linux-kernel - [PATCH] sched/deadline: simplify SCHED_WARN

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:   Mon, 18 Oct 2021 19:45:54 +0800
From:   Hui Su <suhui_kernel@....com>
To:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH] sched/deadline: simplify SCHED_WARN_ON()

simplify SCHED_WARN_ON() code.

Signed-off-by: Hui Su <suhui_kernel@....com>
---
 kernel/sched/deadline.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index aaacd6cfd42f..f4f4b0a383c7 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -172,8 +172,7 @@ void __sub_running_bw(u64 dl_bw, struct dl_rq *dl_rq)
 
 	lockdep_assert_rq_held(rq_of_dl_rq(dl_rq));
 	dl_rq->running_bw -= dl_bw;
-	SCHED_WARN_ON(dl_rq->running_bw > old); /* underflow */
-	if (dl_rq->running_bw > old)
+	if (SCHED_WARN_ON(dl_rq->running_bw > old)) /* underflow */
 		dl_rq->running_bw = 0;
 	/* kick cpufreq (see the comment in kernel/sched/sched.h). */
 	cpufreq_update_util(rq_of_dl_rq(dl_rq), 0);
@@ -196,8 +195,7 @@ void __sub_rq_bw(u64 dl_bw, struct dl_rq *dl_rq)
 
 	lockdep_assert_rq_held(rq_of_dl_rq(dl_rq));
 	dl_rq->this_bw -= dl_bw;
-	SCHED_WARN_ON(dl_rq->this_bw > old); /* underflow */
-	if (dl_rq->this_bw > old)
+	if (SCHED_WARN_ON(dl_rq->this_bw > old)) /* underflow */
 		dl_rq->this_bw = 0;
 	SCHED_WARN_ON(dl_rq->running_bw > dl_rq->this_bw);
 }
-- 
2.25.1