From: Herbert Xu Date: Sat, 21 Mar 2015 03:14:03 +0000 (+1100) Subject: netlink: Remove netlink_compare_arg.trailer X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8f2ddaac302a8ca364cb04efb19cd3b5cd058910;p=linux-beck.git 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 --- 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)