!871 [sync] PR-866: arm64: kdump: Avoid reserving low memory repeatedly

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/866 
 
PR sync from:  Li Huafei <lihuafei1@huawei.com>
 https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/thread/QXUYQDQ4DEHNVIFCOSKUQF5GRGQKLRPI/ 
 
 
Link:https://gitee.com/openeuler/kernel/pulls/871

 

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