1 files changed, 3 insertions, 1 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 09c9a8d26ee9..fd252fff4c66 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -938,7 +938,9 @@ again:
                           GFP_NOFS);
 
         if (i_done != num_pages) {
-                atomic_inc(&BTRFS_I(inode)->outstanding_extents);
+                spin_lock(&BTRFS_I(inode)->lock);
+                BTRFS_I(inode)->outstanding_extents++;
+                spin_unlock(&BTRFS_I(inode)->lock);
                 btrfs_delalloc_release_space(inode,
                                      (num_pages - i_done) << PAGE_CACHE_SHIFT);
         }