[PATCH] migration: make sure there is no attempt to migrate reserved pages.

This ensures that reserved pages are not migrated.  Reserved pages
currently cause the WARN_ON to trigger in migrate_page_add()

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>