Typo in the exported jvm.h in the jdk workspace found while working on 7174218.
The fix is simple (below), and sync up with the changes in 7174218:

diff -r 7def50698e78 src/share/javavm/export/jvm.h
--- a/src/share/javavm/export/jvm.h Thu May 24 16:15:58 2012 -0700
+++ b/src/share/javavm/export/jvm.h Wed Jun 06 01:15:50 2012 +0800
@@ -595,7 +595,7 @@
 JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused);

 /*
- * java.util.concurrent.AtomicLong
+ * java.util.concurrent.atomic.AtomicLong
  */
 JNIEXPORT jboolean JNICALL
 JVM_SupportsCX8(void);

see discussion on the core-libs-dev mailing list:
  http://mail.openjdk.java.net/pipermail/core-libs-dev/2012-June/010456.html