On Fri 23-11-12 09:55:32, Michal Hocko wrote:
[...]
> Besides that rcu_read_{un}lock are not necessary if you keep the
> reference, right? The last dput happens only after the last css_put.
Stupid me. And of course rcu_dereference_check would tell me the truth
> > +const char *cgroup_name(const struct cgroup *cgrp)
> > +{
> > + struct dentry *dentry;
> > + rcu_read_lock();
> > + dentry = rcu_dereference_check(cgrp->dentry, cgroup_lock_is_held());
> > + rcu_read_unlock();
> > + return dentry->d_name.name;
> > +}
> > +
--
Michal Hocko
SUSE Labs
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