[PATCH v5 11/28] block: Allow BIO-based drivers to use blk_revalidate_disk_zones()

[Bart Van Assche]

On 4/3/24 01:42, Damien Le Moal wrote:
> In preparation for allowing BIO based device drivers to use zone write
> plugging and its zone append emulation, allow these drivers to call
> blk_revalidate_disk_zones() so that all zone resources necessary to zone
> write plugging can be initialized.
> 
> To do so, remove the check in blk_revalidate_disk_zones() restricting
> the use of this function to mq request-based drivers to allow also
> BIO-based drivers to use it. This is safe to do as long as the
> BIO-based block device queue is already setup and usable, as it should,
> and can be safely frozen.
> 
> The helper function disk_need_zone_resources() is added to control the
> allocation and initialization of the zone write plug hash table and
> of the conventional zone bitmap only for mq devices and for BIO-based
> devices that require zone append emulation.

Reviewed-by: Bart Van Assche <bvanassche at acm.org>