memcg: rename mem_cgroup_zone_nr_pages() to mem_cgroup_zone_nr_lru_pages()

The caller of the function has been renamed to zone_nr_lru_pages(), and
this is just fixing up in the memcg code.  The current name is easily to
be mis-read as zone's total number of pages.
Signed-off-by: NYing Han <yinghan@google.com>
Acked-by: NJohannes Weiner <hannes@cmpxchg.org>
Acked-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: NMinchan Kim <minchan.kim@gmail.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

include/linux/memcontrol.h

@@ -107,7 +107,7 @@ extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
-unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
+unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
 						struct zone *zone,
 						enum lru_list lru);
 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
@@ -304,7 +304,7 @@ mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
 }
 
 static inline unsigned long
-mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
+mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, struct zone *zone,
 			     enum lru_list lru)
 {
 	return 0;

mm/memcontrol.c

@@ -1078,7 +1078,7 @@ int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
 	return (active > inactive);
 }
 
-unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
+unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
 						struct zone *zone,
 						enum lru_list lru)
 {

mm/vmscan.c

@@ -173,7 +173,7 @@ static unsigned long zone_nr_lru_pages(struct zone *zone,
 				struct scan_control *sc, enum lru_list lru)
 {
 	if (!scanning_global_lru(sc))
-		return mem_cgroup_zone_nr_pages(sc->mem_cgroup, zone, lru);
+		return mem_cgroup_zone_nr_lru_pages(sc->mem_cgroup, zone, lru);
 
 	return zone_page_state(zone, NR_LRU_BASE + lru);
 }