diff -r 0a9f5cbe37d9 -r 129751018061 src/share/classes/com/sun/tools/doclint/Checker.java
--- a/src/share/classes/com/sun/tools/doclint/Checker.java	Fri Jul 19 07:22:53 2013 -0700
+++ b/src/share/classes/com/sun/tools/doclint/Checker.java	Tue Jul 23 16:06:11 2013 -0700
@@ -141,10 +141,27 @@
 
         boolean isOverridingMethod = !env.currOverriddenMethods.isEmpty();
 
-        if (tree == null) {
-            if (!isSynthetic() && !isOverridingMethod)
-                reportMissing("dc.missing.comment");
-            return null;
+        if (p.getLeaf() == p.getCompilationUnit()) {
+            // If p points to a compilation unit, the implied declaration is the
+            // package declaration (if any) for the compilation unit.
+            // Handle this case specially, because doc comments are only
+            // expected in package-info files.
+            JavaFileObject fo = p.getCompilationUnit().getSourceFile();
+            boolean isPkgInfo = fo.isNameCompatible("package-info", JavaFileObject.Kind.SOURCE);
+            if (tree == null) {
+                if (isPkgInfo)
+                    reportMissing("dc.missing.comment");
+                return null;
+            } else {
+                if (!isPkgInfo)
+                    reportReference("dc.unexpected.comment");
+            }
+        } else {
+            if (tree == null) {
+                if (!isSynthetic() && !isOverridingMethod)
+                    reportMissing("dc.missing.comment");
+                return null;
+            }
         }
 
         tagStack.clear();
@@ -187,6 +204,10 @@
         env.messages.report(MISSING, Kind.WARNING, env.currPath.getLeaf(), code, args);
     }
 
+    private void reportReference(String code, Object... args) {
+        env.messages.report(REFERENCE, Kind.WARNING, env.currPath.getLeaf(), code, args);
+    }
+
     @Override
     public Void visitDocComment(DocCommentTree tree, Void ignore) {
         super.visitDocComment(tree, ignore);