bfq-iosched: remove unused variable

 */

static void bfq_update_depths(struct bfq_data *bfqd, struct sbitmap_queue *bt)

{

	bfqd->sb_shift = bt->sb.shift;

	/*

	 * In-word depths if no bfq_queue is being weight-raised:

	 * leaving 25% of tags only for sync reads.

	 *

	 * In next formulas, right-shift the value

	 * (1U<<bfqd->sb_shift), instead of computing directly

	 * (1U<<(bfqd->sb_shift - something)), to be robust against

	 * any possible value of bfqd->sb_shift, without having to

	 * (1U<<bt->sb.shift), instead of computing directly

	 * (1U<<(bt->sb.shift - something)), to be robust against

	 * any possible value of bt->sb.shift, without having to

	 * limit 'something'.

	 */

	/* no more than 50% of tags for async I/O */

	bfqd->word_depths[0][0] = max((1U<<bfqd->sb_shift)>>1, 1U);

	bfqd->word_depths[0][0] = max((1U << bt->sb.shift) >> 1, 1U);

	/*

	 * no more than 75% of tags for sync writes (25% extra tags

	 * w.r.t. async I/O, to prevent async I/O from starving sync

	 * writes)

	 */

	bfqd->word_depths[0][1] = max(((1U<<bfqd->sb_shift) * 3)>>2, 1U);

	bfqd->word_depths[0][1] = max(((1U << bt->sb.shift) * 3) >> 2, 1U);

	/*

	 * In-word depths in case some bfq_queue is being weight-

	 * shortage.

	 */

	/* no more than ~18% of tags for async I/O */

	bfqd->word_depths[1][0] = max(((1U<<bfqd->sb_shift) * 3)>>4, 1U);

	bfqd->word_depths[1][0] = max(((1U << bt->sb.shift) * 3) >> 4, 1U);

	/* no more than ~37% of tags for sync writes (~20% extra tags) */

	bfqd->word_depths[1][1] = max(((1U<<bfqd->sb_shift) * 6)>>4, 1U);

	bfqd->word_depths[1][1] = max(((1U << bt->sb.shift) * 6) >> 4, 1U);

}

static int bfq_init_hctx(struct blk_mq_hw_ctx *hctx, unsigned int index)

	/* bfqq associated with the task issuing current bio for merging */

	struct bfq_queue *bio_bfqq;

	/*

	 * Cached sbitmap shift, used to compute depth limits in

	 * bfq_update_depths.

	 */

	unsigned int sb_shift;

	/*

	 * Depth limits used in bfq_limit_depth (see comments on the

	 * function)