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block: remove support for bio remapping from ->make_request

Browse source 
There is very little benefit in allowing to let a ->make_request
instance update the bios device and sector and loop around it in
__generic_make_request when we can archive the same through calling
generic_make_request from the driver and letting the loop in
generic_make_request handle it.

Note that various drivers got the return value from ->make_request and
returned non-zero values for errors.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Christoph Hellwig 2011-09-12 12:12:01 +02:00 • committed by Jens Axboe
commit 5a7bbad27a
25 changed files with 155 additions and 219 deletions
Download patch file Download diff file Expand all files Collapse all files

3
arch/m68k/emu/nfblock.c
View file

@ -59,7 +59,7 @@ struct nfhd_device {
struct gendisk *disk;
};
static int nfhd_make_request(struct request_queue *queue, struct bio *bio)
static void nfhd_make_request(struct request_queue *queue, struct bio *bio)
{
struct nfhd_device *dev = queue->queuedata;
struct bio_vec *bvec;
@ -76,7 +76,6 @@ static int nfhd_make_request(struct request_queue *queue, struct bio *bio)
sec += len;
}
bio_endio(bio, 0);
return 0;
}
static int nfhd_getgeo(struct block_device *bdev, struct hd_geometry *geo)

8
arch/powerpc/sysdev/axonram.c
View file

@ -104,7 +104,7 @@ axon_ram_irq_handler(int irq, void *dev)
* axon_ram_make_request - make_request() method for block device
* @queue, @bio: see blk_queue_make_request()
*/
static int
static void
axon_ram_make_request(struct request_queue *queue, struct bio *bio)
{
struct axon_ram_bank *bank = bio->bi_bdev->bd_disk->private_data;
@ -113,7 +113,6 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio)
struct bio_vec *vec;
unsigned int transfered;
unsigned short idx;
int rc = 0;
phys_mem = bank->io_addr + (bio->bi_sector << AXON_RAM_SECTOR_SHIFT);
phys_end = bank->io_addr + bank->size;
@ -121,8 +120,7 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio)
bio_for_each_segment(vec, bio, idx) {
if (unlikely(phys_mem + vec->bv_len > phys_end)) {
bio_io_error(bio);
rc = -ERANGE;
break;
return;
}
user_mem = page_address(vec->bv_page) + vec->bv_offset;
@ -135,8 +133,6 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio)
transfered += vec->bv_len;
}
bio_endio(bio, 0);
return rc;
}
/**

