[PATCH RESEND 4/4] docs: litmus-tests: Clarify about the RCU pre-initialization test

[Joel Fernandes (Google)]

Since this test returned to tools/memory-model/, make sure that it is
at least referenced from Documentation/litmus-tests/'s README.

Co-developed-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Co-developed-by: Akira Yokosawa <akiyks@xxxxxxxxx>
[Alan: grammar nit]
Suggested-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Signed-off-by: Akira Yokosawa <akiyks@xxxxxxxxx>
---
 Documentation/litmus-tests/README | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/litmus-tests/README b/Documentation/litmus-tests/README
index ac0b270b456c..b79e640214b9 100644
--- a/Documentation/litmus-tests/README
+++ b/Documentation/litmus-tests/README
@@ -24,6 +24,10 @@ Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus
 RCU (/rcu directory)
 --------------------
 
+MP+onceassign+derefonce.litmus (under tools/memory-model/litmus-tests/)
+    Demonstrates the use of rcu_assign_pointer() and rcu_dereference() to
+    ensure that an RCU reader will not see pre-initialization garbage.
+
 RCU+sync+read.litmus
 RCU+sync+free.litmus
     Both the above litmus tests demonstrate the RCU grace period guarantee
-- 
2.17.1