[PATCH 007 of 35] Drop 'size' argument from bio_endio and bi_end_io.

[NeilBrown <neilb@suse.de>]

As bi_end_io is only called once when the reqeust is compelte,
the 'size' argument is now redundant.  Remove it.

Now there is no need for bio_endio to subtract the size completed
from bi_size.  So don't do that either.

While we are at it, change bi_end_io to return void.

Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./block/ll_rw_blk.c            |   22 +++++++-----------
 ./drivers/block/aoe/aoedev.c   |    4 +--
 ./drivers/block/cciss.c        |    2 -
 ./drivers/block/cpqarray.c     |    2 -
 ./drivers/block/floppy.c       |    6 -----
 ./drivers/block/loop.c         |    4 +--
 ./drivers/block/pktcdvd.c      |   25 +++++----------------
 ./drivers/block/rd.c           |    4 +--
 ./drivers/block/umem.c         |    2 -
 ./drivers/md/dm-crypt.c        |   21 +++++------------
 ./drivers/md/dm-emc.c          |    5 ----
 ./drivers/md/dm-io.c           |    8 ------
 ./drivers/md/dm-mpath.c        |    4 +--
 ./drivers/md/dm-raid1.c        |    4 +--
 ./drivers/md/dm-snap.c         |    2 -
 ./drivers/md/dm-zero.c         |    2 -
 ./drivers/md/dm.c              |   18 +++++----------
 ./drivers/md/faulty.c          |   10 +++-----
 ./drivers/md/linear.c          |    4 +--
 ./drivers/md/md.c              |   25 ++++++---------------
 ./drivers/md/multipath.c       |   13 +++--------
 ./drivers/md/raid0.c           |    4 +--
 ./drivers/md/raid1.c           |   30 +++++--------------------
 ./drivers/md/raid10.c          |   31 ++++++--------------------
 ./drivers/md/raid5.c           |   48 +++++++++++++----------------------------
 ./drivers/s390/block/dcssblk.c |    4 +--
 ./drivers/s390/block/xpram.c   |    6 +----
 ./drivers/scsi/scsi_lib.c      |   10 ++------
 ./fs/bio.c                     |   41 +++++++----------------------------
 ./fs/block_dev.c               |    2 -
 ./fs/buffer.c                  |    6 -----
 ./fs/direct-io.c               |   13 +----------
 ./fs/ext4/writeback.c          |    5 ----
 ./fs/gfs2/super.c              |    4 ---
 ./fs/jfs/jfs_logmgr.c          |    5 ----
 ./fs/jfs/jfs_metapage.c        |   12 +---------
 ./fs/mpage.c                   |   12 +---------
 ./fs/ocfs2/cluster/heartbeat.c |    4 ---
 ./fs/reiser4/flush_queue.c     |    7 -----
 ./fs/reiser4/page_cache.c      |   18 +--------------
 ./fs/reiser4/status_flags.c    |    5 ----
 ./fs/xfs/linux-2.6/xfs_aops.c  |    4 ---
 ./fs/xfs/linux-2.6/xfs_buf.c   |    4 ---
 ./include/linux/bio.h          |    6 ++---
 ./include/linux/swap.h         |    2 -
 ./mm/bounce.c                  |   25 ++++-----------------
 ./mm/page_io.c                 |   12 +---------
 47 files changed, 140 insertions(+), 367 deletions(-)

diff .prev/block/ll_rw_blk.c ./block/ll_rw_blk.c
--- .prev/block/ll_rw_blk.c	2007-07-31 11:20:47.000000000 +1000
+++ ./block/ll_rw_blk.c	2007-07-31 11:20:51.000000000 +1000
@@ -527,7 +527,7 @@ int blk_do_ordered(struct request_queue 
 	return 1;
 }
 
-static int flush_dry_bio_endio(struct bio *bio, unsigned int bytes, int error)
+static void flush_dry_bio_endio(struct bio *bio, int error)
 {
 
 	/*
@@ -538,14 +538,10 @@ static int flush_dry_bio_endio(struct bi
 
 	/* Reset bio */
 	set_bit(BIO_UPTODATE, &bio->bi_flags);
-	bio->bi_size = bytes;
-	bio->bi_sector -= (bytes >> 9);
-
-	return 0;
 }
 
 static int ordered_bio_endio(struct request *rq, struct bio *bio,
-			     unsigned int nbytes, int error)
+			     int error)
 {
 	struct request_queue *q = rq->q;
 	bio_end_io_t *endio;
@@ -565,7 +561,7 @@ static int ordered_bio_endio(struct requ
 	bio->bi_end_io = flush_dry_bio_endio;
 	bio->bi_private = q;
 
-	bio_endio(bio, nbytes, error);
+	bio_endio(bio, error);
 
 	bio->bi_end_io = endio;
 	bio->bi_private = private;
@@ -2401,7 +2397,7 @@ static int __blk_rq_map_user(struct requ
 
 unmap_bio:
 	/* if it was boucned we must call the end io function */
-	bio_endio(bio, bio->bi_size, 0);
+	bio_endio(bio, 0);
 	__blk_rq_unmap_user(orig_bio);
 	bio_put(bio);
 	return ret;
@@ -2510,7 +2506,7 @@ int blk_rq_map_user_iov(struct request_q
 		return PTR_ERR(bio);
 
 	if (bio->bi_size != len) {
-		bio_endio(bio, bio->bi_size, 0);
+		bio_endio(bio, 0);
 		bio_unmap_user(bio);
 		return -EINVAL;
 	}
@@ -3048,7 +3044,7 @@ out:
 	return 0;
 
 end_io:
-	bio_endio(bio, nr_sectors << 9, err);
+	bio_endio(bio, err);
 	return 0;
 }
 
@@ -3191,7 +3187,7 @@ static inline void __generic_make_reques
 				bdevname(bio->bi_bdev, b),
 				(long long) bio->bi_sector);
 end_io:
-			bio_endio(bio, bio->bi_size, -EIO);
+			bio_endio(bio, -EIO);
 			break;
 		}
 
@@ -3406,8 +3402,8 @@ static int __end_that_request_first(stru
 		if (nr_bytes >= bio->bi_size) {
 			req->bio = bio->bi_next;
 			nbytes = bio->bi_size;
-			if (!ordered_bio_endio(req, bio, nbytes, error))
-				bio_endio(bio, nbytes, error);
+			if (!ordered_bio_endio(req, bio, error))
+				bio_endio(bio, error);
 			req->first_offset = 0;
 			next_idx = 0;
 			bio_nbytes = 0;

diff .prev/drivers/block/aoe/aoedev.c ./drivers/block/aoe/aoedev.c
--- .prev/drivers/block/aoe/aoedev.c	2007-07-31 11:20:17.000000000 +1000
+++ ./drivers/block/aoe/aoedev.c	2007-07-31 11:20:51.000000000 +1000
@@ -119,7 +119,7 @@ aoedev_downdev(struct aoedev *d)
 		bio = buf->bio;
 		if (--buf->nframesout == 0) {
 			mempool_free(buf, d->bufpool);
-			bio_endio(bio, bio->bi_size, -EIO);
+			bio_endio(bio, -EIO);
 		}
 		skb_shinfo(f->skb)->nr_frags = f->skb->data_len = 0;
 	}
@@ -130,7 +130,7 @@ aoedev_downdev(struct aoedev *d)
 		list_del(d->bufq.next);
 		bio = buf->bio;
 		mempool_free(buf, d->bufpool);
-		bio_endio(bio, bio->bi_size, -EIO);
+		bio_endio(bio, -EIO);
 	}
 
 	if (d->gd)

diff .prev/drivers/block/cciss.c ./drivers/block/cciss.c
--- .prev/drivers/block/cciss.c	2007-07-31 11:20:17.000000000 +1000
+++ ./drivers/block/cciss.c	2007-07-31 11:20:51.000000000 +1000
@@ -1194,7 +1194,7 @@ static inline void complete_buffers(stru
 		int nr_sectors = bio_sectors(bio);
 
 		bio->bi_next = NULL;
-		bio_endio(bio, nr_sectors << 9, status ? 0 : -EIO);
+		bio_endio(bio, status ? 0 : -EIO);
 		bio = xbh;
 	}
 }

diff .prev/drivers/block/cpqarray.c ./drivers/block/cpqarray.c
--- .prev/drivers/block/cpqarray.c	2007-07-31 11:20:17.000000000 +1000
+++ ./drivers/block/cpqarray.c	2007-07-31 11:20:51.000000000 +1000
@@ -988,7 +988,7 @@ static inline void complete_buffers(stru
 		xbh = bio->bi_next;
 		bio->bi_next = NULL;
 		
-		bio_endio(bio, nr_sectors << 9, ok ? 0 : -EIO);
+		bio_endio(bio, ok ? 0 : -EIO);
 
 		bio = xbh;
 	}

diff .prev/drivers/block/floppy.c ./drivers/block/floppy.c
--- .prev/drivers/block/floppy.c	2007-07-31 11:20:44.000000000 +1000
+++ ./drivers/block/floppy.c	2007-07-31 11:20:51.000000000 +1000
@@ -3812,14 +3812,10 @@ static int check_floppy_change(struct ge
  * a disk in the drive, and whether that disk is writable.
  */
 
