xref: /kernel/linux/linux-5.10/tools/memory-model/litmus-tests/LB+poacquireonce+pooncerelease.litmus
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18c2ecf20Sopenharmony_ciC LB+poacquireonce+pooncerelease
28c2ecf20Sopenharmony_ci
38c2ecf20Sopenharmony_ci(*
48c2ecf20Sopenharmony_ci * Result: Never
58c2ecf20Sopenharmony_ci *
68c2ecf20Sopenharmony_ci * Does a release-acquire pair suffice for the load-buffering litmus
78c2ecf20Sopenharmony_ci * test, where each process reads from one of two variables then writes
88c2ecf20Sopenharmony_ci * to the other?
98c2ecf20Sopenharmony_ci *)
108c2ecf20Sopenharmony_ci
118c2ecf20Sopenharmony_ci{}
128c2ecf20Sopenharmony_ci
138c2ecf20Sopenharmony_ciP0(int *x, int *y)
148c2ecf20Sopenharmony_ci{
158c2ecf20Sopenharmony_ci	int r0;
168c2ecf20Sopenharmony_ci
178c2ecf20Sopenharmony_ci	r0 = READ_ONCE(*x);
188c2ecf20Sopenharmony_ci	smp_store_release(y, 1);
198c2ecf20Sopenharmony_ci}
208c2ecf20Sopenharmony_ci
218c2ecf20Sopenharmony_ciP1(int *x, int *y)
228c2ecf20Sopenharmony_ci{
238c2ecf20Sopenharmony_ci	int r0;
248c2ecf20Sopenharmony_ci
258c2ecf20Sopenharmony_ci	r0 = smp_load_acquire(y);
268c2ecf20Sopenharmony_ci	WRITE_ONCE(*x, 1);
278c2ecf20Sopenharmony_ci}
288c2ecf20Sopenharmony_ci
298c2ecf20Sopenharmony_ciexists (0:r0=1 /\ 1:r0=1)
30

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