uvm_vslock
error = uvm_vslock(p->p_vmspace, __UNCONST(uaddr), len, VM_PROT_READ);
error = uvm_vslock(p->p_vmspace, uaddr, len, VM_PROT_WRITE);
if (__predict_false(uvm_vslock(p->p_vmspace, vaddr, buflen,
error = uvm_vslock(p->p_vmspace, bp->b_data, todo,
error = uvm_vslock(l->l_proc->p_vmspace, uva, sizeof(*uaddr),
error = uvm_vslock(l->l_proc->p_vmspace, uva, sizeof(*uaddr),
error = uvm_vslock(vs, (void *)uva, len, prot);
int uvm_vslock(struct vmspace *, void *, size_t, vm_prot_t);