-static int floppy_rb0_complete(struct bio *bio, unsigned int bytes_done,
+static void floppy_rb0_complete(struct bio *bio,
 			       int err)
 {
-	if (bio->bi_size)
-		return 1;
-
 	complete((struct completion *)bio->bi_private);
-	return 0;
 }
 
 static int __floppy_read_block_0(struct block_device *bdev)

diff .prev/drivers/block/loop.c ./drivers/block/loop.c
--- .prev/drivers/block/loop.c	2007-07-31 11:20:17.000000000 +1000
+++ ./drivers/block/loop.c	2007-07-31 11:20:51.000000000 +1000
@@ -532,7 +532,7 @@ static int loop_make_request(struct requ
 
 out:
 	spin_unlock_irq(&lo->lo_lock);
-	bio_io_error(old_bio, old_bio->bi_size);
+	bio_io_error(old_bio);
 	return 0;
 }
 
@@ -561,7 +561,7 @@ static inline void loop_handle_bio(struc
 		bio_put(bio);
 	} else {
 		int ret = do_bio_filebacked(lo, bio);
-		bio_endio(bio, bio->bi_size, ret);
+		bio_endio(bio, ret);
 	}
 }
 

diff .prev/drivers/block/pktcdvd.c ./drivers/block/pktcdvd.c
--- .prev/drivers/block/pktcdvd.c	2007-07-31 11:20:17.000000000 +1000
+++ ./drivers/block/pktcdvd.c	2007-07-31 11:20:51.000000000 +1000
@@ -1058,15 +1058,12 @@ static void pkt_make_local_copy(struct p
 	}
 }
 
-static int pkt_end_io_read(struct bio *bio, unsigned int bytes_done, int err)
+static void pkt_end_io_read(struct bio *bio, int err)
 {
 	struct packet_data *pkt = bio->bi_private;
 	struct pktcdvd_device *pd = pkt->pd;
 	BUG_ON(!pd);
 
-	if (bio->bi_size)
-		return 1;
-
 	VPRINTK("pkt_end_io_read: bio=%p sec0=%llx sec=%llx err=%d\n", bio,
 		(unsigned long long)pkt->sector, (unsigned long long)bio->bi_sector, err);
 
@@ -1077,19 +1074,14 @@ static int pkt_end_io_read(struct bio *b
 		wake_up(&pd->wqueue);
 	}
 	pkt_bio_finished(pd);
-
-	return 0;
 }
 
-static int pkt_end_io_packet_write(struct bio *bio, unsigned int bytes_done, int err)
+static void pkt_end_io_packet_write(struct bio *bio, int err)
 {
 	struct packet_data *pkt = bio->bi_private;
 	struct pktcdvd_device *pd = pkt->pd;
 	BUG_ON(!pd);
 
-	if (bio->bi_size)
-		return 1;
-
 	VPRINTK("pkt_end_io_packet_write: id=%d, err=%d\n", pkt->id, err);
 
 	pd->stats.pkt_ended++;
@@ -1098,7 +1090,6 @@ static int pkt_end_io_packet_write(struc
 	atomic_dec(&pkt->io_wait);
 	atomic_inc(&pkt->run_sm);
 	wake_up(&pd->wqueue);
-	return 0;
 }
 
 /*
@@ -1470,7 +1461,7 @@ static void pkt_finish_packet(struct pac
 	while (bio) {
 		next = bio->bi_next;
 		bio->bi_next = NULL;
-		bio_endio(bio, bio->bi_size, uptodate ? 0 : -EIO);
+		bio_endio(bio, uptodate ? 0 : -EIO);
 		bio = next;
 	}
 	pkt->orig_bios = pkt->orig_bios_tail = NULL;
@@ -2462,19 +2453,15 @@ static int pkt_close(struct inode *inode
 }
 
 
-static int pkt_end_io_read_cloned(struct bio *bio, unsigned int bytes_done, int err)
+static void pkt_end_io_read_cloned(struct bio *bio, int err)
 {
 	struct packet_stacked_data *psd = bio->bi_private;
 	struct pktcdvd_device *pd = psd->pd;
 
-	if (bio->bi_size)
-		return 1;
-
 	bio_put(bio);
-	bio_endio(psd->bio, psd->bio->bi_size, err);
+	bio_endio(psd->bio, err);
 	mempool_free(psd, psd_pool);
 	pkt_bio_finished(pd);
-	return 0;
 }
 
 static int pkt_make_request(struct request_queue *q, struct bio *bio)
@@ -2620,7 +2607,7 @@ static int pkt_make_request(struct reque
 	}
 	return 0;
 end_io:
-	bio_io_error(bio, bio->bi_size);
+	bio_io_error(bio);
 	return 0;
 }
 

diff .prev/drivers/block/rd.c ./drivers/block/rd.c
--- .prev/drivers/block/rd.c	2007-07-31 11:20:17.000000000 +1000
+++ ./drivers/block/rd.c	2007-07-31 11:20:51.000000000 +1000
@@ -287,10 +287,10 @@ static int rd_make_request(struct reques
 	if (ret)
 		goto fail;
 
-	bio_endio(bio, bio->bi_size, 0);
+	bio_endio(bio, 0);
 	return 0;
 fail:
-	bio_io_error(bio, bio->bi_size);
+	bio_io_error(bio);
 	return 0;
 } 
 

diff .prev/drivers/block/umem.c ./drivers/block/umem.c
--- .prev/drivers/block/umem.c	2007-07-31 11:20:17.000000000 +1000
+++ ./drivers/block/umem.c	2007-07-31 11:20:51.000000000 +1000
@@ -532,7 +532,7 @@ static void process_page(unsigned long d
 
 		return_bio = bio->bi_next;
 		bio->bi_next = NULL;
-		bio_endio(bio, bio->bi_size, 0);
+		bio_endio(bio, 0);
 	}
 }
 

diff .prev/drivers/md/dm.c ./drivers/md/dm.c
--- .prev/drivers/md/dm.c	2007-07-31 11:20:17.000000000 +1000
+++ ./drivers/md/dm.c	2007-07-31 11:20:51.000000000 +1000
@@ -490,23 +490,20 @@ static void dec_pending(struct dm_io *io
 			blk_add_trace_bio(io->md->queue, io->bio,
 					  BLK_TA_COMPLETE);
 
-			bio_endio(io->bio, io->bio->bi_size, io->error);
+			bio_endio(io->bio, io->error);
 		}
 
 		free_io(io->md, io);
 	}
 }
 
-static int clone_endio(struct bio *bio, unsigned int done, int error)
+static void clone_endio(struct bio *bio, int error)
 {
 	int r = 0;
 	struct dm_target_io *tio = bio->bi_private;
 	struct mapped_device *md = tio->io->md;
 	dm_endio_fn endio = tio->ti->type->end_io;
 
-	if (bio->bi_size)
-		return 1;
-
 	if (!bio_flagged(bio, BIO_UPTODATE) && !error)
 		error = -EIO;
 
@@ -520,7 +517,7 @@ static int clone_endio(struct bio *bio, 
 			error = r;
 		else if (r == DM_ENDIO_INCOMPLETE)
 			/* The target will handle the io */
-			return 1;
+			return;
 		else if (r) {
 			DMWARN("unimplemented target endio return value: %d", r);
 			BUG();
@@ -536,7 +533,6 @@ static int clone_endio(struct bio *bio, 
 
 	bio_put(bio);
 	free_tio(md, tio);
-	return r;
 }
 
 static sector_t max_io_len(struct mapped_device *md,
@@ -767,7 +763,7 @@ static void __split_bio(struct mapped_de
 
 	ci.map = dm_get_table(md);
 	if (!ci.map) {
-		bio_io_error(bio, bio->bi_size);
+		bio_io_error(bio);
 		return;
 	}
 
@@ -809,7 +805,7 @@ static int dm_request(struct request_que
 	 * guarantee it is (or can be) handled by the targets correctly.
 	 */
 	if (unlikely(bio_barrier(bio))) {
-		bio_endio(bio, bio->bi_size, -EOPNOTSUPP);
+		bio_endio(bio, -EOPNOTSUPP);
 		return 0;
 	}
 
@@ -826,13 +822,13 @@ static int dm_request(struct request_que
 		up_read(&md->io_lock);
 
 		if (bio_rw(bio) == READA) {
-			bio_io_error(bio, bio->bi_size);
+			bio_io_error(bio);
 			return 0;
 		}
 
 		r = queue_io(md, bio);
 		if (r < 0) {
-			bio_io_error(bio, bio->bi_size);
+			bio_io_error(bio);
 			return 0;
 
 		} else if (r == 0)

diff .prev/drivers/md/dm-crypt.c ./drivers/md/dm-crypt.c
--- .prev/drivers/md/dm-crypt.c	2007-07-31 11:20:17.000000000 +1000
+++ ./drivers/md/dm-crypt.c	2007-07-31 11:20:51.000000000 +1000
@@ -489,7 +489,7 @@ static void dec_pending(struct dm_crypt_
 	if (!atomic_dec_and_test(&io->pending))
 		return;
 
-	bio_endio(io->base_bio, io->base_bio->bi_size, io->error);
+	bio_endio(io->base_bio, io->error);
 
 	mempool_free(io, cc->io_pool);
 }
@@ -509,25 +509,19 @@ static void kcryptd_queue_io(struct dm_c
 	queue_work(_kcryptd_workqueue, &io->work);
 }
 
