Convert i386 ioremap pagetable walkers to loops using p?d_addr_end.
Rename internal levels ioremap_p??_range.  Don't cheat, give it a real
(but inlined) ioremap_pud_range; uninline lowest level to help debug.
Replace "page already exists" printk and BUG by BUG_ON.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>