1C MP+pooncerelease+poacquireonce
 2
 3(*
 4 * Result: Never
 5 *
 6 * This litmus test demonstrates that smp_store_release() and
 7 * smp_load_acquire() provide sufficient ordering for the message-passing
 8 * pattern.
 9 *)
10
11{}
12
13P0(int *buf, int *flag) // Producer
14{
15	WRITE_ONCE(*buf, 1);
16	smp_store_release(flag, 1);
17}
18
19P1(int *buf, int *flag) // Consumer
20{
21	int r0;
22	int r1;
23
24	r0 = smp_load_acquire(flag);
25	r1 = READ_ONCE(*buf);
26}
27
28exists (1:r0=1 /\ 1:r1=0) (* Bad outcome. *)