1 files changed, 2 insertions, 2 deletions

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index a6b2aa14626e..ac35ec58db55 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -37,9 +37,9 @@ static int ext4_release_file (struct inode * inode, struct file * filp)
         if ((filp->f_mode & FMODE_WRITE) &&
                         (atomic_read(&inode->i_writecount) == 1))
         {
-                mutex_lock(&EXT4_I(inode)->truncate_mutex);
+                down_write(&EXT4_I(inode)->i_data_sem);
                 ext4_discard_reservation(inode);
-                mutex_unlock(&EXT4_I(inode)->truncate_mutex);
+                up_write(&EXT4_I(inode)->i_data_sem);
         }
         if (is_dx(inode) && filp->private_data)
                 ext4_htree_free_dir_info(filp->private_data);