On Wed, Apr 10, 2019 at 02:42:19PM -0400, Waiman Long wrote: > The owner field in the rw_semaphore structure is used primarily for > optimistic spinning. However, identifying the rwsem owner can also be > helpful in debugging as well as tracing locking related issues when > analyzing crash dump. The owner field may also store state information > that can be important to the operation of the rwsem. > > So the owner field is now made a permanent member of the rw_semaphore > structure irrespective of CONFIG_RWSEM_SPIN_ON_OWNER.
sem->owner is still initialized under CONFIG_RWSEM_SPIN_ON_OWNER.
