The change on 2004-09-03 by ianw@gelato.unsw.edu.au appears to have
a typo, which causes builds of configurations which define both
CONFIG_VIRTUAL_MEM_MAP and CONFIG_DISCONTIGMEM to emit some 890
warnings for redefines of each of pfn_valid, page_to_pfn,
pfn_to_page.

This shows up compiling sn2_defconfig, the SN2 config of arch ia64.  I
believe that this is a simply typo, an extra "#else" line.  Removing
this exta line enables sn2_defconfig to build as before.

Acked by Jesse Barnes <jbarnes@engr.sgi.com>
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>