mm: remove lru type checks from __isolate_lru_page()

After patch "mm: forbid lumpy-reclaim in shrink_active_list()" we can
completely remove anon/file and active/inactive lru type filters from
__isolate_lru_page(), because isolation for 0-order reclaim always
isolates pages from right lru list.  And pages-isolation for lumpy
shrink_inactive_list() or memory-compaction anyway allowed to isolate
pages from all evictable lru lists.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Glauber Costa <glommer@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 7 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 1b89861eedc0..5c4880bc027a 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -209,16 +209,12 @@ struct lruvec {
 #define LRU_ALL_EVICTABLE (LRU_ALL_FILE | LRU_ALL_ANON)
 #define LRU_ALL      ((1 << NR_LRU_LISTS) - 1)
 
-/* Isolate inactive pages */
-#define ISOLATE_INACTIVE        ((__force isolate_mode_t)0x1)
-/* Isolate active pages */
-#define ISOLATE_ACTIVE          ((__force isolate_mode_t)0x2)
 /* Isolate clean file */
-#define ISOLATE_CLEAN           ((__force isolate_mode_t)0x4)
+#define ISOLATE_CLEAN           ((__force isolate_mode_t)0x1)
 /* Isolate unmapped file */
-#define ISOLATE_UNMAPPED        ((__force isolate_mode_t)0x8)
+#define ISOLATE_UNMAPPED        ((__force isolate_mode_t)0x2)
 /* Isolate for asynchronous migration */
-#define ISOLATE_ASYNC_MIGRATE   ((__force isolate_mode_t)0x10)
+#define ISOLATE_ASYNC_MIGRATE   ((__force isolate_mode_t)0x4)
 
 /* LRU Isolation modes. */
 typedef unsigned __bitwise__ isolate_mode_t;