linux-kernel - [PATCH -next] cpuset: Remove set but not used variable 'cs'

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Message-ID: <1543633976-183380-1-git-send-email-yuehaibing@huawei.com>
Date:   Sat, 1 Dec 2018 03:12:56 +0000
From:   YueHaibing <yuehaibing@...wei.com>
To:     Li Zefan <lizefan@...wei.com>, <tj@...nel.org>, <mingo@...nel.org>
CC:     YueHaibing <yuehaibing@...wei.com>, <cgroups@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kernel-janitors@...r.kernel.org>
Subject: [PATCH -next] cpuset: Remove set but not used variable 'cs'

Fixes gcc '-Wunused-but-set-variable' warning:

kernel/cgroup/cpuset.c: In function 'cpuset_cancel_attach':
kernel/cgroup/cpuset.c:2167:17: warning:
 variable 'cs' set but not used [-Wunused-but-set-variable]

It never used since introduction in commit 1f7dd3e5a6e4 ("cgroup: fix handling
of multi-destination migration from subtree_control enabling")

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 kernel/cgroup/cpuset.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index e9f6906..48cfe55 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2164,10 +2164,8 @@ static int cpuset_can_attach(struct cgroup_taskset *tset)
 static void cpuset_cancel_attach(struct cgroup_taskset *tset)
 {
 	struct cgroup_subsys_state *css;
-	struct cpuset *cs;
 
 	cgroup_taskset_first(tset, &css);
-	cs = css_cs(css);
 
 	mutex_lock(&cpuset_mutex);
 	css_cs(css)->attach_in_progress--;