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b6ff30849c
This commit adds comments that label the MP tests' producer and consumer processes, and also that label the "exists" clause as the bad outcome. Reported-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
31 lines
486 B
Text
31 lines
486 B
Text
C MP+pooncerelease+poacquireonce
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(*
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* Result: Never
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*
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* This litmus test demonstrates that smp_store_release() and
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* smp_load_acquire() provide sufficient ordering for the message-passing
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* pattern.
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*)
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{
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int buf;
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int flag;
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}
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P0(int *buf, int *flag) // Producer
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{
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WRITE_ONCE(*buf, 1);
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smp_store_release(flag, 1);
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}
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P1(int *buf, int *flag) // Consumer
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{
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int r0;
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int r1;
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r0 = smp_load_acquire(flag);
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r1 = READ_ONCE(*buf);
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}
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exists (1:r0=1 /\ 1:r1=0) (* Bad outcome. *)
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