From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- .../litmus-tests/R+fencembonceonces.litmus | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 tools/memory-model/litmus-tests/R+fencembonceonces.litmus (limited to 'tools/memory-model/litmus-tests/R+fencembonceonces.litmus') diff --git a/tools/memory-model/litmus-tests/R+fencembonceonces.litmus b/tools/memory-model/litmus-tests/R+fencembonceonces.litmus new file mode 100644 index 000000000..222a0b850 --- /dev/null +++ b/tools/memory-model/litmus-tests/R+fencembonceonces.litmus @@ -0,0 +1,30 @@ +C R+fencembonceonces + +(* + * Result: Never + * + * This is the fully ordered (via smp_mb()) version of one of the classic + * counterintuitive litmus tests that illustrates the effects of store + * propagation delays. Note that weakening either of the barriers would + * cause the resulting test to be allowed. + *) + +{} + +P0(int *x, int *y) +{ + WRITE_ONCE(*x, 1); + smp_mb(); + WRITE_ONCE(*y, 1); +} + +P1(int *x, int *y) +{ + int r0; + + WRITE_ONCE(*y, 2); + smp_mb(); + r0 = READ_ONCE(*x); +} + +exists (y=2 /\ 1:r0=0) -- cgit v1.2.3