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Drop 'size' argument from bio_endio and bi_end_io

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As bi_end_io is only called once when the reqeust is complete,
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>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
NeilBrown
2007-09-27 12:47:43 +02:00
committed by Jens Axboe
parent 5bb23a688b
commit 6712ecf8f6
45 changed files with 132 additions and 328 deletions
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48
drivers/md/raid5.c
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@@ -108,12 +108,11 @@ static void return_io(struct bio *return_bi)
{
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;
@@ -382,10 +381,10 @@ static unsigned long get_stripe_work(struct stripe_head *sh)
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)
{
@@ -1110,8 +1109,7 @@ static void shrink_stripes(raid5_conf_t *conf)
conf->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->raid_conf;
@@ -1120,8 +1118,6 @@ static int raid5_end_read_request(struct bio * bi, unsigned int bytes_done,
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)
@@ -1132,7 +1128,7 @@ static int raid5_end_read_request(struct bio * bi, unsigned int bytes_done,
uptodate);
if (i == disks) {
BUG();
return 0;
return;
}
if (uptodate) {
@@ -1185,20 +1181,15 @@ static int raid5_end_read_request(struct bio * bi, unsigned int bytes_done,
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;
raid5_conf_t *conf = sh->raid_conf;
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;
@@ -1208,7 +1199,7 @@ static int raid5_end_write_request (struct bio *bi, unsigned int bytes_done,
uptodate);
if (i == disks) {
BUG();
return 0;
return;
}
if (!uptodate)
@@ -1219,7 +1210,6 @@ static int raid5_end_write_request (struct bio *bi, unsigned int bytes_done,
clear_bit(R5_LOCKED, &sh->dev[i].flags);
set_bit(STRIPE_HANDLE, &sh->state);
release_stripe(sh);
return 0;
}
@@ -3340,7 +3330,7 @@ static struct bio *remove_bio_from_retry(raid5_conf_t *conf)
* 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;
@@ -3348,8 +3338,6 @@ static int raid5_align_endio(struct bio *bi, unsigned int bytes, int error)
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;
@@ -3360,17 +3348,16 @@ static int raid5_align_endio(struct bio *bi, unsigned int bytes, int error)
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)
@@ -3476,7 +3463,7 @@ static int make_request(struct request_queue *q, struct bio * bi)
int remaining;
if (unlikely(bio_barrier(bi))) {
bio_endio(bi, bi->bi_size, -EOPNOTSUPP);
bio_endio(bi, -EOPNOTSUPP);
return 0;
}
@@ -3592,12 +3579,11 @@ static int make_request(struct request_queue *q, struct bio * bi)
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);
}
@@ -3875,10 +3861,8 @@ static int retry_aligned_read(raid5_conf_t *conf, struct bio *raid_bio)
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);
}