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Commit 0b302d5a authored by Tejun Heo's avatar Tejun Heo Committed by Jens Axboe
Browse files

block: kill blk_end_request_callback() 



With recent IDE updates, blk_end_request_callback() doesn't have any
user now.  Kill it.

[ Impact: removal of unused convoluted interface ]

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 158dbda0

block/blk-core.c

+3 −45
Original line number Diff line number Diff line
@@ -1971,10 +1971,6 @@ static void end_that_request_last(struct request *req, int error) 
 * @error:        %0 for success, < %0 for error

 * @nr_bytes:     number of bytes to complete @rq

 * @bidi_bytes:   number of bytes to complete @rq->next_rq

 * @drv_callback: function called between completion of bios in the request

 *                and completion of the request.

 *                If the callback returns non %0, this helper returns without

 *                completion of the request.

 *

 * Description:

 *     Ends I/O on a number of bytes attached to @rq and @rq->next_rq.
@@ -1985,8 +1981,7 @@ static void end_that_request_last(struct request *req, int error) 
 *     %1 - this request is not freed yet, it still has pending buffers.

 **/

static int blk_end_io(struct request *rq, int error, unsigned int nr_bytes,

		      unsigned int bidi_bytes,

		      int (drv_callback)(struct request *))

		      unsigned int bidi_bytes)

{

	struct request_queue *q = rq->q;

	unsigned long flags = 0UL;
@@ -1994,10 +1989,6 @@ static int blk_end_io(struct request *rq, int error, unsigned int nr_bytes, 
	if (end_that_request_data(rq, error, nr_bytes, bidi_bytes))

		return 1;



	/* Special feature for tricky drivers */

	if (drv_callback && drv_callback(rq))

		return 1;



	add_disk_randomness(rq->rq_disk);



	spin_lock_irqsave(q->queue_lock, flags);
@@ -2023,7 +2014,7 @@ static int blk_end_io(struct request *rq, int error, unsigned int nr_bytes, 
 **/

int blk_end_request(struct request *rq, int error, unsigned int nr_bytes)

{

	return blk_end_io(rq, error, nr_bytes, 0, NULL);

	return blk_end_io(rq, error, nr_bytes, 0);

}

EXPORT_SYMBOL_GPL(blk_end_request);
@@ -2070,7 +2061,7 @@ EXPORT_SYMBOL_GPL(__blk_end_request); 
int blk_end_bidi_request(struct request *rq, int error, unsigned int nr_bytes,

			 unsigned int bidi_bytes)

{

	return blk_end_io(rq, error, nr_bytes, bidi_bytes, NULL);

	return blk_end_io(rq, error, nr_bytes, bidi_bytes);

}

EXPORT_SYMBOL_GPL(blk_end_bidi_request);
@@ -2131,39 +2122,6 @@ void blk_update_request(struct request *rq, int error, unsigned int nr_bytes) 
}

EXPORT_SYMBOL_GPL(blk_update_request);



/**

 * blk_end_request_callback - Special helper function for tricky drivers

 * @rq:           the request being processed

 * @error:        %0 for success, < %0 for error

 * @nr_bytes:     number of bytes to complete

 * @drv_callback: function called between completion of bios in the request

 *                and completion of the request.

 *                If the callback returns non %0, this helper returns without

 *                completion of the request.

 *

 * Description:

 *     Ends I/O on a number of bytes attached to @rq.

 *     If @rq has leftover, sets it up for the next range of segments.

 *

 *     This special helper function is used only for existing tricky drivers.

 *     (e.g. cdrom_newpc_intr() of ide-cd)

 *     This interface will be removed when such drivers are rewritten.

 *     Don't use this interface in other places anymore.

 *

 * Return:

 *     %0 - we are done with this request

 *     %1 - this request is not freed yet.

 *          this request still has pending buffers or

 *          the driver doesn't want to finish this request yet.

 **/

int blk_end_request_callback(struct request *rq, int error,

			     unsigned int nr_bytes,

			     int (drv_callback)(struct request *))

{

	return blk_end_io(rq, error, nr_bytes, 0, drv_callback);

}

EXPORT_SYMBOL_GPL(blk_end_request_callback);



void blk_rq_bio_prep(struct request_queue *q, struct request *rq,

		     struct bio *bio)

{

include/linux/blkdev.h

+0 −3
Original line number Diff line number Diff line
@@ -855,9 +855,6 @@ extern int __blk_end_request(struct request *rq, int error, 
extern int blk_end_bidi_request(struct request *rq, int error,

				unsigned int nr_bytes, unsigned int bidi_bytes);

extern void end_request(struct request *, int);

extern int blk_end_request_callback(struct request *rq, int error,

				unsigned int nr_bytes,

				int (drv_callback)(struct request *));

extern void blk_complete_request(struct request *);

extern void __blk_complete_request(struct request *);

extern void blk_abort_request(struct request *);