Unverified Commit 8c1e8e1f authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!5979 mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again 

Merge Pull Request from: @ci-robot 
 
PR sync from: Ze Zuo <zuoze1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/2YX5CCHHBAU3ZUHLGGQXPROZDKMPPDBH/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9E2EC 
 
Link:https://gitee.com/openeuler/kernel/pulls/5979

 

Reviewed-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents a09418ff d586b4a2

mm/page-writeback.c

+1 −1
Original line number Diff line number Diff line
@@ -1519,7 +1519,7 @@ static inline void wb_dirty_limits(struct dirty_throttle_control *dtc) 
	 */

	dtc->wb_thresh = __wb_calc_thresh(dtc);

	dtc->wb_bg_thresh = dtc->thresh ?

		div_u64((u64)dtc->wb_thresh * dtc->bg_thresh, dtc->thresh) : 0;

		div64_u64(dtc->wb_thresh * dtc->bg_thresh, dtc->thresh) : 0;



	/*

	 * In order to avoid the stacked BDI deadlock we need