pmap_testbit
#define pmap_is_modified(pg) pmap_testbit(pg, PTE_PROT(TLB_DIRTY))
#define pmap_is_referenced(pg) pmap_testbit(pg, PTE_PROT(TLB_REFTRAP))
bool pmap_testbit(struct vm_page *, u_int);
return pmap_testbit(pg, PTE_U);
return pmap_testbit(pg, PTE_M);
return pmap_testbit(pa, PG_U);
return pmap_testbit(pa, PG_M);
bool pmap_testbit(paddr_t, int);