__inode_security_revalidate() never gets NULL opt_dentry

 * Try reloading inode security labels that have been marked as invalid.  The

 * @may_sleep parameter indicates when sleeping and thus reloading labels is

 * allowed; when set to false, returns -ECHILD when the label is

 * invalid.  The @opt_dentry parameter should be set to a dentry of the inode;

 * when no dentry is available, set it to NULL instead.

 * invalid.  The @dentry parameter should be set to a dentry of the inode.

 */

static int __inode_security_revalidate(struct inode *inode,

				       struct dentry *opt_dentry,

				       struct dentry *dentry,

				       bool may_sleep)

{

	struct inode_security_struct *isec = inode->i_security;

		 * @opt_dentry is NULL and no dentry for this inode can be

		 * found; in that case, continue using the old label.

		 */

		inode_doinit_with_dentry(inode, opt_dentry);

		inode_doinit_with_dentry(inode, dentry);

	}

	return 0;

}