On Fri, Jun 19, 2020 at 05:23:17PM +0206, John Ogness wrote:
> The legacy CFQ IO scheduler could call put_io_context() in its exit_icq()
> elevator callback. This led to a lockdep warning, which was fixed in
> commit d8c66c5d5924 ("block: fix lockdep warning on io_context release
> put_io_context()") by using a nested subclass for the ioc spinlock.
> However, with commit f382fb0bcef4 ("block: remove legacy IO schedulers")
> the CFQ IO scheduler no longer exists.
>
> The BFQ IO scheduler also implements the exit_icq() elevator callback but
> does not call put_io_context().
>
> The nested subclass for the ioc spinlock is no longer needed. Since it
> existed as an exception and no longer applies, remove the nested subclass
> usage.
>
> Signed-off-by: John Ogness <[email protected]>
As far I can tell, looks good.
Reviewed-by: Daniel Wagner <[email protected]>
