xref: /kernel/linux/linux-5.10/tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus
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18c2ecf20Sopenharmony_ciC MP+pooncerelease+poacquireonce
28c2ecf20Sopenharmony_ci
38c2ecf20Sopenharmony_ci(*
48c2ecf20Sopenharmony_ci * Result: Never
58c2ecf20Sopenharmony_ci *
68c2ecf20Sopenharmony_ci * This litmus test demonstrates that smp_store_release() and
78c2ecf20Sopenharmony_ci * smp_load_acquire() provide sufficient ordering for the message-passing
88c2ecf20Sopenharmony_ci * pattern.
98c2ecf20Sopenharmony_ci *)
108c2ecf20Sopenharmony_ci
118c2ecf20Sopenharmony_ci{}
128c2ecf20Sopenharmony_ci
138c2ecf20Sopenharmony_ciP0(int *x, int *y)
148c2ecf20Sopenharmony_ci{
158c2ecf20Sopenharmony_ci	WRITE_ONCE(*x, 1);
168c2ecf20Sopenharmony_ci	smp_store_release(y, 1);
178c2ecf20Sopenharmony_ci}
188c2ecf20Sopenharmony_ci
198c2ecf20Sopenharmony_ciP1(int *x, int *y)
208c2ecf20Sopenharmony_ci{
218c2ecf20Sopenharmony_ci	int r0;
228c2ecf20Sopenharmony_ci	int r1;
238c2ecf20Sopenharmony_ci
248c2ecf20Sopenharmony_ci	r0 = smp_load_acquire(y);
258c2ecf20Sopenharmony_ci	r1 = READ_ONCE(*x);
268c2ecf20Sopenharmony_ci}
278c2ecf20Sopenharmony_ci
288c2ecf20Sopenharmony_ciexists (1:r0=1 /\ 1:r1=0)
29

Indexes created Thu Nov 07 10:32:03 CST 2024