[PATCH -next] cgroup: remove set but not used variable 'cgrp'

[Yue Haibing]

From: YueHaibing <yuehaib...@huawei.com>

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

kernel/cgroup/cgroup.c: In function 'cgroup_post_fork':
kernel/cgroup/cgroup.c:5946:19: warning: variable 'cgrp' set but not used 
[-Wunused-but-set-variable]

It is never used since introduction in
commit 76f969e8948d ("cgroup: cgroup v2 freezer")

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 kernel/cgroup/cgroup.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 6f09f9b..c9f208d 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5943,11 +5943,8 @@ void cgroup_post_fork(struct task_struct *child)
                 * the task into the frozen state.
                 */
                if (unlikely(cgroup_task_freeze(child))) {
-                       struct cgroup *cgrp;
-
                        spin_lock(&child->sighand->siglock);
                        WARN_ON_ONCE(child->frozen);
-                       cgrp = cset->dfl_cgrp;
                        child->jobctl |= JOBCTL_TRAP_FREEZE;
                        spin_unlock(&child->sighand->siglock);
 
-- 
2.7.4