Re: [PATCH v5 07/15] locking/lockdep: Free lock classes that are no longer in use

[Peter Zijlstra]

On Thu, Jan 10, 2019 at 04:20:35PM +0100, Peter Zijlstra wrote:
> On Mon, Dec 17, 2018 at 01:29:54PM -0800, Bart Van Assche wrote:

> > +	/*
> > +	 * Leak *chain because it is not safe to reinsert it before an RCU
> > +	 * grace period has expired.
> > +	 */
> > +	new_chain = lock_chains + nr_lock_chains++;
> > +	*new_chain = *chain;
> > +	hlist_add_head_rcu(&new_chain->entry, chainhashentry(chain_key));
> > +#endif
> > +}
> 
> Leaking a chain_hlocks[] and lock_chains[] entry is pretty gross, but
> yes that should work.

/me finds patch 10 and goes.. ooh shiny ;-)