To explain some code, this patch adds some comments, and modifies or
merges some comments to make them more neat.
Signed-off-by: NGuojia Liao <liaoguojia@huawei.com>
Signed-off-by: NZhongzhu Liu <liuzhongzhu@huawei.com>
Signed-off-by: NWeihang Li <liweihang@hisilicon.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>