!10825 Revert "mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again"

Merge Pull Request from: @ci-robot 
 
PR sync from: Kaixiong Yu <yukaixiong@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/UYHZH7DSC267RSTMQ3WAHWJ6PZBXJZW2/ 
 
https://gitee.com/src-openeuler/kernel/issues/IAH01A 
 
Link:https://gitee.com/openeuler/kernel/pulls/10825

 

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