!2551 Avoid spin or livelock during panic

Merge Pull Request from: @ci-robot 
 
PR sync from: Ye Weihua <yeweihua4@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/ZBTCAEJCDIJHW2OCTUBQB2SCKJWROORX/ 
Stephen Brennan (4):
  printk: Add panic_in_progress helper
  printk: disable optimistic spin during panic
  printk: Avoid livelock with heavy printk during panic
  printk: Drop console_sem during panic


-- 
2.34.1
 
https://gitee.com/openeuler/kernel/issues/I89RYC 
 
Link:https://gitee.com/openeuler/kernel/pulls/2551

 

Reviewed-by: Xu Kuohai <xukuohai@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>