On Wed, Sep 19, 2018 at 03:45:23PM -0700, Bart Van Assche wrote:

Make it easier to understand the purpose of the functions that iterate
over requests by documenting their purpose. Fix three minor spelling
mistakes in comments in these functions.

[...]

 
+/*
+ * Call function @fn(@hctx, rq, @data, @reserved) for each request queued on
+ * @hctx that has been assigned a driver tag. @reserved indicates whether @bt
+ * is the breserved_tags member or the bitmap_tags member of struct
+ * blk_mq_tags.
+ */
 static void bt_for_each(struct blk_mq_hw_ctx *hctx, struct sbitmap_queue *bt,
 			busy_iter_fn *fn, void *data, bool reserved)

One minor nit and only if you have to re-send the series, can you
please also add the usual kernel-doc headers to the comments, i.e.:


/**
 * bt_for_each() - run callback on each hctx with a driver tag
 * @hctx:	the hardware context
 * @bt:		the sbitmap_queue
 * @fn:		the callback function to run
 * @data:	the data for the callback function
 * @reserved:	is reserved or not
 *
 * Call function @fn(@hctx, rq, @data, @reserved) for each request queued on
 * @hctx that has been assigned a driver tag. @reserved indicates whether @bt
 * is the breserved_tags member or the bitmap_tags member of struct
 * blk_mq_tags.
 */
static void bt_for_each(struct blk_mq_hw_ctx *hctx, struct sbitmap_queue *bt,
  			busy_iter_fn *fn, void *data, bool reserved)


Otherwise:
Reviewed-by: Johannes Thumshirn <redacted>
-- 
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