Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

[deliverable/linux.git] / mm / huge_memory.c

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 963e14c0486f1b14596f97dc8af8294bf1aea4e3..d66010e0049d1b982c702881769a18b73fcff10e 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -211,24 +211,29 @@ static void put_huge_zero_page(void)
        BUG_ON(atomic_dec_and_test(&huge_zero_refcount));
 }
 
-static int shrink_huge_zero_page(struct shrinker *shrink,
-               struct shrink_control *sc)
+static unsigned long shrink_huge_zero_page_count(struct shrinker *shrink,
+                                       struct shrink_control *sc)
 {
-       if (!sc->nr_to_scan)
-               /* we can free zero page only if last reference remains */
-               return atomic_read(&huge_zero_refcount) == 1 ? HPAGE_PMD_NR : 0;
+       /* we can free zero page only if last reference remains */
+       return atomic_read(&huge_zero_refcount) == 1 ? HPAGE_PMD_NR : 0;
+}
 
+static unsigned long shrink_huge_zero_page_scan(struct shrinker *shrink,
+                                      struct shrink_control *sc)
+{
        if (atomic_cmpxchg(&huge_zero_refcount, 1, 0) == 1) {
                struct page *zero_page = xchg(&huge_zero_page, NULL);
                BUG_ON(zero_page == NULL);
                __free_page(zero_page);
+               return HPAGE_PMD_NR;
        }
 
        return 0;
 }
 
 static struct shrinker huge_zero_page_shrinker = {
-       .shrink = shrink_huge_zero_page,
+       .count_objects = shrink_huge_zero_page_count,
+       .scan_objects = shrink_huge_zero_page_scan,
        .seeks = DEFAULT_SEEKS,
 };