0001 C S+poonceonces
0002
0003 (*
0004 * Result: Sometimes
0005 *
0006 * Starting with a two-process release-acquire chain ordering P0()'s
0007 * first store against P1()'s final load, if the smp_store_release()
0008 * is replaced by WRITE_ONCE() and the smp_load_acquire() replaced by
0009 * READ_ONCE(), is ordering preserved?
0010 *)
0011
0012 {}
0013
0014 P0(int *x, int *y)
0015 {
0016 WRITE_ONCE(*x, 2);
0017 WRITE_ONCE(*y, 1);
0018 }
0019
0020 P1(int *x, int *y)
0021 {
0022 int r0;
0023
0024 r0 = READ_ONCE(*y);
0025 WRITE_ONCE(*x, 1);
0026 }
0027
0028 exists (x=2 /\ 1:r0=1)
