> +static inline unsigned long *__alloc_zone_bitmap(int node,
> + unsigned int nr_zones)
> +{
> + return kcalloc_node(BITS_TO_LONGS(nr_zones), sizeof(unsigned long),
> + GFP_NOIO | __GFP_ZERO, node);
kcalloc already implies GFP_NOIO.
> +/*
> + * Allocate an array of struct blk_zone to get nr_zones zone information.
> + * The allocated array may be smaller than nr_zones.
> + */
> +static struct blk_zone *__alloc_zones(int node, unsigned int *nr_zones)
Any reason to have the __ prefix for these two functions? A blk_ one
would seem more sensible.
> +/**
> + * revalidate_disk_zones - (re)allocate and initialize zone bitmaps
> + * @disk: Target disk
> + *
> + * Description:
> + * Helper function for low-level device drivers to (re) allocate and
> + * initialize a disk request queue zone bitmaps. This functions should
> + * normally be called within the disk ->revalidate method.
> + * For BIO based queues, no zone bitmap is allocated.
> + */
> +int revalidate_disk_zones(struct gendisk *disk)
Add a blk_ prefix?
Also no need for the Description: header in the kerneldoc comment.
