From: Hui Su <sh_def@163.com>
Date: Fri, 30 Oct 2020 14:46:21 +0000 (+0800)
Subject: sched/fair: Remove superfluous lock section in do_sched_cfs_slack_timer()
X-Git-Tag: v5.11-rc1~174^2~28
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=cdb310474dece99985e4cdd2b96b1324e39c1c9d;p=thirdparty%2Fkernel%2Flinux.git

sched/fair: Remove superfluous lock section in do_sched_cfs_slack_timer()

Since ab93a4bc955b ("sched/fair: Remove distribute_running fromCFS
bandwidth"), there is nothing to protect between
raw_spin_lock_irqsave/store() in do_sched_cfs_slack_timer().

Signed-off-by: Hui Su <sh_def@163.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Phil Auld <pauld@redhat.com>
Reviewed-by: Ben Segall <bsegall@google.com>
Link: https://lkml.kernel.org/r/20201030144621.GA96974@rlk
---

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 2755a7e0f1ce1..3e5d98f861a18 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5126,9 +5126,6 @@ static void do_sched_cfs_slack_timer(struct cfs_bandwidth *cfs_b)
 		return;
 
 	distribute_cfs_runtime(cfs_b);
-
-	raw_spin_lock_irqsave(&cfs_b->lock, flags);
-	raw_spin_unlock_irqrestore(&cfs_b->lock, flags);
 }
 
 /*