!4764 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/3MRGQHW2R2LA46ZH6DMHUTX2CCUXKARV/ 
 
https://gitee.com/src-openeuler/kernel/issues/I93X0G 
 
Link:https://gitee.com/openeuler/kernel/pulls/4764

 

Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>