1 files changed, 3 insertions, 1 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 0fa7cf227f1a..a8ae68c6fbb8 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -306,6 +306,7 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
         u64 physical;
         u64 length = 0;
         u64 map_length;
+        int total_devs;
         struct bio_vec *bvec;
         int i;
         int ret;
@@ -315,7 +316,8 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
         }
         map_tree = &root->fs_info->mapping_tree;
         map_length = length;
-        ret = btrfs_map_block(map_tree, logical, &physical, &map_length, &dev);
+        ret = btrfs_map_block(map_tree, READ, 0, logical, &physical,
+                              &map_length, &dev, &total_devs);
         if (map_length < length + size) {
                 return 1;
         }