The preempt debug stuff found a place where we were using
smp_processor_id() without having preemption disabled, in
flush_tlb_pending.  This patch fixes it by using get_cpu_var and
put_cpu_var instead of the __get_cpu_var variant.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>