The slab allocator is set up much earlier in the boot sequence now so the
allocator must be able to support GFP_KERNEL allocations when interrupts are
not enabled yet.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>