-static int crypt_endio(struct bio *clone, unsigned int done, int error)
+static void crypt_endio(struct bio *clone, int error)
 {
 	struct dm_crypt_io *io = clone->bi_private;
 	struct crypt_config *cc = io->target->private;
 	unsigned read_io = bio_data_dir(clone) == READ;
 
 	/*
-	 * free the processed pages, even if
-	 * it's only a partially completed write
+	 * free the processed pages
 	 */
-	if (!read_io)
-		crypt_free_buffer_pages(cc, clone, done);
-
-	/* keep going - not finished yet */
-	if (unlikely(clone->bi_size))
-		return 1;
-
-	if (!read_io)
+	if (!read_io) {
+		crypt_free_buffer_pages(cc, clone, clone->bi_size);
 		goto out;
+	}
 
 	if (unlikely(!bio_flagged(clone, BIO_UPTODATE))) {
 		error = -EIO;
@@ -537,12 +531,11 @@ static int crypt_endio(struct bio *clone
 	bio_put(clone);
 	io->post_process = 1;
 	kcryptd_queue_io(io);
-	return 0;
+	return;
 
 out:
 	bio_put(clone);
 	dec_pending(io, error);
-	return error;
 }
 
 static void clone_init(struct dm_crypt_io *io, struct bio *clone)

diff .prev/drivers/md/dm-emc.c ./drivers/md/dm-emc.c
--- .prev/drivers/md/dm-emc.c	2007-07-31 11:20:42.000000000 +1000
+++ ./drivers/md/dm-emc.c	2007-07-31 11:20:51.000000000 +1000
@@ -38,13 +38,10 @@ static inline void free_bio(struct bio *
 	bio_put(bio);
 }
 
-static int emc_endio(struct bio *bio, unsigned int bytes_done, int error)
+static void emc_endio(struct bio *bio, int error)
 {
 	struct dm_path *path = bio->bi_private;
 
-	if (bio->bi_size)
-		return 1;
-
 	/* We also need to look at the sense keys here whether or not to
 	 * switch to the next PG etc.
 	 *

diff .prev/drivers/md/dm-io.c ./drivers/md/dm-io.c
--- .prev/drivers/md/dm-io.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/dm-io.c	2007-07-31 11:20:51.000000000 +1000
@@ -124,15 +124,11 @@ static void dec_count(struct io *io, uns
 	}
 }
 
-static int endio(struct bio *bio, unsigned int done, int error)
+static void endio(struct bio *bio, int error)
 {
 	struct io *io;
 	unsigned region;
 
-	/* keep going until we've finished */
-	if (bio->bi_size)
-		return 1;
-
 	if (error && bio_data_dir(bio) == READ)
 		zero_fill_bio(bio);
 
@@ -146,8 +142,6 @@ static int endio(struct bio *bio, unsign
 	bio_put(bio);
 
 	dec_count(io, region, error);
-
-	return 0;
 }
 
 /*-----------------------------------------------------------------

diff .prev/drivers/md/dm-mpath.c ./drivers/md/dm-mpath.c
--- .prev/drivers/md/dm-mpath.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/dm-mpath.c	2007-07-31 11:20:51.000000000 +1000
@@ -391,11 +391,11 @@ static void dispatch_queued_ios(struct m
 
 		r = map_io(m, bio, mpio, 1);
 		if (r < 0)
-			bio_endio(bio, bio->bi_size, r);
+			bio_endio(bio, r);
 		else if (r == DM_MAPIO_REMAPPED)
 			generic_make_request(bio);
 		else if (r == DM_MAPIO_REQUEUE)
-			bio_endio(bio, bio->bi_size, -EIO);
+			bio_endio(bio, -EIO);
 
 		bio = next;
 	}

diff .prev/drivers/md/dm-raid1.c ./drivers/md/dm-raid1.c
--- .prev/drivers/md/dm-raid1.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/dm-raid1.c	2007-07-31 11:20:51.000000000 +1000
@@ -820,7 +820,7 @@ static void write_callback(unsigned long
 				break;
 			}
 	}
-	bio_endio(bio, bio->bi_size, 0);
+	bio_endio(bio, 0);
 }
 
 static void do_write(struct mirror_set *ms, struct bio *bio)
@@ -900,7 +900,7 @@ static void do_writes(struct mirror_set 
 	 */
 	if (unlikely(ms->log_failure))
 		while ((bio = bio_list_pop(&sync)))
-			bio_endio(bio, bio->bi_size, -EIO);
+			bio_endio(bio, -EIO);
 	else while ((bio = bio_list_pop(&sync)))
 		do_write(ms, bio);
 

diff .prev/drivers/md/dm-snap.c ./drivers/md/dm-snap.c
--- .prev/drivers/md/dm-snap.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/dm-snap.c	2007-07-31 11:20:51.000000000 +1000
@@ -636,7 +636,7 @@ static void error_bios(struct bio *bio)
 	while (bio) {
 		n = bio->bi_next;
 		bio->bi_next = NULL;
-		bio_io_error(bio, bio->bi_size);
+		bio_io_error(bio);
 		bio = n;
 	}
 }

diff .prev/drivers/md/dm-zero.c ./drivers/md/dm-zero.c
--- .prev/drivers/md/dm-zero.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/dm-zero.c	2007-07-31 11:20:51.000000000 +1000
@@ -43,7 +43,7 @@ static int zero_map(struct dm_target *ti
 		break;
 	}
 
-	bio_endio(bio, bio->bi_size, 0);
+	bio_endio(bio, 0);
 
 	/* accepted bio, don't make new request */
 	return DM_MAPIO_SUBMITTED;

diff .prev/drivers/md/faulty.c ./drivers/md/faulty.c
--- .prev/drivers/md/faulty.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/faulty.c	2007-07-31 11:20:51.000000000 +1000
@@ -65,18 +65,16 @@
 #include <linux/raid/md.h>
 
 
-static int faulty_fail(struct bio *bio, unsigned int bytes_done, int error)
+static void faulty_fail(struct bio *bio, int error)
 {
 	struct bio *b = bio->bi_private;
 
 	b->bi_size = bio->bi_size;
 	b->bi_sector = bio->bi_sector;
 
-	if (bio->bi_size == 0)
-		bio_put(bio);
+	bio_put(bio);
 
-	clear_bit(BIO_UPTODATE, &b->bi_flags);
-	return (b->bi_end_io)(b, bytes_done, -EIO);
+	bio_io_error(b);
 }
 
 typedef struct faulty_conf {
@@ -179,7 +177,7 @@ static int make_request(struct request_q
 			/* special case - don't decrement, don't generic_make_request,
 			 * just fail immediately
 			 */
-			bio_endio(bio, bio->bi_size, -EIO);
+			bio_endio(bio, -EIO);
 			return 0;
 		}
 

diff .prev/drivers/md/linear.c ./drivers/md/linear.c
--- .prev/drivers/md/linear.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/linear.c	2007-07-31 11:20:51.000000000 +1000
@@ -338,7 +338,7 @@ static int linear_make_request (struct r
 	sector_t block;
 
 	if (unlikely(bio_barrier(bio))) {
-		bio_endio(bio, bio->bi_size, -EOPNOTSUPP);
+		bio_endio(bio, -EOPNOTSUPP);
 		return 0;
 	}
 
@@ -358,7 +358,7 @@ static int linear_make_request (struct r
 			bdevname(tmp_dev->rdev->bdev, b),
 			(unsigned long long)tmp_dev->size,
 		        (unsigned long long)tmp_dev->offset);
-		bio_io_error(bio, bio->bi_size);
+		bio_io_error(bio);
 		return 0;
 	}
 	if (unlikely(bio->bi_sector + (bio->bi_size >> 9) >

diff .prev/drivers/md/md.c ./drivers/md/md.c
--- .prev/drivers/md/md.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/md.c	2007-07-31 11:20:51.000000000 +1000
@@ -213,7 +213,7 @@ static DEFINE_SPINLOCK(all_mddevs_lock);
 
 static int md_fail_request (struct request_queue *q, struct bio *bio)
 {
-	bio_io_error(bio, bio->bi_size);
+	bio_io_error(bio);
 	return 0;
 }
 
@@ -384,12 +384,10 @@ static void free_disk_sb(mdk_rdev_t * rd
 }
 
 
-static int super_written(struct bio *bio, unsigned int bytes_done, int error)
+static void super_written(struct bio *bio, int error)
 {
 	mdk_rdev_t *rdev = bio->bi_private;
 	mddev_t *mddev = rdev->mddev;
-	if (bio->bi_size)
-		return 1;
 
 	if (error || !test_bit(BIO_UPTODATE, &bio->bi_flags)) {
 		printk("md: super_written gets error=%d, uptodate=%d\n",
@@ -401,16 +399,13 @@ static int super_written(struct bio *bio
 	if (atomic_dec_and_test(&mddev->pending_writes))
 		wake_up(&mddev->sb_wait);
 	bio_put(bio);
-	return 0;
 }
 
