Re: [PATCH v4 1/2] locking/rwsem: Add DEBUG_RWSEMS to look for lock/unlock mismatches

[Waiman Long]

On 03/29/2018 11:01 AM, Davidlohr Bueso wrote:
> On Thu, 29 Mar 2018, Waiman Long wrote:
>
>> Because it checks the owner field which is present only if
>> RWSEM_SPIN_ON_OWNER is defined. Mutex is different in the sense that the
>> owner field is always there no matter if MUTEX_SPIN_ON_OWNER is set
>> or not.
>
> Ah right; that's after Peter's mutex rewrite iirc. No objections from me.
>
> Acked-by: Davidlohr Bueso <dave@xxxxxxxxxxxx>

In reality, I think RWSEM_SPIN_ON_OWNER is almost always set if the xadd
version of rwsem is used. So we may do some cleanup here if necessary.

-Longman