Re: [RFC PATCH 07/12] locking/lockdep: Add support for nested terminal locks

[Peter Zijlstra]

On Thu, Nov 08, 2018 at 03:34:23PM -0500, Waiman Long wrote:
> There are use cases where we want to allow 2-level nesting of one
> terminal lock underneath another one. So the terminal lock type is now
> extended to support a new nested terminal lock where it can allow the
> acquisition of another regular terminal lock underneath it.

You're stretching things here... If you're allowing things under it, it
is no longer a terminal lock.

Why would you want to do such a thing?