linux/tools/memory-model/litmus-tests/S+poonceonces.litmus
Akira Yokosawa 5c587f9b9c tools/memory-model: Remove redundant initialization in litmus tests
This is a revert of commit 1947bfcf81 ("tools/memory-model: Add types
to litmus tests") with conflict resolutions.

klitmus7 [1] is aware of default types of "int" and "int*".
It accepts litmus tests for herd7 without extra type info unless
non-"int" variables are referenced by an "exists", "locations",
or "filter" directive.

[1]: Tested with klitmus7 versions 7.49 or later.

Suggested-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2021-01-04 14:40:49 -08:00

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C S+poonceonces
(*
* Result: Sometimes
*
* Starting with a two-process release-acquire chain ordering P0()'s
* first store against P1()'s final load, if the smp_store_release()
* is replaced by WRITE_ONCE() and the smp_load_acquire() replaced by
* READ_ONCE(), is ordering preserved?
*)
{}
P0(int *x, int *y)
{
WRITE_ONCE(*x, 2);
WRITE_ONCE(*y, 1);
}
P1(int *x, int *y)
{
int r0;
r0 = READ_ONCE(*y);
WRITE_ONCE(*x, 1);
}
exists (x=2 /\ 1:r0=1)