Function umtx_thread_exit

freebsd/kern/kern_umtx.c:4556–4561

* thread exit hook. */

 * thread exit hook.
 */
void
umtx_thread_exit(struct thread *td)
{

	umtx_thread_cleanup(td);
}

static int
umtx_read_uptr(struct thread *td, uintptr_t ptr, uintptr_t *res, bool compat32)