linux-kernel - [PATCH] cgroup/cpuset: no need to explicitly init a global static variable

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Message-Id: <20221220151415.856093-1-neelx@redhat.com>
Date:   Tue, 20 Dec 2022 16:14:15 +0100
From:   Daniel Vacek <neelx@...hat.com>
To:     Waiman Long <longman@...hat.com>,
        Zefan Li <lizefan.x@...edance.com>, Tejun Heo <tj@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>
Cc:     Daniel Vacek <neelx@...hat.com>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] cgroup/cpuset: no need to explicitly init a global static variable

cpuset_rwsem is a static variable. It's initialized at build time and so
there's no need for explicit runtime init leaking one percpu int.

Signed-off-by: Daniel Vacek <neelx@...hat.com>
---
 kernel/cgroup/cpuset.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index a29c0b13706bb..87fe410361b3d 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -3281,8 +3281,6 @@ struct cgroup_subsys cpuset_cgrp_subsys = {
 
 int __init cpuset_init(void)
 {
-	BUG_ON(percpu_init_rwsem(&cpuset_rwsem));
-
 	BUG_ON(!alloc_cpumask_var(&top_cpuset.cpus_allowed, GFP_KERNEL));
 	BUG_ON(!alloc_cpumask_var(&top_cpuset.effective_cpus, GFP_KERNEL));
 	BUG_ON(!zalloc_cpumask_var(&top_cpuset.subparts_cpus, GFP_KERNEL));
-- 
2.38.1