mm/vmscan.c: remove 7th argument of isolate_lru_pages()

We may simply check for sc->may_unmap in isolate_lru_pages() instead of
doing that in both of its callers.

Link: http://lkml.kernel.org/r/154748280735.29962.15867846875217618569.stgit@localhost.localdomain
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 6319536..a1c2f78 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1653,7 +1653,7 @@ static __always_inline void update_lru_sizes(struct lruvec *lruvec,
 static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
                struct lruvec *lruvec, struct list_head *dst,
                unsigned long *nr_scanned, struct scan_control *sc,
-               isolate_mode_t mode, enum lru_list lru)
+               enum lru_list lru)
 {
        struct list_head *src = &lruvec->lists[lru];
        unsigned long nr_taken = 0;
@@ -1662,6 +1662,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
        unsigned long skipped = 0;
        unsigned long scan, total_scan, nr_pages;
        LIST_HEAD(pages_skipped);
+       isolate_mode_t mode = (sc->may_unmap ? 0 : ISOLATE_UNMAPPED);
 
        scan = 0;
        for (total_scan = 0;
@@ -1900,7 +1901,6 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
        unsigned long nr_reclaimed = 0;
        unsigned long nr_taken;
        struct reclaim_stat stat = {};
-       isolate_mode_t isolate_mode = 0;
        int file = is_file_lru(lru);
        struct pglist_data *pgdat = lruvec_pgdat(lruvec);
        struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
@@ -1921,13 +1921,10 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
 
        lru_add_drain();
 
-       if (!sc->may_unmap)
-               isolate_mode |= ISOLATE_UNMAPPED;
-
        spin_lock_irq(&pgdat->lru_lock);
 
        nr_taken = isolate_lru_pages(nr_to_scan, lruvec, &page_list,
-                                    &nr_scanned, sc, isolate_mode, lru);
+                                    &nr_scanned, sc, lru);
 
        __mod_node_page_state(pgdat, NR_ISOLATED_ANON + file, nr_taken);
        reclaim_stat->recent_scanned[file] += nr_taken;
@@ -2084,19 +2081,15 @@ static void shrink_active_list(unsigned long nr_to_scan,
        struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;
        unsigned nr_deactivate, nr_activate;
        unsigned nr_rotated = 0;
-       isolate_mode_t isolate_mode = 0;
        int file = is_file_lru(lru);
        struct pglist_data *pgdat = lruvec_pgdat(lruvec);
 
        lru_add_drain();
 
-       if (!sc->may_unmap)
-               isolate_mode |= ISOLATE_UNMAPPED;
-
        spin_lock_irq(&pgdat->lru_lock);
 
        nr_taken = isolate_lru_pages(nr_to_scan, lruvec, &l_hold,
-                                    &nr_scanned, sc, isolate_mode, lru);
+                                    &nr_scanned, sc, lru);
 
        __mod_node_page_state(pgdat, NR_ISOLATED_ANON + file, nr_taken);
        reclaim_stat->recent_scanned[file] += nr_taken;