From: Hugh Dickins <hugh@veritas.com>

From: Andrea Arcangeli <andrea@suse.de>

Set VM_RESERVED in videobuf_mmap_mapper, to warn do_no_page and swapout not to
worry about its pages.  Set VM_RESERVED in ia64_elf32_init, it too provides an
unusual nopage which might surprise higher level checks.  Future safety: they
don't actually pose a problem in this current tree.