28 lines
356 B
Plaintext
28 lines
356 B
Plaintext
|
C S+fencewmbonceonce+poacquireonce
|
||
|
|
|
||
|
|
(*
|
||
|
|
* Result: Never
|
||
|
|
*
|
||
|
|
* Can a smp_wmb(), instead of a release, and an acquire order a prior
|
||
|
|
* store against a subsequent store?
|
||
|
|
*)
|
||
|
|
|
||
|
|
{}
|
||
|
|
|
||
|
|
P0(int *x, int *y)
|
||
|
|
{
|
||
|
|
WRITE_ONCE(*x, 2);
|
||
|
|
smp_wmb();
|
||
|
|
WRITE_ONCE(*y, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
P1(int *x, int *y)
|
||
|
|
{
|
||
|
|
int r0;
|
||
|
|
|
||
|
|
r0 = smp_load_acquire(y);
|
||
|
|
WRITE_ONCE(*x, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
exists (x=2 /\ 1:r0=1)
|