Documentation/litmus-tests: Add note on herd7 7.56 in atomic litmus test

herdtools 7.56 has enhanced herd7's C parser so that the "(void)expr" construct in Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus is accepted. This is independent of LKMM's cat model, so mention the required version in the header of the litmus test and its entry in README. CC: Boqun Feng <[email protected]> Reported-by: Andrea Parri <[email protected]> Acked-by: Andrea Parri <[email protected]> Signed-off-by: Akira Yokosawa <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]>
yishaih · Jun 29, 2020 · 5ef0a07 · 5ef0a07
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diff --git a/Documentation/litmus-tests/README b/Documentation/litmus-tests/README
@@ -19,6 +19,7 @@ Atomic-RMW+mb__after_atomic-is-stronger-than-acquire.litmus
 
 Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus
     Test that atomic_set() cannot break the atomicity of atomic RMWs.
+    NOTE: Require herd7 7.56 or later which supports "(void)expr".
 
 
 RCU (/rcu directory)

diff --git a/Documentation/litmus-tests/atomic/Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus b/Documentation/litmus-tests/atomic/Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus
@@ -4,6 +4,7 @@ C Atomic-RMW-ops-are-atomic-WRT-atomic_set
  * Result: Never
  *
  * Test that atomic_set() cannot break the atomicity of atomic RMWs.
+ * NOTE: This requires herd7 7.56 or later which supports "(void)expr".
  *)
 
 {
-Original file line number
+Diff line change
@@ Expand Up / @@ -4,6 +4,7 @@ C Atomic-RMW-ops-are-atomic-WRT-atomic_set @@
      * Result: Never
      *
      * Test that atomic_set() cannot break the atomicity of atomic RMWs.
+     * NOTE: This requires herd7 7.56 or later which supports "(void)expr".
      *)
     {
@@ Expand Down @@