mm/vmscan.c: use update_lru_size() in update_lru_sizes()

We already defined the helper update_lru_size().

Let's use this to reduce code duplication.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Link: http://lkml.kernel.org/r/20200331221550.1011-1-richard.weiyang@gmail.comSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/vmscan.c

@@ -1602,10 +1602,7 @@ static __always_inline void update_lru_sizes(struct lruvec *lruvec,
 		if (!nr_zone_taken[zid])
 			continue;
 
-		__update_lru_size(lruvec, lru, zid, -nr_zone_taken[zid]);
-#ifdef CONFIG_MEMCG
-		mem_cgroup_update_lru_size(lruvec, lru, zid, -nr_zone_taken[zid]);
-#endif
+		update_lru_size(lruvec, lru, zid, -nr_zone_taken[zid]);
 	}
 
 }