tag	line	file	source code
ETH_HLEN	112	drivers/net/loopback.c	dev->hard_header_len  = ETH_HLEN;    /* 14      */
ETH_HLEN	154	drivers/net/net_init.c	dev->hard_header_len = ETH_HLEN;
ETH_HLEN	220	drivers/net/plip.c	dev->hard_header_len = ETH_HLEN;