We always keep the struct rcu_head very small, but we may change it in future or under some CONFIGs. There are some other systems may assume the size of struct rcu_head as 2 * sizeof(long). These assumptions obstruct us to add debug information or priority information to struct rcu_head. It is time to fix them. It is glad that I just find 3 places which need to be fixed. These 4 patches are just cleanup patches when the size of struct rcu_head == 2 * sizeof(long). NO overhead added and NO behavior changed. Even when the size of struct rcu_head becomes larger, only slub is changed a little. Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx> --- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>