tlb_lock
pcpu->pc_booke.tlb_lock = ptr;
"tlb_lock=%p", __func__, pc->pc_cpuid, pc->pc_booke.tlb_lock);
tlb_lock(pc->pc_booke.tlb_lock);
tlb_unlock(pc->pc_booke.tlb_lock);
uintptr_t *tlb_lock; \
void tlb_lock(uintptr_t *);
ASSYM(PC_BOOKE_TLB_LOCK, offsetof(struct pcpu, pc_booke.tlb_lock));