While looking for a place to add a new bitfield in ipv6_pinfo, I've found a 32 bit hole (in 64 bit mode) at the beginning of the struct. Since dst_cookie is used in the output fastpath, I've moved this field to fill the hole, thus decreasing the struct size on 64 bit platforms by 4 bytes. On 32 bit platforms the struct size doesn't change. Signed-off-by: Balazs Scheidler <bazsi@balabit.hu> --- include/linux/ipv6.h | 3 +-- 1 files changed, 1 insertions(+), 2 deletions(-) diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index c662efa..52dcbf7 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -285,6 +285,7 @@ struct ipv6_pinfo { struct in6_addr saddr; struct in6_addr rcv_saddr; struct in6_addr daddr; + __u32 dst_cookie; struct in6_pktinfo sticky_pktinfo; struct in6_addr *daddr_cache; #ifdef CONFIG_IPV6_SUBTREES @@ -348,8 +349,6 @@ struct ipv6_pinfo { */ __u8 tclass; - __u32 dst_cookie; - struct ipv6_mc_socklist *ipv6_mc_list; struct ipv6_ac_socklist *ipv6_ac_list; struct ipv6_fl_socklist *ipv6_fl_list; -- 1.6.0.4