-static int super_written_barrier(struct bio *bio, unsigned int bytes_done, int error)
+static void super_written_barrier(struct bio *bio, int error)
 {
 	struct bio *bio2 = bio->bi_private;
 	mdk_rdev_t *rdev = bio2->bi_private;
 	mddev_t *mddev = rdev->mddev;
-	if (bio->bi_size)
-		return 1;
 
 	if (!test_bit(BIO_UPTODATE, &bio->bi_flags) &&
 	    error == -EOPNOTSUPP) {
@@ -424,11 +419,11 @@ static int super_written_barrier(struct 
 		spin_unlock_irqrestore(&mddev->write_lock, flags);
 		wake_up(&mddev->sb_wait);
 		bio_put(bio);
-		return 0;
+	} else {
+		bio_put(bio2);
+		bio->bi_private = rdev;
+		super_written(bio, error);
 	}
-	bio_put(bio2);
-	bio->bi_private = rdev;
-	return super_written(bio, bytes_done, error);
 }
 
 void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
@@ -489,13 +484,9 @@ void md_super_wait(mddev_t *mddev)
 	finish_wait(&mddev->sb_wait, &wq);
 }
 
-static int bi_complete(struct bio *bio, unsigned int bytes_done, int error)
+static void bi_complete(struct bio *bio, int error)
 {
-	if (bio->bi_size)
-		return 1;
-
 	complete((struct completion*)bio->bi_private);
-	return 0;
 }
 
 int sync_page_io(struct block_device *bdev, sector_t sector, int size,

diff .prev/drivers/md/multipath.c ./drivers/md/multipath.c
--- .prev/drivers/md/multipath.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/multipath.c	2007-07-31 11:20:51.000000000 +1000
@@ -82,21 +82,17 @@ static void multipath_end_bh_io (struct 
 	struct bio *bio = mp_bh->master_bio;
 	multipath_conf_t *conf = mddev_to_conf(mp_bh->mddev);
 
-	bio_endio(bio, bio->bi_size, err);
+	bio_endio(bio, err);
 	mempool_free(mp_bh, conf->pool);
 }
 
-static int multipath_end_request(struct bio *bio, unsigned int bytes_done,
-				 int error)
+static void multipath_end_request(struct bio *bio, int error)
 {
 	int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	struct multipath_bh * mp_bh = (struct multipath_bh *)(bio->bi_private);
 	multipath_conf_t *conf = mddev_to_conf(mp_bh->mddev);
 	mdk_rdev_t *rdev = conf->multipaths[mp_bh->path].rdev;
 
-	if (bio->bi_size)
-		return 1;
-
 	if (uptodate)
 		multipath_end_bh_io(mp_bh, 0);
 	else if (!bio_rw_ahead(bio)) {
@@ -112,7 +108,6 @@ static int multipath_end_request(struct 
 	} else
 		multipath_end_bh_io(mp_bh, error);
 	rdev_dec_pending(rdev, conf->mddev);
-	return 0;
 }
 
 static void unplug_slaves(mddev_t *mddev)
@@ -155,7 +150,7 @@ static int multipath_make_request (struc
 	const int rw = bio_data_dir(bio);
 
 	if (unlikely(bio_barrier(bio))) {
-		bio_endio(bio, bio->bi_size, -EOPNOTSUPP);
+		bio_endio(bio, -EOPNOTSUPP);
 		return 0;
 	}
 
@@ -169,7 +164,7 @@ static int multipath_make_request (struc
 
 	mp_bh->path = multipath_map(conf);
 	if (mp_bh->path < 0) {
-		bio_endio(bio, bio->bi_size, -EIO);
+		bio_endio(bio, -EIO);
 		mempool_free(mp_bh, conf->pool);
 		return 0;
 	}

diff .prev/drivers/md/raid0.c ./drivers/md/raid0.c
--- .prev/drivers/md/raid0.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/raid0.c	2007-07-31 11:20:51.000000000 +1000
@@ -420,7 +420,7 @@ static int raid0_make_request (struct re
 	const int rw = bio_data_dir(bio);
 
 	if (unlikely(bio_barrier(bio))) {
-		bio_endio(bio, bio->bi_size, -EOPNOTSUPP);
+		bio_endio(bio, -EOPNOTSUPP);
 		return 0;
 	}
 
@@ -490,7 +490,7 @@ bad_map:
 		" or bigger than %dk %llu %d\n", chunk_size, 
 		(unsigned long long)bio->bi_sector, bio->bi_size >> 10);
 
-	bio_io_error(bio, bio->bi_size);
+	bio_io_error(bio);
 	return 0;
 }
 			   

diff .prev/drivers/md/raid10.c ./drivers/md/raid10.c
--- .prev/drivers/md/raid10.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/raid10.c	2007-07-31 11:20:51.000000000 +1000
@@ -227,7 +227,7 @@ static void raid_end_bio_io(r10bio_t *r1
 {
 	struct bio *bio = r10_bio->master_bio;
 
-	bio_endio(bio, bio->bi_size,
+	bio_endio(bio,
 		test_bit(R10BIO_Uptodate, &r10_bio->state) ? 0 : -EIO);
 	free_r10bio(r10_bio);
 }
@@ -243,15 +243,13 @@ static inline void update_head_pos(int s
 		r10_bio->devs[slot].addr + (r10_bio->sectors);
 }
 
-static int raid10_end_read_request(struct bio *bio, unsigned int bytes_done, int error)
+static void raid10_end_read_request(struct bio *bio, int error)
 {
 	int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	r10bio_t * r10_bio = (r10bio_t *)(bio->bi_private);
 	int slot, dev;
 	conf_t *conf = mddev_to_conf(r10_bio->mddev);
 
-	if (bio->bi_size)
-		return 1;
 
 	slot = r10_bio->read_slot;
 	dev = r10_bio->devs[slot].devnum;
@@ -284,19 +282,15 @@ static int raid10_end_read_request(struc
 	}
 
 	rdev_dec_pending(conf->mirrors[dev].rdev, conf->mddev);
-	return 0;
 }
 
-static int raid10_end_write_request(struct bio *bio, unsigned int bytes_done, int error)
+static void raid10_end_write_request(struct bio *bio, int error)
 {
 	int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	r10bio_t * r10_bio = (r10bio_t *)(bio->bi_private);
 	int slot, dev;
 	conf_t *conf = mddev_to_conf(r10_bio->mddev);
 
-	if (bio->bi_size)
-		return 1;
-
 	for (slot = 0; slot < conf->copies; slot++)
 		if (r10_bio->devs[slot].bio == bio)
 			break;
@@ -339,7 +333,6 @@ static int raid10_end_write_request(stru
 	}
 
 	rdev_dec_pending(conf->mirrors[dev].rdev, conf->mddev);
-	return 0;
 }
 
 
@@ -787,7 +780,7 @@ static int make_request(struct request_q
 	unsigned long flags;
 
 	if (unlikely(bio_barrier(bio))) {
-		bio_endio(bio, bio->bi_size, -EOPNOTSUPP);
+		bio_endio(bio, -EOPNOTSUPP);
 		return 0;
 	}
 
@@ -819,7 +812,7 @@ static int make_request(struct request_q
 		       " or bigger than %dk %llu %d\n", chunk_sects/2,
 		       (unsigned long long)bio->bi_sector, bio->bi_size >> 10);
 
-		bio_io_error(bio, bio->bi_size);
+		bio_io_error(bio);
 		return 0;
 	}
 
@@ -1148,15 +1141,12 @@ abort:
 }
 
 
-static int end_sync_read(struct bio *bio, unsigned int bytes_done, int error)
+static void end_sync_read(struct bio *bio, int error)
 {
 	r10bio_t * r10_bio = (r10bio_t *)(bio->bi_private);
 	conf_t *conf = mddev_to_conf(r10_bio->mddev);
 	int i,d;
 
-	if (bio->bi_size)
-		return 1;
-
 	for (i=0; i<conf->copies; i++)
 		if (r10_bio->devs[i].bio == bio)
 			break;
@@ -1185,10 +1175,9 @@ static int end_sync_read(struct bio *bio
 		reschedule_retry(r10_bio);
 	}
 	rdev_dec_pending(conf->mirrors[d].rdev, conf->mddev);
-	return 0;
 }
 
-static int end_sync_write(struct bio *bio, unsigned int bytes_done, int error)
+static void end_sync_write(struct bio *bio, int error)
 {
 	int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	r10bio_t * r10_bio = (r10bio_t *)(bio->bi_private);
@@ -1196,9 +1185,6 @@ static int end_sync_write(struct bio *bi
 	conf_t *conf = mddev_to_conf(mddev);
 	int i,d;
 
-	if (bio->bi_size)
-		return 1;
-
 	for (i = 0; i < conf->copies; i++)
 		if (r10_bio->devs[i].bio == bio)
 			break;
@@ -1221,7 +1207,6 @@ static int end_sync_write(struct bio *bi
 		}
 	}
 	rdev_dec_pending(conf->mirrors[d].rdev, mddev);
-	return 0;
 }
 
 /*
@@ -1367,7 +1352,7 @@ static void recovery_request_write(mddev
 	if (test_bit(R10BIO_Uptodate, &r10_bio->state))
 		generic_make_request(wbio);
 	else
-		bio_endio(wbio, wbio->bi_size, -EIO);
+		bio_endio(wbio, -EIO);
 }
 
 

diff .prev/drivers/md/raid1.c ./drivers/md/raid1.c
--- .prev/drivers/md/raid1.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/raid1.c	2007-07-31 11:20:51.000000000 +1000
@@ -238,7 +238,7 @@ static void raid_end_bio_io(r1bio_t *r1_
 			(unsigned long long) bio->bi_sector +
 				(bio->bi_size >> 9) - 1);
 
