[patch] add alloc_pages/free_pages support

[David Mosberger]

I just resent the hugepage patch with a small change.  The mail
escaped before I had a chance to describe what changed:

 The only change in the followup patch is that the spelling of
 "HugePageSize" is changed to "Hugepagesize" (getsysstats.c).  This is
 so we're in sync with the (forthcoming) kernel.

Thanks,

	--david