mm/vmscan: make inactive_anon/file_is_low return bool

Make inactive_anon/file_is_low return bool due to these particular
functions only using either one or zero as their return value.

No functional change.

Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 773fc8db75d256cb74e34e67c351a92014155963..38d04810e0eeb33797a170b32945ba7b677e7b79 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1859,7 +1859,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
 }
 
 #ifdef CONFIG_SWAP
-static int inactive_anon_is_low_global(struct zone *zone)
+static bool inactive_anon_is_low_global(struct zone *zone)
 {
        unsigned long active, inactive;
 
@@ -1876,14 +1876,14 @@ static int inactive_anon_is_low_global(struct zone *zone)
  * Returns true if the zone does not have enough inactive anon pages,
  * meaning some active anon pages need to be deactivated.
  */
-static int inactive_anon_is_low(struct lruvec *lruvec)
+static bool inactive_anon_is_low(struct lruvec *lruvec)
 {
        /*
         * If we don't have swap space, anonymous page deactivation
         * is pointless.
         */
        if (!total_swap_pages)
-               return 0;
+               return false;
 
        if (!mem_cgroup_disabled())
                return mem_cgroup_inactive_anon_is_low(lruvec);
@@ -1891,9 +1891,9 @@ static int inactive_anon_is_low(struct lruvec *lruvec)
        return inactive_anon_is_low_global(lruvec_zone(lruvec));
 }
 #else
-static inline int inactive_anon_is_low(struct lruvec *lruvec)
+static inline bool inactive_anon_is_low(struct lruvec *lruvec)
 {
-       return 0;
+       return false;
 }
 #endif
 
@@ -1911,7 +1911,7 @@ static inline int inactive_anon_is_low(struct lruvec *lruvec)
  * This uses a different ratio than the anonymous pages, because
  * the page cache uses a use-once replacement algorithm.
  */
-static int inactive_file_is_low(struct lruvec *lruvec)
+static bool inactive_file_is_low(struct lruvec *lruvec)
 {
        unsigned long inactive;
        unsigned long active;
@@ -1922,7 +1922,7 @@ static int inactive_file_is_low(struct lruvec *lruvec)
        return active > inactive;
 }
 
-static int inactive_list_is_low(struct lruvec *lruvec, enum lru_list lru)
+static bool inactive_list_is_low(struct lruvec *lruvec, enum lru_list lru)
 {
        if (is_file_lru(lru))
                return inactive_file_is_low(lruvec);