8337995: ZUtils::fill uses std::fill_n

Reviewed-by: mli, stefank, jwaters, tschatzl

Author: Kim Barrett

src/hotspot/share/gc/z/zUtils.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,8 +25,6 @@
 #include "gc/z/zUtils.hpp"
 #include "runtime/nonJavaThread.hpp"
 
-#include <algorithm>
-
 const char* ZUtils::thread_name() {
   const Thread* const thread = Thread::current();
   if (thread->is_Named_thread()) {
@@ -38,5 +36,7 @@ const char* ZUtils::thread_name() {
 }
 
 void ZUtils::fill(uintptr_t* addr, size_t count, uintptr_t value) {
-  std::fill_n(addr, count, value);
+  for (size_t i = 0; i < count; ++i) {
+    addr[i] = value;
+  }
 }