src/share/vm/runtime/os.cpp

rev 7555 : imported patch 8067469-g1-ignores-alwayspretouch
rev 7556 : [mq]: david-erik-review

@@ -1588,11 +1588,11 @@
   return res;
 }
 
 void os::pretouch_memory(char* start, char* end) {
   for (volatile char *p = start; p < end; p += os::vm_page_size()) {
-    char t = *p; *p = t;
+    *p = 0;
   }
 }
 
 char* os::map_memory(int fd, const char* file_name, size_t file_offset,
                            char *addr, size_t bytes, bool read_only,