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+[[!meta copyright="Copyright © 2012 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+Used in [[glibc]] for implementing [[glibc/mmap]], brk and sbrk, and *attempt
+to map page zero redzoned* (`[glibc]/hurd/hurdstartup.c:_hurd_startup`).
+
+[[!tag open_issue_glibc open_issue_gnumach]]It has an awkward mention in
+`[glibc]/sysdeps/mach/hurd/dl-sysdep.c:fmh`: *XXX loser kludge for vm\_map
+kernel bug*.