-		bio_endio(bio, bio->bi_size,
+		bio_endio(bio,
 			test_bit(R1BIO_Uptodate, &r1_bio->state) ? 0 : -EIO);
 	}
 	free_r1bio(r1_bio);
@@ -255,16 +255,13 @@ static inline void update_head_pos(int d
 		r1_bio->sector + (r1_bio->sectors);
 }
 
-static int raid1_end_read_request(struct bio *bio, unsigned int bytes_done, int error)
+static void raid1_end_read_request(struct bio *bio, int error)
 {
 	int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	r1bio_t * r1_bio = (r1bio_t *)(bio->bi_private);
 	int mirror;
 	conf_t *conf = mddev_to_conf(r1_bio->mddev);
 
-	if (bio->bi_size)
-		return 1;
-	
 	mirror = r1_bio->read_disk;
 	/*
 	 * this branch is our 'one mirror IO has finished' event handler:
@@ -301,10 +298,9 @@ static int raid1_end_read_request(struct
 	}
 
 	rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev);
-	return 0;
 }
 
-static int raid1_end_write_request(struct bio *bio, unsigned int bytes_done, int error)
+static void raid1_end_write_request(struct bio *bio, int error)
 {
 	int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	r1bio_t * r1_bio = (r1bio_t *)(bio->bi_private);
@@ -312,8 +308,6 @@ static int raid1_end_write_request(struc
 	conf_t *conf = mddev_to_conf(r1_bio->mddev);
 	struct bio *to_put = NULL;
 
-	if (bio->bi_size)
-		return 1;
 
 	for (mirror = 0; mirror < conf->raid_disks; mirror++)
 		if (r1_bio->bios[mirror] == bio)
@@ -366,7 +360,7 @@ static int raid1_end_write_request(struc
 					       (unsigned long long) mbio->bi_sector,
 					       (unsigned long long) mbio->bi_sector +
 					       (mbio->bi_size >> 9) - 1);
-					bio_endio(mbio, mbio->bi_size, 0);
+					bio_endio(mbio, 0);
 				}
 			}
 		}
@@ -400,8 +394,6 @@ static int raid1_end_write_request(struc
 
 	if (to_put)
 		bio_put(to_put);
-
-	return 0;
 }
 
 
@@ -796,7 +788,7 @@ static int make_request(struct request_q
 	if (unlikely(!mddev->barriers_work && bio_barrier(bio))) {
 		if (rw == WRITE)
 			md_write_end(mddev);
-		bio_endio(bio, bio->bi_size, -EOPNOTSUPP);
+		bio_endio(bio, -EOPNOTSUPP);
 		return 0;
 	}
 
@@ -1137,14 +1129,11 @@ abort:
 }
 
 
-static int end_sync_read(struct bio *bio, unsigned int bytes_done, int error)
+static void end_sync_read(struct bio *bio, int error)
 {
 	r1bio_t * r1_bio = (r1bio_t *)(bio->bi_private);
 	int i;
 
-	if (bio->bi_size)
-		return 1;
-
 	for (i=r1_bio->mddev->raid_disks; i--; )
 		if (r1_bio->bios[i] == bio)
 			break;
@@ -1160,10 +1149,9 @@ static int end_sync_read(struct bio *bio
 
 	if (atomic_dec_and_test(&r1_bio->remaining))
 		reschedule_retry(r1_bio);
-	return 0;
 }
 
-static int end_sync_write(struct bio *bio, unsigned int bytes_done, int error)
+static void end_sync_write(struct bio *bio, int error)
 {
 	int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	r1bio_t * r1_bio = (r1bio_t *)(bio->bi_private);
@@ -1172,9 +1160,6 @@ static int end_sync_write(struct bio *bi
 	int i;
 	int mirror=0;
 
-	if (bio->bi_size)
-		return 1;
-
 	for (i = 0; i < conf->raid_disks; i++)
 		if (r1_bio->bios[i] == bio) {
 			mirror = i;
@@ -1200,7 +1185,6 @@ static int end_sync_write(struct bio *bi
 		md_done_sync(mddev, r1_bio->sectors, uptodate);
 		put_buf(r1_bio);
 	}
-	return 0;
 }
 
 static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio)

diff .prev/drivers/md/raid5.c ./drivers/md/raid5.c
--- .prev/drivers/md/raid5.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/md/raid5.c	2007-07-31 11:20:51.000000000 +1000
@@ -111,12 +111,11 @@ static void return_io(struct bio *return
 {
 	struct bio *bi = return_bi;
 	while (bi) {
-		int bytes = bi->bi_size;
 
 		return_bi = bi->bi_next;
 		bi->bi_next = NULL;
 		bi->bi_size = 0;
-		bi->bi_end_io(bi, bytes,
+		bi->bi_end_io(bi,
 			      test_bit(BIO_UPTODATE, &bi->bi_flags)
 			        ? 0 : -EIO);
 		bi = return_bi;
@@ -686,10 +685,10 @@ static unsigned long get_stripe_work(str
 	return pending;
 }
 
-static int
-raid5_end_read_request(struct bio *bi, unsigned int bytes_done, int error);
-static int
-raid5_end_write_request (struct bio *bi, unsigned int bytes_done, int error);
+static void
+raid5_end_read_request(struct bio *bi, int error);
+static void
+raid5_end_write_request(struct bio *bi, int error);
 
 static void ops_run_io(struct stripe_head *sh)
 {
@@ -1605,8 +1604,7 @@ static void shrink_stripes(raid5_conf_t 
 	conf->sq_slab_cache = NULL;
 }
 
-static int raid5_end_read_request(struct bio * bi, unsigned int bytes_done,
-				   int error)
+static void raid5_end_read_request(struct bio *bi, int error)
 {
  	struct stripe_head *sh = bi->bi_private;
 	raid5_conf_t *conf = sh->sq->raid_conf;
@@ -1615,8 +1613,6 @@ static int raid5_end_read_request(struct
 	char b[BDEVNAME_SIZE];
 	mdk_rdev_t *rdev;
 
-	if (bi->bi_size)
-		return 1;
 
 	for (i=0 ; i<disks; i++)
 		if (bi == &sh->dev[i].req)
@@ -1627,7 +1623,7 @@ static int raid5_end_read_request(struct
 		uptodate);
 	if (i == disks) {
 		BUG();
-		return 0;
+		return;
 	}
 
 	if (uptodate) {
@@ -1680,11 +1676,9 @@ static int raid5_end_read_request(struct
 	clear_bit(R5_LOCKED, &sh->dev[i].flags);
 	set_bit(STRIPE_HANDLE, &sh->state);
 	release_stripe(sh);
-	return 0;
 }
 
-static int raid5_end_write_request (struct bio *bi, unsigned int bytes_done,
-				    int error)
+static void raid5_end_write_request(struct bio *bi, int error)
 {
  	struct stripe_head *sh = bi->bi_private;
 	struct stripe_queue *sq = sh->sq;
@@ -1692,9 +1686,6 @@ static int raid5_end_write_request (stru
 	int disks = sh->disks, i;
 	int uptodate = test_bit(BIO_UPTODATE, &bi->bi_flags);
 
-	if (bi->bi_size)
-		return 1;
-
 	for (i=0 ; i<disks; i++)
 		if (bi == &sh->dev[i].req)
 			break;
@@ -1704,7 +1695,7 @@ static int raid5_end_write_request (stru
 		uptodate);
 	if (i == disks) {
 		BUG();
-		return 0;
+		return;
 	}
 
 	if (!uptodate)
@@ -1715,7 +1706,6 @@ static int raid5_end_write_request (stru
 	clear_bit(R5_LOCKED, &sh->dev[i].flags);
 	set_bit(STRIPE_HANDLE, &sh->state);
 	release_stripe(sh);
-	return 0;
 }
 
 static void raid5_build_block (struct stripe_head *sh, int i)
@@ -3894,7 +3884,7 @@ static struct bio *remove_bio_from_retry
  *  first).
  *  If the read failed..
  */
-static int raid5_align_endio(struct bio *bi, unsigned int bytes, int error)
+static void raid5_align_endio(struct bio *bi, int error)
 {
 	struct bio* raid_bi  = bi->bi_private;
 	mddev_t *mddev;
@@ -3902,8 +3892,6 @@ static int raid5_align_endio(struct bio 
 	int uptodate = test_bit(BIO_UPTODATE, &bi->bi_flags);
 	mdk_rdev_t *rdev;
 
-	if (bi->bi_size)
-		return 1;
 	bio_put(bi);
 
 	mddev = raid_bi->bi_bdev->bd_disk->queue->queuedata;
@@ -3914,17 +3902,16 @@ static int raid5_align_endio(struct bio 
 	rdev_dec_pending(rdev, conf->mddev);
 
 	if (!error && uptodate) {
-		bio_endio(raid_bi, bytes, 0);
+		bio_endio(raid_bi, 0);
 		if (atomic_dec_and_test(&conf->active_aligned_reads))
 			wake_up(&conf->wait_for_stripe);
-		return 0;
+		return;
 	}
 
 
 	pr_debug("raid5_align_endio : io error...handing IO for a retry\n");
 
 	add_bio_to_retry(raid_bi, conf);
-	return 0;
 }
 
 static int bio_fits_rdev(struct bio *bi)
@@ -4030,7 +4017,7 @@ static int make_request(struct request_q
 	int remaining;
 
 	if (unlikely(bio_barrier(bi))) {
-		bio_endio(bi, bi->bi_size, -EOPNOTSUPP);
+		bio_endio(bi, -EOPNOTSUPP);
 		return 0;
 	}
 
