[PATCH 4/8] block: add a store_limit operations for sysfs entries

[Christoph Hellwig]

On Tue, Jan 07, 2025 at 06:25:20PM +0800, Ming Lei wrote:
> __blk_mq_update_nr_hw_queues() freezes queue before acquiring ->syfs_lock too.
> 
> So yes, it is a mess wrt. order between ->sysfs_lock and freezing queue.

Let's sort out the current freeze vs limits lock issue first.  Next step
is to kill sysfs_lock in it's current form.