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Subject[RFC][PATCH v3 21/33] timers: cgroup: Use timer_shutdown_sync() before freeing timer
From: "Steven Rostedt (Google)" <rostedt@goodmis.org>

Before a timer is freed, timer_shutdown_sync() must be called.

Link: https://lore.kernel.org/all/20220407161745.7d6754b3@gandalf.local.home/

Cc: Tejun Heo <tj@kernel.org>
Cc: Zefan Li <lizefan.x@bytedance.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: cgroups@vger.kernel.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
kernel/cgroup/cgroup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 2319946715e0..e0c59a3b52e5 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -1687,7 +1687,7 @@ static void cgroup_rm_file(struct cgroup *cgrp, const struct cftype *cft)
cfile->kn = NULL;
spin_unlock_irq(&cgroup_file_kn_lock);

- del_timer_sync(&cfile->notify_timer);
+ timer_shutdown_sync(&cfile->notify_timer);
}

kernfs_remove_by_name(cgrp->kn, cgroup_file_name(cgrp, cft, name));
--
2.35.1
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