FIRST
#define REG_IN_CHUNK(FIRST, NEXT, PTR) \
offsetof(struct user_regs_struct, FIRST), \
FIRST, 1);
FIRST, 0);
if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, FIRST))
db->max_ent = FIRST-1;
FIRST(proto); \
(void)BUILD_BUG_ON_ZERO(size != sizeof(*FIRST(args))); \