From 780e0e6d3f3237f6a61957bfef0c8581993f6b1a Mon Sep 17 00:00:00 2001
From: Hui Su <sh_def@163.com>
Date: Tue, 7 Feb 2023 16:32:45 +0800
Subject: [PATCH] sched/fair: Remove superfluous lock section in
 do_sched_cfs_slack_timer()

mainline inclusion
from mainline-v5.11-rc1
commit cdb310474dece99985e4cdd2b96b1324e39c1c9d
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6DDGM
CVE: NA

Reference: https://github.com/torvalds/linux/commit/cdb310474dece99985e4cdd2b96b1324e39c1c9d

--------------------------------

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
Signed-off-by: zhaoxiaoqiang11 <zhaoxiaoqiang11@jd.com>
Reviewed-by: zhangwei <zhangwei123171@jd.com>
(cherry picked from commit 13f563ad128f4023e2899a6e3839ae62a8647c10)
---
 kernel/sched/fair.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 4485e985e35ae..e0d8f2e94c365 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5512,9 +5512,6 @@ 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);
 }
 
 /*
-- 
Gitee