TPACKET_ALIGNMENT   83 include/linux/if_packet.h #define TPACKET_ALIGN(x)	(((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
TPACKET_ALIGNMENT 1818 net/packet/af_packet.c 		if (unlikely(req->tp_frame_size & (TPACKET_ALIGNMENT - 1)))