From 8f2ddaac302a8ca364cb04efb19cd3b5cd058910 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sat, 21 Mar 2015 14:14:03 +1100 Subject: [PATCH] netlink: Remove netlink_compare_arg.trailer Instead of computing the offset from trailer, this patch computes netlink_compare_arg_len from the offset of portid and then adds 4 to it. This allows trailer to be removed. Reported-by: David Miller Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/netlink/af_netlink.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 72c6b55af741..651792141f07 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -974,10 +974,11 @@ struct netlink_compare_arg { possible_net_t pnet; u32 portid; - char trailer[]; }; -#define netlink_compare_arg_len offsetof(struct netlink_compare_arg, trailer) +/* Doing sizeof directly may yield 4 extra bytes on 64-bit. */ +#define netlink_compare_arg_len \ + (offsetof(struct netlink_compare_arg, portid) + sizeof(u32)) static inline int netlink_compare(struct rhashtable_compare_arg *arg, const void *ptr) -- 2.39.5