ARC_HDR_DO_ADAPT
arc_hdr_alloc_pabd(hdr, ARC_HDR_DO_ADAPT);
boolean_t do_adapt = ((alloc_flags & ARC_HDR_DO_ADAPT) != 0);
int flags = ARC_HDR_DO_ADAPT;
arc_hdr_alloc_pabd(hdr, ARC_HDR_DO_ADAPT);
arc_hdr_alloc_pabd(hdr, ARC_HDR_DO_ADAPT|ARC_HDR_ALLOC_RDATA);
ARC_HDR_DO_ADAPT|ARC_HDR_ALLOC_RDATA);
arc_hdr_alloc_pabd(hdr, ARC_HDR_DO_ADAPT);
arc_hdr_alloc_pabd(hdr, ARC_HDR_DO_ADAPT);