From 55d297fdda70ad0b9b0378890a05cfc2a040c92c Mon Sep 17 00:00:00 2001
From: Calvin Cheung <ccheung@openjdk.org>
Date: Fri, 26 May 2023 18:04:01 +0000
Subject: [PATCH] 8308594: Use atomic bitset function for
 PackageEntry::_defined_by_cds_in_class_path

Reviewed-by: coleenp, lfoltan
---
 src/hotspot/share/classfile/packageEntry.hpp | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/src/hotspot/share/classfile/packageEntry.hpp b/src/hotspot/share/classfile/packageEntry.hpp
index 6fefd208ad639..213f115b2d08f 100644
--- a/src/hotspot/share/classfile/packageEntry.hpp
+++ b/src/hotspot/share/classfile/packageEntry.hpp
@@ -225,12 +225,7 @@ class PackageEntry : public CHeapObj<mtModule> {
   }
   void set_defined_by_cds_in_class_path(int idx) {
     assert(idx < max_index_for_defined_in_class_path(), "sanity");
-    int old_val = 0;
-    int new_val = 0;
-    do {
-      old_val = Atomic::load(&_defined_by_cds_in_class_path);
-      new_val = old_val | ((int)1 << idx);
-    } while (Atomic::cmpxchg(&_defined_by_cds_in_class_path, old_val, new_val) != old_val);
+    Atomic::fetch_then_or(&_defined_by_cds_in_class_path, ((int)1 << idx));
   }
 };