VLAN_GRP_HASH_SHIFT   63 net/8021q/vlan.c 	return ((idx >> VLAN_GRP_HASH_SHIFT) ^ idx) & VLAN_GRP_HASH_MASK;
VLAN_GRP_HASH_SHIFT   56 net/8021q/vlan.h #define VLAN_GRP_HASH_SIZE	(1 << VLAN_GRP_HASH_SHIFT)