void key_fsuid_changed(struct task_struct *tsk)
{
	/* update the ownership of the thread keyring */
	BUG_ON(!tsk->cred);
	if (tsk->cred->thread_keyring) {
		down_write(&tsk->cred->thread_keyring->sem);
		tsk->cred->thread_keyring->uid = tsk->cred->fsuid;
		up_write(&tsk->cred->thread_keyring->sem);
	}
}
Unknown