> + * Zoned block device information for mq I/O schedulers. > + * Set by low level device driver (stacking driver may not set this). > + */ > + unsigned int nr_zones; > + unsigned long *seq_zones; Might be worth explaining the seq_zones is a bit bitmap to check if a given zone number is sequential. And maybe give it a name that hints at that, like seq_zone_bitmap? Otherwise looks fine: Reviewed-by: Christoph Hellwig <hch@xxxxxx>