1 files changed, 7 insertions, 7 deletions

diff --git a/mm/migrate.c b/mm/migrate.c
index 181f5d2718a9..ac6f4939bb59 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -100,7 +100,7 @@ int isolate_movable_page(struct page *page, isolate_mode_t mode)
         /*
          * Check PageMovable before holding a PG_lock because page's owner
          * assumes anybody doesn't touch PG_lock of newly allocated page
-         * so unconditionally grapping the lock ruins page's owner side.
+         * so unconditionally grabbing the lock ruins page's owner side.
          */
         if (unlikely(!__PageMovable(page)))
                 goto out_putpage;
@@ -374,7 +374,7 @@ unlock:
 }
 #endif
 
-static int expected_page_refs(struct page *page)
+static int expected_page_refs(struct address_space *mapping, struct page *page)
 {
         int expected_count = 1;
 
@@ -384,7 +384,7 @@ static int expected_page_refs(struct page *page)
          */
         expected_count += is_device_private_page(page);
         expected_count += is_device_public_page(page);
-        if (page_mapping(page))
+        if (mapping)
                 expected_count += hpage_nr_pages(page) + page_has_private(page);
 
         return expected_count;
@@ -405,7 +405,7 @@ int migrate_page_move_mapping(struct address_space *mapping,
         XA_STATE(xas, &mapping->i_pages, page_index(page));
         struct zone *oldzone, *newzone;
         int dirty;
-        int expected_count = expected_page_refs(page) + extra_count;
+        int expected_count = expected_page_refs(mapping, page) + extra_count;
 
         if (!mapping) {
                 /* Anonymous page without mapping */
@@ -750,7 +750,7 @@ static int __buffer_migrate_page(struct address_space *mapping,
                 return migrate_page(mapping, newpage, page, mode);
 
         /* Check whether page does not have extra refs before we do more work */
-        expected_count = expected_page_refs(page);
+        expected_count = expected_page_refs(mapping, page);
         if (page_count(page) != expected_count)
                 return -EAGAIN;
 
@@ -911,7 +911,7 @@ static int fallback_migrate_page(struct address_space *mapping,
          */
         if (page_has_private(page) &&
             !try_to_release_page(page, GFP_KERNEL))
-                return -EAGAIN;
+                return mode == MIGRATE_SYNC ? -EAGAIN : -EBUSY;
 
         return migrate_page(mapping, newpage, page, mode);
 }
@@ -1287,7 +1287,7 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
         struct anon_vma *anon_vma = NULL;
 
         /*
-         * Movability of hugepages depends on architectures and hugepage size.
+         * Migratability of hugepages depends on architectures and their size.
          * This check is necessary because some callers of hugepage migration
          * like soft offline and memory hotremove don't walk through page
          * tables or check whether the hugepage is pmd-based or not before