@@ -4148,12 +4135,11 @@ static int make_request(struct request_q
 	remaining = --bi->bi_phys_segments;
 	spin_unlock_irq(&conf->device_lock);
 	if (remaining == 0) {
-		int bytes = bi->bi_size;
 
 		if ( rw == WRITE )
 			md_write_end(mddev);
-		bi->bi_size = 0;
-		bi->bi_end_io(bi, bytes,
+
+		bi->bi_end_io(bi,
 			      test_bit(BIO_UPTODATE, &bi->bi_flags)
 			        ? 0 : -EIO);
 	}
@@ -4473,10 +4459,8 @@ static int  retry_aligned_read(raid5_con
 	remaining = --raid_bio->bi_phys_segments;
 	spin_unlock_irq(&conf->device_lock);
 	if (remaining == 0) {
-		int bytes = raid_bio->bi_size;
 
-		raid_bio->bi_size = 0;
-		raid_bio->bi_end_io(raid_bio, bytes,
+		raid_bio->bi_end_io(raid_bio,
 			      test_bit(BIO_UPTODATE, &raid_bio->bi_flags)
 			        ? 0 : -EIO);
 	}

diff .prev/drivers/s390/block/dcssblk.c ./drivers/s390/block/dcssblk.c
--- .prev/drivers/s390/block/dcssblk.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/s390/block/dcssblk.c	2007-07-31 11:20:51.000000000 +1000
@@ -674,10 +674,10 @@ dcssblk_make_request(struct request_queu
 		}
 		bytes_done += bvec->bv_len;
 	}
-	bio_endio(bio, bytes_done, 0);
+	bio_endio(bio, 0);
 	return 0;
 fail:
-	bio_io_error(bio, bio->bi_size);
+	bio_io_error(bio);
 	return 0;
 }
 

diff .prev/drivers/s390/block/xpram.c ./drivers/s390/block/xpram.c
--- .prev/drivers/s390/block/xpram.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/s390/block/xpram.c	2007-07-31 11:20:51.000000000 +1000
@@ -230,12 +230,10 @@ static int xpram_make_request(struct req
 		}
 	}
 	set_bit(BIO_UPTODATE, &bio->bi_flags);
-	bytes = bio->bi_size;
-	bio->bi_size = 0;
-	bio->bi_end_io(bio, bytes, 0);
+	bio_end_io(bio, 0);
 	return 0;
 fail:
-	bio_io_error(bio, bio->bi_size);
+	bio_io_error(bio);
 	return 0;
 }
 

diff .prev/drivers/scsi/scsi_lib.c ./drivers/scsi/scsi_lib.c
--- .prev/drivers/scsi/scsi_lib.c	2007-07-31 11:20:18.000000000 +1000
+++ ./drivers/scsi/scsi_lib.c	2007-07-31 11:20:51.000000000 +1000
@@ -275,13 +275,9 @@ static int scsi_merge_bio(struct request
 	return 0;
 }
 
-static int scsi_bi_endio(struct bio *bio, unsigned int bytes_done, int error)
+static void scsi_bi_endio(struct bio *bio, int error)
 {
-	if (bio->bi_size)
-		return 1;
-
 	bio_put(bio);
-	return 0;
 }
 
 /**
@@ -337,7 +333,7 @@ static int scsi_req_map_sg(struct reques
 			if (bio->bi_vcnt >= nr_vecs) {
 				err = scsi_merge_bio(rq, bio);
 				if (err) {
-					bio_endio(bio, bio->bi_size, 0);
+					bio_endio(bio, 0);
 					goto free_bios;
 				}
 				bio = NULL;
@@ -359,7 +355,7 @@ free_bios:
 		/*
 		 * call endio instead of bio_put incase it was bounced
 		 */
-		bio_endio(bio, bio->bi_size, 0);
+		bio_endio(bio, 0);
 	}
 
 	return err;

diff .prev/fs/bio.c ./fs/bio.c
--- .prev/fs/bio.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/bio.c	2007-07-31 11:20:51.000000000 +1000
@@ -798,13 +798,9 @@ void bio_unmap_user(struct bio *bio)
 	bio_put(bio);
 }
 
-static int bio_map_kern_endio(struct bio *bio, unsigned int bytes_done, int err)
+static void bio_map_kern_endio(struct bio *bio, int err)
 {
-	if (bio->bi_size)
-		return 1;
-
 	bio_put(bio);
-	return 0;
 }
 
 
@@ -1002,34 +998,23 @@ void bio_check_pages_dirty(struct bio *b
 /**
  * bio_endio - end I/O on a bio
  * @bio:	bio
- * @bytes_done:	number of bytes completed
  * @error:	error, if any
  *
  * Description:
- *   bio_endio() will end I/O on @bytes_done number of bytes. This may be
- *   just a partial part of the bio, or it may be the whole bio. bio_endio()
- *   is the preferred way to end I/O on a bio, it takes care of decrementing
- *   bi_size and clearing BIO_UPTODATE on error. @error is 0 on success, and
+ *   bio_endio() will end I/O on the whole bio. bio_endio()
+ *   is the preferred way to end I/O on a bio, it takes care of
+ *   clearing BIO_UPTODATE on error. @error is 0 on success, and
  *   and one of the established -Exxxx (-EIO, for instance) error values in
  *   case something went wrong. Noone should call bi_end_io() directly on
  *   a bio unless they own it and thus know that it has an end_io function.
  **/
-void bio_endio(struct bio *bio, unsigned int bytes_done, int error)
+void bio_endio(struct bio *bio, int error)
 {
 	if (error)
 		clear_bit(BIO_UPTODATE, &bio->bi_flags);
 
-	if (unlikely(bytes_done > bio->bi_size)) {
-		printk("%s: want %u bytes done, only %u left\n", __FUNCTION__,
-						bytes_done, bio->bi_size);
-		bytes_done = bio->bi_size;
-	}
-
-	bio->bi_size -= bytes_done;
-	bio->bi_sector += (bytes_done >> 9);
-
 	if (bio->bi_end_io)
-		bio->bi_end_io(bio, bytes_done, error);
+		bio->bi_end_io(bio, error);
 }
 
 void bio_pair_release(struct bio_pair *bp)
@@ -1037,37 +1022,29 @@ void bio_pair_release(struct bio_pair *b
 	if (atomic_dec_and_test(&bp->cnt)) {
 		struct bio *master = bp->bio1.bi_private;
 
-		bio_endio(master, master->bi_size, bp->error);
+		bio_endio(master, bp->error);
 		mempool_free(bp, bp->bio2.bi_private);
 	}
 }
 
-static int bio_pair_end_1(struct bio * bi, unsigned int done, int err)
+static void bio_pair_end_1(struct bio *bi, int err)
 {
 	struct bio_pair *bp = container_of(bi, struct bio_pair, bio1);
 
 	if (err)
 		bp->error = err;
 
-	if (bi->bi_size)
-		return 1;
-
 	bio_pair_release(bp);
-	return 0;
 }
 
-static int bio_pair_end_2(struct bio * bi, unsigned int done, int err)
+static void bio_pair_end_2(struct bio *bi, int err)
 {
 	struct bio_pair *bp = container_of(bi, struct bio_pair, bio2);
 
 	if (err)
 		bp->error = err;
 
-	if (bi->bi_size)
-		return 1;
-
 	bio_pair_release(bp);
-	return 0;
 }
 
 /*

diff .prev/fs/block_dev.c ./fs/block_dev.c
--- .prev/fs/block_dev.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/block_dev.c	2007-07-31 11:20:51.000000000 +1000
@@ -174,7 +174,7 @@ blkdev_direct_IO(int rw, struct kiocb *i
 }
 
 #if 0
-static int blk_end_aio(struct bio *bio, unsigned int bytes_done, int error)
+static void blk_end_aio(struct bio *bio, int error)
 {
 	struct kiocb *iocb = bio->bi_private;
 	atomic_t *bio_count = &iocb->ki_bio_count;

diff .prev/fs/buffer.c ./fs/buffer.c
--- .prev/fs/buffer.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/buffer.c	2007-07-31 11:20:51.000000000 +1000
@@ -2757,13 +2757,10 @@ sector_t generic_block_bmap(struct addre
 	return tmp.b_blocknr;
 }
 
-static int end_bio_bh_io_sync(struct bio *bio, unsigned int bytes_done, int err)
+static void end_bio_bh_io_sync(struct bio *bio, int err)
 {
 	struct buffer_head *bh = bio->bi_private;
 
