!4758 binder: signal epoll threads of self-work

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/K7U4OQC6F7HFS2I3W6WFBF2DPNVFPSNO/ 
 
https://gitee.com/src-openeuler/kernel/issues/I93X0G 
 
Link:https://gitee.com/openeuler/kernel/pulls/4758

 

Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>