2 files changed, 11 insertions, 1 deletions
diff --git a/testsuite/systemtap.base/cast.exp b/testsuite/systemtap.base/cast.exp
index 374132f0..38ef67b9 100644
--- a/testsuite/systemtap.base/cast.exp
+++ b/testsuite/systemtap.base/cast.exp
@@ -2,5 +2,6 @@ set test "cast"
 set ::result_string {PID OK
 PID2 OK
 execname OK
-sa_data OK}
+sa_data OK
+usage OK}
 stap_run2 $srcdir/$subdir/$test.stp -g
diff --git a/testsuite/systemtap.base/cast.stp b/testsuite/systemtap.base/cast.stp
index e2505000..bb889bb8 100644
--- a/testsuite/systemtap.base/cast.stp
+++ b/testsuite/systemtap.base/cast.stp
@@ -33,6 +33,15 @@ probe begin
     else
         printf("sa_data %d != %d\n", data, cast_data)
 
+    // Compare usage counter values through a struct address
+    usage = @cast(curr, "task_struct")->usage->counter
+    pusage = & @cast(curr, "task_struct")->usage
+    cast_usage = @cast(pusage, "atomic_t")->counter
+    if (usage == cast_usage)
+        println("usage OK")
+    else
+        printf("usage %d != %d\n", usage, cast_usage)
+
     exit()
 }