genetlink: make genl_ops flags a u8 and move to end (3f5ccd06) · Commits · 戴 / test

To save some space in the struct on 32-bit systems, make the flags a u8 (only 4 bits are used) and also move them to the end of the struct. This has no impact on 64-bit systems as alignment of the struct in an array uses up the space anyway. Signed-off-by:

Johannes Berg <johannes.berg@intel.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/net/genetlink.h

+3 −3

Original line number	Diff line number	Diff line
		@@ -112,15 +112,15 @@ static inline void genl_info_net_set(struct genl_info info, struct net net)
		* @ops_list: operations list
		*/
		struct genl_ops {
		u8 cmd;
		u8 internal_flags;
		unsigned int flags;
		const struct nla_policy *policy;
		int (doit)(struct sk_buff skb,
		struct genl_info *info);
		int (dumpit)(struct sk_buff skb,
		struct netlink_callback *cb);
		int (done)(struct netlink_callback cb);
		u8 cmd;
		u8 internal_flags;
		u8 flags;
		};

		int __genl_register_family(struct genl_family *family);

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