On Fri, Aug 16, 2019 at 01:18:14PM +0200, Sebastian Andrzej Siewior wrote: > I was looking at the lifetime of the the ->css_rstat_flush() to see if > cgroup_rstat_cpu_lock should remain a raw_spinlock_t. I didn't find any > users and is unused since it was introduced in commit > 8f53470bab042 ("cgroup: Add cgroup_subsys->css_rstat_flush()") > > Remove the css_rstat_flush callback because it has no users. > > Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> Yeah, I'd rather keep it. The patch which used this didn't get merged but the use case is valid and it will likely be used for different cases. Thanks. -- tejun