-	if (bio->bi_size)
-		return 1;
-
 	if (err == -EOPNOTSUPP) {
 		set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
 		set_bit(BH_Eopnotsupp, &bh->b_state);
@@ -2771,7 +2768,6 @@ static int end_bio_bh_io_sync(struct bio
 
 	bh->b_end_io(bh, test_bit(BIO_UPTODATE, &bio->bi_flags));
 	bio_put(bio);
-	return 0;
 }
 
 int submit_bh(int rw, struct buffer_head * bh)

diff .prev/fs/direct-io.c ./fs/direct-io.c
--- .prev/fs/direct-io.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/direct-io.c	2007-07-31 11:20:51.000000000 +1000
@@ -264,15 +264,12 @@ static int dio_bio_complete(struct dio *
 /*
  * Asynchronous IO callback. 
  */
-static int dio_bio_end_aio(struct bio *bio, unsigned int bytes_done, int error)
+static void dio_bio_end_aio(struct bio *bio, int error)
 {
 	struct dio *dio = bio->bi_private;
 	unsigned long remaining;
 	unsigned long flags;
 
-	if (bio->bi_size)
-		return 1;
-
 	/* cleanup the bio */
 	dio_bio_complete(dio, bio);
 
@@ -287,8 +284,6 @@ static int dio_bio_end_aio(struct bio *b
 		aio_complete(dio->iocb, ret, 0);
 		kfree(dio);
 	}
-
-	return 0;
 }
 
 /*
@@ -298,21 +293,17 @@ static int dio_bio_end_aio(struct bio *b
  * During I/O bi_private points at the dio.  After I/O, bi_private is used to
  * implement a singly-linked list of completed BIOs, at dio->bio_list.
  */
-static int dio_bio_end_io(struct bio *bio, unsigned int bytes_done, int error)
+static void dio_bio_end_io(struct bio *bio, int error)
 {
 	struct dio *dio = bio->bi_private;
 	unsigned long flags;
 
-	if (bio->bi_size)
-		return 1;
-
 	spin_lock_irqsave(&dio->bio_lock, flags);
 	bio->bi_private = dio->bio_list;
 	dio->bio_list = bio;
 	if (--dio->refcount == 1 && dio->waiter)
 		wake_up_process(dio->waiter);
 	spin_unlock_irqrestore(&dio->bio_lock, flags);
-	return 0;
 }
 
 static int

diff .prev/fs/ext4/writeback.c ./fs/ext4/writeback.c
--- .prev/fs/ext4/writeback.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/ext4/writeback.c	2007-07-31 11:20:51.000000000 +1000
@@ -144,14 +144,11 @@ static struct bio *ext4_wb_bio_alloc(str
 	return bio;
 }
 
-static int ext4_wb_end_io(struct bio *bio, unsigned int bytes, int err)
+static void ext4_wb_end_io(struct bio *bio, int err)
 {
 	const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
 
-	if (bio->bi_size)
-		return 1;
-
 	do {
 		struct page *page = bvec->bv_page;
 

diff .prev/fs/gfs2/super.c ./fs/gfs2/super.c
--- .prev/fs/gfs2/super.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/gfs2/super.c	2007-07-31 11:20:51.000000000 +1000
@@ -160,11 +160,9 @@ int gfs2_check_sb(struct gfs2_sbd *sdp, 
 }
 
 
-static int end_bio_io_page(struct bio *bio, unsigned int bytes_done, int error)
+static void end_bio_io_page(struct bio *bio, int error)
 {
 	struct page *page = bio->bi_private;
-	if (bio->bi_size)
-		return 1;
 
 	if (!error)
 		SetPageUptodate(page);

diff .prev/fs/jfs/jfs_logmgr.c ./fs/jfs/jfs_logmgr.c
--- .prev/fs/jfs/jfs_logmgr.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/jfs/jfs_logmgr.c	2007-07-31 11:20:51.000000000 +1000
@@ -2200,16 +2200,13 @@ static int lbmIOWait(struct lbuf * bp, i
  *
  * executed at INTIODONE level
  */
-static int lbmIODone(struct bio *bio, unsigned int bytes_done, int error)
+static void lbmIODone(struct bio *bio, int error)
 {
 	struct lbuf *bp = bio->bi_private;
 	struct lbuf *nextbp, *tail;
 	struct jfs_log *log;
 	unsigned long flags;
 
-	if (bio->bi_size)
-		return 1;
-
 	/*
 	 * get back jfs buffer bound to the i/o buffer
 	 */

diff .prev/fs/jfs/jfs_metapage.c ./fs/jfs/jfs_metapage.c
--- .prev/fs/jfs/jfs_metapage.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/jfs/jfs_metapage.c	2007-07-31 11:20:51.000000000 +1000
@@ -280,14 +280,10 @@ static void last_read_complete(struct pa
 	unlock_page(page);
 }
 
-static int metapage_read_end_io(struct bio *bio, unsigned int bytes_done,
-				int err)
+static void metapage_read_end_io(struct bio *bio, int err)
 {
 	struct page *page = bio->bi_private;
 
-	if (bio->bi_size)
-		return 1;
-
 	if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) {
 		printk(KERN_ERR "metapage_read_end_io: I/O error\n");
 		SetPageError(page);
@@ -341,16 +337,12 @@ static void last_write_complete(struct p
 	end_page_writeback(page);
 }
 
-static int metapage_write_end_io(struct bio *bio, unsigned int bytes_done,
-				 int err)
+static void metapage_write_end_io(struct bio *bio, int err)
 {
 	struct page *page = bio->bi_private;
 
 	BUG_ON(!PagePrivate(page));
 
-	if (bio->bi_size)
-		return 1;
-
 	if (! test_bit(BIO_UPTODATE, &bio->bi_flags)) {
 		printk(KERN_ERR "metapage_write_end_io: I/O error\n");
 		SetPageError(page);

diff .prev/fs/mpage.c ./fs/mpage.c
--- .prev/fs/mpage.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/mpage.c	2007-07-31 11:20:51.000000000 +1000
@@ -39,14 +39,11 @@
  * status of that page is hard.  See end_buffer_async_read() for the details.
  * There is no point in duplicating all that complexity.
  */
-static int mpage_end_io_read(struct bio *bio, unsigned int bytes_done, int err)
+static void mpage_end_io_read(struct bio *bio, int err)
 {
 	const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
 
-	if (bio->bi_size)
-		return 1;
-
 	do {
 		struct page *page = bvec->bv_page;
 
@@ -62,17 +59,13 @@ static int mpage_end_io_read(struct bio 
 		unlock_page(page);
 	} while (bvec >= bio->bi_io_vec);
 	bio_put(bio);
-	return 0;
 }
 
-static int mpage_end_io_write(struct bio *bio, unsigned int bytes_done, int err)
+static void mpage_end_io_write(struct bio *bio, int err)
 {
 	const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
 
-	if (bio->bi_size)
-		return 1;
-
 	do {
 		struct page *page = bvec->bv_page;
 
@@ -87,7 +80,6 @@ static int mpage_end_io_write(struct bio
 		end_page_writeback(page);
 	} while (bvec >= bio->bi_io_vec);
 	bio_put(bio);
-	return 0;
 }
 
 static struct bio *mpage_bio_submit(int rw, struct bio *bio)

diff .prev/fs/ocfs2/cluster/heartbeat.c ./fs/ocfs2/cluster/heartbeat.c
--- .prev/fs/ocfs2/cluster/heartbeat.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/ocfs2/cluster/heartbeat.c	2007-07-31 11:20:51.000000000 +1000
@@ -217,7 +217,6 @@ static void o2hb_wait_on_io(struct o2hb_
 }
 
 static int o2hb_bio_end_io(struct bio *bio,
-			   unsigned int bytes_done,
 			   int error)
 {
 	struct o2hb_bio_wait_ctxt *wc = bio->bi_private;
@@ -227,9 +226,6 @@ static int o2hb_bio_end_io(struct bio *b
 		wc->wc_error = error;
 	}
 
-	if (bio->bi_size)
-		return 1;
-
 	o2hb_bio_wait_dec(wc, 1);
 	bio_put(bio);
 	return 0;

diff .prev/fs/reiser4/flush_queue.c ./fs/reiser4/flush_queue.c
--- .prev/fs/reiser4/flush_queue.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/reiser4/flush_queue.c	2007-07-31 11:20:51.000000000 +1000
@@ -392,8 +392,7 @@ int atom_fq_parts_are_clean(txn_atom * a
 #endif
 /* Bio i/o completion routine for reiser4 write operations. */
 static int
-end_io_handler(struct bio *bio, unsigned int bytes_done UNUSED_ARG,
-	       int err)
+end_io_handler(struct bio *bio, int err)
 {
 	int i;
 	int nr_errors = 0;
@@ -401,10 +400,6 @@ end_io_handler(struct bio *bio, unsigned
 
 	assert("zam-958", bio->bi_rw & WRITE);
 
-	/* i/o op. is not fully completed */
-	if (bio->bi_size != 0)
-		return 1;
-
 	if (err == -EOPNOTSUPP)
 		set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
 

diff .prev/fs/reiser4/page_cache.c ./fs/reiser4/page_cache.c
--- .prev/fs/reiser4/page_cache.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/reiser4/page_cache.c	2007-07-31 11:20:51.000000000 +1000
@@ -321,17 +321,10 @@ reiser4_tree *reiser4_tree_by_page(const
 
 */
 static int
-end_bio_single_page_read(struct bio *bio, unsigned int bytes_done UNUSED_ARG,
-			 int err UNUSED_ARG)
+end_bio_single_page_read(struct bio *bio, int err UNUSED_ARG)
 {
 	struct page *page;
 
