec *lruvec)
{
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
return lruvec->zone;
#else
return container_of(lruvec, struct zone, lruvec);
#endif
}
#ifdef CONFIG_HAVE_MEMORY_PRESENT
void memory_present(int nid, unsigned long start, unsigned long end);
#else