The guard here is hopelessly incorrect and inconsistent, and obviously so.

--- a/src/hotspot/os/posix/os_posix.cpp	Fri Jun 28 13:01:37 2024
+++ b/src/hotspot/os/posix/os_posix.cpp	Fri Jun 28 13:41:06 2024
@@ -169,7 +169,7 @@
 
 bool os::first_resident_in_range(address start, size_t size, address& resident_start, size_t& resident_size) {
 
-#ifdef _AIX
+#ifndef LINUX
   resident_start = start;
   resident_size = size;
   return true;