-	if (bio->bi_size != 0) {
-		warning("nikita-3332", "Truncated single page read: %i",
-			bio->bi_size);
-		return 1;
-	}
-
 	page = bio->bi_io_vec[0].bv_page;
 
 	if (test_bit(BIO_UPTODATE, &bio->bi_flags)) {
@@ -351,17 +344,10 @@ end_bio_single_page_read(struct bio *bio
 
 */
 static int
-end_bio_single_page_write(struct bio *bio, unsigned int bytes_done UNUSED_ARG,
-			  int err UNUSED_ARG)
+end_bio_single_page_write(struct bio *bio, int err UNUSED_ARG)
 {
 	struct page *page;
 
-	if (bio->bi_size != 0) {
-		warning("nikita-3333", "Truncated single page write: %i",
-			bio->bi_size);
-		return 1;
-	}
-
 	page = bio->bi_io_vec[0].bv_page;
 
 	if (!test_bit(BIO_UPTODATE, &bio->bi_flags))

diff .prev/fs/reiser4/status_flags.c ./fs/reiser4/status_flags.c
--- .prev/fs/reiser4/status_flags.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/reiser4/status_flags.c	2007-07-31 11:20:51.000000000 +1000
@@ -15,11 +15,8 @@
 /* This is our end I/O handler that marks page uptodate if IO was successful. It also
    unconditionally unlocks the page, so we can see that io was done.
    We do not free bio, because we hope to reuse that. */
-static int reiser4_status_endio(struct bio *bio, unsigned int bytes_done,
-				int err)
+static void reiser4_status_endio(struct bio *bio, int err)
 {
-	if (bio->bi_size)
-		return 1;
 
 	if (test_bit(BIO_UPTODATE, &bio->bi_flags)) {
 		SetPageUptodate(bio->bi_io_vec->bv_page);

diff .prev/fs/xfs/linux-2.6/xfs_aops.c ./fs/xfs/linux-2.6/xfs_aops.c
--- .prev/fs/xfs/linux-2.6/xfs_aops.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/xfs/linux-2.6/xfs_aops.c	2007-07-31 11:20:51.000000000 +1000
@@ -325,14 +325,10 @@ xfs_iomap_valid(
 STATIC int
 xfs_end_bio(
 	struct bio		*bio,
-	unsigned int		bytes_done,
 	int			error)
 {
 	xfs_ioend_t		*ioend = bio->bi_private;
 
-	if (bio->bi_size)
-		return 1;
-
 	ASSERT(atomic_read(&bio->bi_cnt) >= 1);
 	ioend->io_error = test_bit(BIO_UPTODATE, &bio->bi_flags) ? 0 : error;
 

diff .prev/fs/xfs/linux-2.6/xfs_buf.c ./fs/xfs/linux-2.6/xfs_buf.c
--- .prev/fs/xfs/linux-2.6/xfs_buf.c	2007-07-31 11:20:18.000000000 +1000
+++ ./fs/xfs/linux-2.6/xfs_buf.c	2007-07-31 11:20:51.000000000 +1000
@@ -1106,16 +1106,12 @@ _xfs_buf_ioend(
 STATIC int
 xfs_buf_bio_end_io(
 	struct bio		*bio,
-	unsigned int		bytes_done,
 	int			error)
 {
 	xfs_buf_t		*bp = (xfs_buf_t *)bio->bi_private;
 	unsigned int		blocksize = bp->b_target->bt_bsize;
 	struct bio_vec		*bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
 
-	if (bio->bi_size)
-		return 1;
-
 	if (!test_bit(BIO_UPTODATE, &bio->bi_flags))
 		bp->b_error = EIO;
 

diff .prev/include/linux/bio.h ./include/linux/bio.h
--- .prev/include/linux/bio.h	2007-07-31 11:20:43.000000000 +1000
+++ ./include/linux/bio.h	2007-07-31 11:20:51.000000000 +1000
@@ -62,7 +62,7 @@ struct bio_vec {
 
 struct bio_set;
 struct bio;
-typedef int (bio_end_io_t) (struct bio *, unsigned int, int);
+typedef void (bio_end_io_t) (struct bio *, int);
 typedef void (bio_destructor_t) (struct bio *);
 
 /*
@@ -221,7 +221,7 @@ struct bio {
 #define BIO_SEG_BOUNDARY(q, b1, b2) \
 	BIOVEC_SEG_BOUNDARY((q), __BVEC_END((b1)), __BVEC_START((b2)))
 
-#define bio_io_error(bio, bytes) bio_endio((bio), (bytes), -EIO)
+#define bio_io_error(bio) bio_endio((bio), -EIO)
 
 /*
  * drivers should not use the __ version unless they _really_ want to
@@ -281,7 +281,7 @@ extern struct bio *bio_alloc_bioset(gfp_
 extern void bio_put(struct bio *);
 extern void bio_free(struct bio *, struct bio_set *);
 
-extern void bio_endio(struct bio *, unsigned int, int);
+extern void bio_endio(struct bio *, int);
 struct request_queue;
 extern int bio_phys_segments(struct request_queue *, struct bio *);
 extern int bio_hw_segments(struct request_queue *, struct bio *);

diff .prev/include/linux/swap.h ./include/linux/swap.h
--- .prev/include/linux/swap.h	2007-07-31 11:20:18.000000000 +1000
+++ ./include/linux/swap.h	2007-07-31 11:20:51.000000000 +1000
@@ -222,7 +222,7 @@ extern void swap_unplug_io_fn(struct bac
 /* linux/mm/page_io.c */
 extern int swap_readpage(struct file *, struct page *);
 extern int swap_writepage(struct page *page, struct writeback_control *wbc);
-extern int end_swap_bio_read(struct bio *bio, unsigned int bytes_done, int err);
+extern void end_swap_bio_read(struct bio *bio, int err);
 
 /* linux/mm/swap_state.c */
 extern struct address_space swapper_space;

diff .prev/mm/bounce.c ./mm/bounce.c
--- .prev/mm/bounce.c	2007-07-31 11:20:18.000000000 +1000
+++ ./mm/bounce.c	2007-07-31 11:20:51.000000000 +1000
@@ -140,26 +140,19 @@ static void bounce_end_io(struct bio *bi
 		mempool_free(bvec->bv_page, pool);
 	}
 
-	bio_endio(bio_orig, bio_orig->bi_size, err);
+	bio_endio(bio_orig, err);
 	bio_put(bio);
 }
 
-static int bounce_end_io_write(struct bio *bio, unsigned int bytes_done, int err)
+static void bounce_end_io_write(struct bio *bio, int err)
 {
-	if (bio->bi_size)
-		return 1;
-
 	bounce_end_io(bio, page_pool, err);
-	return 0;
 }
 
-static int bounce_end_io_write_isa(struct bio *bio, unsigned int bytes_done, int err)
+static void bounce_end_io_write_isa(struct bio *bio, int err)
 {
-	if (bio->bi_size)
-		return 1;
 
 	bounce_end_io(bio, isa_page_pool, err);
-	return 0;
 }
 
 static void __bounce_end_io_read(struct bio *bio, mempool_t *pool, int err)
@@ -172,22 +165,14 @@ static void __bounce_end_io_read(struct 
 	bounce_end_io(bio, pool, err);
 }
 
-static int bounce_end_io_read(struct bio *bio, unsigned int bytes_done, int err)
+static void bounce_end_io_read(struct bio *bio, int err)
 {
-	if (bio->bi_size)
-		return 1;
-
 	__bounce_end_io_read(bio, page_pool, err);
-	return 0;
 }
 
-static int bounce_end_io_read_isa(struct bio *bio, unsigned int bytes_done, int err)
+static void bounce_end_io_read_isa(struct bio *bio, int err)
 {
-	if (bio->bi_size)
-		return 1;
-
 	__bounce_end_io_read(bio, isa_page_pool, err);
-	return 0;
 }
 
 static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,

diff .prev/mm/page_io.c ./mm/page_io.c
--- .prev/mm/page_io.c	2007-07-31 11:20:18.000000000 +1000
+++ ./mm/page_io.c	2007-07-31 11:20:51.000000000 +1000
@@ -45,14 +45,11 @@ static struct bio *get_swap_bio(gfp_t gf
 	return bio;
 }
 
-static int end_swap_bio_write(struct bio *bio, unsigned int bytes_done, int err)
+static void end_swap_bio_write(struct bio *bio, int err)
 {
 	const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	struct page *page = bio->bi_io_vec[0].bv_page;
 
-	if (bio->bi_size)
-		return 1;
-
 	if (!uptodate) {
 		SetPageError(page);
 		/*
@@ -72,17 +69,13 @@ static int end_swap_bio_write(struct bio
 	}
 	end_page_writeback(page);
 	bio_put(bio);
-	return 0;
 }
 
-int end_swap_bio_read(struct bio *bio, unsigned int bytes_done, int err)
+void end_swap_bio_read(struct bio *bio, int err)
 {
 	const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
 	struct page *page = bio->bi_io_vec[0].bv_page;
 
-	if (bio->bi_size)
-		return 1;
-
 	if (!uptodate) {
 		SetPageError(page);
 		ClearPageUptodate(page);
@@ -95,7 +88,6 @@ int end_swap_bio_read(struct bio *bio, u
 	}
 	unlock_page(page);
 	bio_put(bio);
-	return 0;
 }
 
 /*