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 1f7dd3e5 ("cgroup: fix handling of multi-destination migration from subtree_control enabling") Signed-off-by: NYueHaibing <yuehaibing@huawei.com> Signed-off-by: NTejun Heo <tj@kernel.org>
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