Re: [PATCH v4 3/3] blk-mq: Fix a race between iterating over requests and freeing requests

[Bart Van Assche <bvanassche@xxxxxxx>]

On 4/2/21 8:37 PM, Khazhy Kumykov wrote:
> On Fri, Apr 2, 2021 at 8:26 PM Bart Van Assche <bvanassche@xxxxxxx> wrote:
>> On 4/2/21 4:59 PM, Khazhy Kumykov wrote:
>>> lockdep_is_held(&tags->iter_rwsem) ?
>>
>> I will change the second rcu_dereference_check() argument into the
>> following:
>>
>> rcu_read_lock_held() || lockdep_is_held(&tags->iter_rwsem)
>
> rcu_dereference_check() already has a || rcu_read_lock_held(), fwiw

>From a quick look it seems like other rcu_dereference_check() calls do
not specify rcu_read_lock_held() explicitly so I will leave it out.

Thanks,

Bart.