2 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 6690e8bae7bb..413284a51ccc 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1287,6 +1287,8 @@ struct block_device_operations {
                                                 unsigned long long);
         int (*revalidate_disk) (struct gendisk *);
         int (*getgeo)(struct block_device *, struct hd_geometry *);
+        /* this callback is with swap_lock and sometimes page table lock held */
+        void (*swap_slot_free_notify) (struct block_device *, unsigned long);
         struct module *owner;
 };
 
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 1f59d9340c4d..ec2b7a42b45f 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -146,6 +146,7 @@ enum {
         SWP_DISCARDING  = (1 << 3),     /* now discarding a free cluster */
         SWP_SOLIDSTATE  = (1 << 4),     /* blkdev seeks are cheap */
         SWP_CONTINUED   = (1 << 5),     /* swap_map has count continuation */
+        SWP_BLKDEV      = (1 << 6),     /* its a block device */
                                         /* add others here before... */
         SWP_SCANNING    = (1 << 8),     /* refcount in scan_swap_map */
 };