Symbol: p4d_deref
arch/s390/include/asm/pgtable.h
1432
return (pud_t *) p4d_deref(p4d) + pud_index(address);
arch/s390/mm/vmem.c
381
vmem_free_pages(p4d_deref(*p4d), CRST_ALLOC_ORDER, NULL);