Re: [PATCH 1/2] block: Expose discard granularity

[Christoph Hellwig <hch@infradead.org>]

On Thu, Oct 29, 2009 at 11:30:08PM -0400, Martin K. Petersen wrote:
> + * blk_queue_discard_granularity - set minimum size for discard requests
> + * @q:	the request queue for the device
> + * @gran:  the smallest unit the device can discard (in bytes)
> + *
> + * Description:
> + */
> +void blk_queue_discard_granularity(struct request_queue *q, unsigned int gran)
> +{
> +	q->limits.discard_granularity = gran;
> +}
> +EXPORT_SYMBOL(blk_queue_discard_granularity);
> +

> +static inline unsigned int queue_discard_granularity(struct request_queue *q)
> +{
> +	return q->limits.discard_granularity;
> +}
> +
> +static inline unsigned int queue_max_discard_sectors(struct request_queue *q)
> +{
> +	return q->limits.max_discard_sectors;
> +}
> +


Btw, I really hate these wrapper, they make followign the code much
harder.  Already annoyed me for the I/O topology bits.