1 files changed, 46 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/hurd/munlock.c b/REORG.TODO/sysdeps/mach/hurd/munlock.c
new file mode 100644
index 0000000000..ee8235ecf0
--- /dev/null
+++ b/REORG.TODO/sysdeps/mach/hurd/munlock.c
@@ -0,0 +1,46 @@
+/* munlock -- undo the effects of prior mlock calls.  Mach/Hurd version.
+   Copyright (C) 2001-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <hurd.h>
+#include <mach/mach_host.h>
+
+/* Undo the effects on these whole pages of any prior mlock calls.  */
+
+int
+munlock (const void *addr, size_t len)
+{
+  mach_port_t host;
+  vm_address_t page;
+  error_t err;
+
+  err = __get_privileged_ports (&host, NULL);
+  if (err)
+    host = __mach_host_self();
+
+  page = trunc_page ((vm_address_t) addr);
+  len = round_page ((vm_address_t) addr + len) - page;
+
+  err = __vm_wire (host, __mach_task_self (), page, len, VM_PROT_NONE);
+  if (host != __mach_host_self())
+    __mach_port_deallocate (__mach_task_self (), host);
+
+  return err ? __hurd_fail (err) : 0;
+}