3 files changed, 10 insertions, 5 deletions

diff --git a/tools/memory-model/litmus-tests/IRIW+mbonceonces+OnceOnce.litmus b/tools/memory-model/litmus-tests/IRIW+mbonceonces+OnceOnce.litmus
index 50d5db9ea983..98a3716efa37 100644
--- a/tools/memory-model/litmus-tests/IRIW+mbonceonces+OnceOnce.litmus
+++ b/tools/memory-model/litmus-tests/IRIW+mbonceonces+OnceOnce.litmus
@@ -7,7 +7,7 @@ C IRIW+mbonceonces+OnceOnce
  * between each pairs of reads.  In other words, is smp_mb() sufficient to
  * cause two different reading processes to agree on the order of a pair
  * of writes, where each write is to a different variable by a different
- * process?
+ * process?  This litmus test exercises LKMM's "propagation" rule.
  *)
 
 {}
diff --git a/tools/memory-model/litmus-tests/README b/tools/memory-model/litmus-tests/README
index 6919909bbd0f..17eb9a8c222d 100644
--- a/tools/memory-model/litmus-tests/README
+++ b/tools/memory-model/litmus-tests/README
@@ -23,7 +23,8 @@ IRIW+mbonceonces+OnceOnce.litmus
         between each pairs of reads.  In other words, is smp_mb()
         sufficient to cause two different reading processes to agree on
         the order of a pair of writes, where each write is to a different
-        variable by a different process?
+        variable by a different process?  This litmus test is forbidden
+        by LKMM's propagation rule.
 
 IRIW+poonceonces+OnceOnce.litmus
         Test of independent reads from independent writes with nothing
@@ -119,8 +120,10 @@ S+wmbonceonce+poacquireonce.litmus
 
 WRC+poonceonces+Once.litmus
 WRC+pooncerelease+rmbonceonce+Once.litmus
-        These two are members of an extension of the MP litmus-test class
-        in which the first write is moved to a separate process.
+        These two are members of an extension of the MP litmus-test
+        class in which the first write is moved to a separate process.
+        The second is forbidden because smp_store_release() is
+        A-cumulative in LKMM.
 
 Z6.0+pooncelock+pooncelock+pombonce.litmus
         Is the ordering provided by a spin_unlock() and a subsequent
diff --git a/tools/memory-model/litmus-tests/WRC+pooncerelease+rmbonceonce+Once.litmus b/tools/memory-model/litmus-tests/WRC+pooncerelease+rmbonceonce+Once.litmus
index 97fcbffde9a0..ad3448b941e6 100644
--- a/tools/memory-model/litmus-tests/WRC+pooncerelease+rmbonceonce+Once.litmus
+++ b/tools/memory-model/litmus-tests/WRC+pooncerelease+rmbonceonce+Once.litmus
@@ -5,7 +5,9 @@ C WRC+pooncerelease+rmbonceonce+Once
  *
  * This litmus test is an extension of the message-passing pattern, where
  * the first write is moved to a separate process.  Because it features
- * a release and a read memory barrier, it should be forbidden.
+ * a release and a read memory barrier, it should be forbidden.  More
+ * specifically, this litmus test is forbidden because smp_store_release()
+ * is A-cumulative in LKMM.
  *)
 
 {}