From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- .../memory-model/litmus-tests/S+poonceonces.litmus | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 tools/memory-model/litmus-tests/S+poonceonces.litmus (limited to 'tools/memory-model/litmus-tests/S+poonceonces.litmus') diff --git a/tools/memory-model/litmus-tests/S+poonceonces.litmus b/tools/memory-model/litmus-tests/S+poonceonces.litmus new file mode 100644 index 000000000..8c9c2f81a --- /dev/null +++ b/tools/memory-model/litmus-tests/S+poonceonces.litmus @@ -0,0 +1,28 @@ +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) -- cgit v1.2.3