!4205 [sync] PR-4203: mm/dynamic_hugetlb: skip unexpected migration

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/4203 
 
PR sync from: Liu Shixin <liushixin2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/PDF4XCZV66TNRULFJBVIDIQ42BZRCZTB/ 
 
https://gitee.com/openeuler/kernel/issues/I8YUPE 
 
Link:https://gitee.com/openeuler/kernel/pulls/4205

 

Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>