[RFC][PATCH v3 21/33] timers: cgroup: Use timer_shutdown_sync() before freeing timer

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From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>

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

Link: https://lore.kernel.org/all/20220407161745.7d6754b3@xxxxxxxxxxxxxxxxxx/

Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Zefan Li <lizefan.x@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: cgroups@xxxxxxxxxxxxxxx
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
 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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