> +/**
> + * blk_check_logical_block_size - check if logical block size is supported
> + * by the kernel
> + * @size: the logical block size, in bytes
> + *
> + * Description:
> + * This function checks if the block layers supports given block size
> + **/
> +bool blk_is_valid_logical_block_size(unsigned int size)
> +{
> + return size >= SECTOR_SIZE && size <= PAGE_SIZE && !is_power_of_2(size);
Shouldn't this be a ... && is_power_of_2(size)?
> if (q->limits.io_min < q->limits.physical_block_size)
> q->limits.io_min = q->limits.physical_block_size;
> +
> }
This adds a pointless empty line.
> +extern bool blk_is_valid_logical_block_size(unsigned int size);
No need for externs on function declarations.
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