psb_mmu_alloc_pd
driver->default_pd = psb_mmu_alloc_pd(driver, trap_pagefaults,
extern struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver,
dev_priv->pf_pd = psb_mmu_alloc_pd(dev_priv->mmu, 1, 0);