!3103 [sync] PR-3082: fs/dirty_pages: add last read check in seq_read_dirty()

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/3082 
 
PR sync from: Zizhi Wo <wozizhi@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/Z2PGGVKB3BCZJYLGNVYDDEYL64T7UZJQ/ 
 
https://gitee.com/openeuler/kernel/issues/I8JUUC?from=project-issue 
 
Link:https://gitee.com/openeuler/kernel/pulls/3103

 

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