[RFC][PATCH v2 21/31] timers: cgroup: Use del_timer_shutdown() before freeing timer

[Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>]

From: "Steven Rostedt (Google)" <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>

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

Link: https://lore.kernel.org/all/20220407161745.7d6754b3-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org/

Cc: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Zefan Li <lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org>
Cc: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Signed-off-by: Steven Rostedt (Google) <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.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 7f486677ab1f..4b15a481ca2c 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -1669,7 +1669,7 @@ 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);
+		del_timer_shutdown(&cfile->notify_timer);
 	}
 
 	kernfs_remove_by_name(cgrp->kn, cgroup_file_name(cgrp, cft, name));
-- 
2.35.1