!3420 md: protect md_thread with rcu

Merge Pull Request from: @ci-robot 
 
PR sync from: Li Lingfeng <lilingfeng3@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/LIV6O4BF2E6AH6CZN7GIEXGTSZMTUWFO/ 
Protect md_thread with rcu

v1->v2:
  Add missing issue.

Yu Kuai (5):
  md: factor out a helper to wake up md_thread directly
  dm-raid: remove useless checking in raid_message()
  md/bitmap: always wake up md_thread in timeout_store
  md/bitmap: factor out a helper to set timeout
  md: protect md_thread with rcu


-- 
2.31.1
 
https://gitee.com/openeuler/kernel/issues/I8OPEK 
 
Link:https://gitee.com/openeuler/kernel/pulls/3420

 

Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>