diff --git a/fs/sdcardfs/inode.c b/fs/sdcardfs/inode.c
index a3f7c8edb9d5..70a4e3cb8781 100644
--- a/fs/sdcardfs/inode.c
+++ b/fs/sdcardfs/inode.c
@@ -776,13 +776,9 @@ static int sdcardfs_setattr(struct vfsmount *mnt, struct dentry *dentry, struct
 	 * afterwards in the other cases: we fsstack_copy_inode_size from
 	 * the lower level.
 	 */
-	if (current->mm)
-		down_write(&current->mm->mmap_sem);
 	if (ia->ia_valid & ATTR_SIZE) {
 		err = inode_newsize_ok(&tmp, ia->ia_size);
 		if (err) {
-			if (current->mm)
-				up_write(&current->mm->mmap_sem);
 			goto out;
 		}
 		truncate_setsize(inode, ia->ia_size);
@@ -805,8 +801,6 @@ static int sdcardfs_setattr(struct vfsmount *mnt, struct dentry *dentry, struct
 	err = notify_change2(lower_mnt, lower_dentry, &lower_ia, /* note: lower_ia */
 			NULL);
 	inode_unlock(d_inode(lower_dentry));
-	if (current->mm)
-		up_write(&current->mm->mmap_sem);
 	if (err)
 		goto out;