161
block/blk-core.c
View file

@ -1211,7 +1211,7 @@ void init_request_from_bio(struct request *req, struct bio *bio)
blk_rq_bio_prep(req->q, req, bio);
}
int blk_queue_bio(struct request_queue *q, struct bio *bio)
void blk_queue_bio(struct request_queue *q, struct bio *bio)
{
const bool sync = !!(bio->bi_rw & REQ_SYNC);
struct blk_plug *plug;
@ -1236,7 +1236,7 @@ int blk_queue_bio(struct request_queue *q, struct bio *bio)
* any locks.
*/
if (attempt_plug_merge(current, q, bio))
goto out;
return;
spin_lock_irq(q->queue_lock);
@ -1312,8 +1312,6 @@ get_rq:
out_unlock:
spin_unlock_irq(q->queue_lock);
}
out:
return 0;
}
EXPORT_SYMBOL_GPL(blk_queue_bio); /* for device mapper only */
@ -1441,112 +1439,85 @@ static inline int bio_check_eod(struct bio *bio, unsigned int nr_sectors)
static inline void __generic_make_request(struct bio *bio)
{
struct request_queue *q;
sector_t old_sector;
int ret, nr_sectors = bio_sectors(bio);
dev_t old_dev;
int nr_sectors = bio_sectors(bio);
int err = -EIO;
char b[BDEVNAME_SIZE];
struct hd_struct *part;
might_sleep();
if (bio_check_eod(bio, nr_sectors))
goto end_io;
q = bdev_get_queue(bio->bi_bdev);
if (unlikely(!q)) {
printk(KERN_ERR
"generic_make_request: Trying to access "
"nonexistent block-device %s (%Lu)\n",
bdevname(bio->bi_bdev, b),
(long long) bio->bi_sector);
goto end_io;
}
if (unlikely(!(bio->bi_rw & REQ_DISCARD) &&
nr_sectors > queue_max_hw_sectors(q))) {
printk(KERN_ERR "bio too big device %s (%u > %u)\n",
bdevname(bio->bi_bdev, b),
bio_sectors(bio),
queue_max_hw_sectors(q));
goto end_io;
}
if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
goto end_io;
part = bio->bi_bdev->bd_part;
if (should_fail_request(part, bio->bi_size) ||
should_fail_request(&part_to_disk(part)->part0,
bio->bi_size))
goto end_io;
/*
* Resolve the mapping until finished. (drivers are
* still free to implement/resolve their own stacking
* by explicitly returning 0)
*
* NOTE: we don't repeat the blk_size check for each new device.
* Stacking drivers are expected to know what they are doing.
* If this device has partitions, remap block n
* of partition p to block n+start(p) of the disk.
*/
old_sector = -1;
old_dev = 0;
do {
char b[BDEVNAME_SIZE];
struct hd_struct *part;
blk_partition_remap(bio);
q = bdev_get_queue(bio->bi_bdev);
if (unlikely(!q)) {
printk(KERN_ERR
"generic_make_request: Trying to access "
"nonexistent block-device %s (%Lu)\n",
bdevname(bio->bi_bdev, b),
(long long) bio->bi_sector);
if (bio_integrity_enabled(bio) && bio_integrity_prep(bio))
goto end_io;
if (bio_check_eod(bio, nr_sectors))
goto end_io;
/*
* Filter flush bio's early so that make_request based
* drivers without flush support don't have to worry
* about them.
*/
if ((bio->bi_rw & (REQ_FLUSH | REQ_FUA)) && !q->flush_flags) {
bio->bi_rw &= ~(REQ_FLUSH | REQ_FUA);
if (!nr_sectors) {
err = 0;
goto end_io;
}
}
if (unlikely(!(bio->bi_rw & REQ_DISCARD) &&
nr_sectors > queue_max_hw_sectors(q))) {
printk(KERN_ERR "bio too big device %s (%u > %u)\n",
bdevname(bio->bi_bdev, b),
bio_sectors(bio),
queue_max_hw_sectors(q));
goto end_io;
}
if ((bio->bi_rw & REQ_DISCARD) &&
(!blk_queue_discard(q) ||
((bio->bi_rw & REQ_SECURE) &&
!blk_queue_secdiscard(q)))) {
err = -EOPNOTSUPP;
goto end_io;
}
if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
goto end_io;
part = bio->bi_bdev->bd_part;
if (should_fail_request(part, bio->bi_size) ||
should_fail_request(&part_to_disk(part)->part0,
bio->bi_size))
goto end_io;
/*
* If this device has partitions, remap block n
* of partition p to block n+start(p) of the disk.
*/
blk_partition_remap(bio);
if (bio_integrity_enabled(bio) && bio_integrity_prep(bio))
goto end_io;
if (old_sector != -1)
trace_block_bio_remap(q, bio, old_dev, old_sector);
old_sector = bio->bi_sector;
old_dev = bio->bi_bdev->bd_dev;
if (bio_check_eod(bio, nr_sectors))
goto end_io;
/*
* Filter flush bio's early so that make_request based
* drivers without flush support don't have to worry
* about them.
*/
if ((bio->bi_rw & (REQ_FLUSH | REQ_FUA)) && !q->flush_flags) {
bio->bi_rw &= ~(REQ_FLUSH | REQ_FUA);
if (!nr_sectors) {
err = 0;
goto end_io;
}
}
if ((bio->bi_rw & REQ_DISCARD) &&
(!blk_queue_discard(q) ||
((bio->bi_rw & REQ_SECURE) &&
!blk_queue_secdiscard(q)))) {
err = -EOPNOTSUPP;
goto end_io;
}
if (blk_throtl_bio(q, &bio))
goto end_io;
/*
* If bio = NULL, bio has been throttled and will be submitted
* later.
*/
if (!bio)
break;
trace_block_bio_queue(q, bio);
ret = q->make_request_fn(q, bio);
} while (ret);
if (blk_throtl_bio(q, &bio))
goto end_io;
/* if bio = NULL, bio has been throttled and will be submitted later. */
if (!bio)
return;
trace_block_bio_queue(q, bio);
q->make_request_fn(q, bio);
return;
end_io:

14
drivers/block/aoe/aoeblk.c
View file

@ -159,7 +159,7 @@ aoeblk_release(struct gendisk *disk, fmode_t mode)
return 0;
}
static int
static void
aoeblk_make_request(struct request_queue *q, struct bio *bio)
{
struct sk_buff_head queue;
@ -172,25 +172,25 @@ aoeblk_make_request(struct request_queue *q, struct bio *bio)
if (bio == NULL) {
printk(KERN_ERR "aoe: bio is NULL\n");
BUG();
return 0;
return;
}
d = bio->bi_bdev->bd_disk->private_data;
if (d == NULL) {
printk(KERN_ERR "aoe: bd_disk->private_data is NULL\n");
BUG();
bio_endio(bio, -ENXIO);
return 0;
return;
} else if (bio->bi_io_vec == NULL) {
printk(KERN_ERR "aoe: bi_io_vec is NULL\n");
BUG();
bio_endio(bio, -ENXIO);
return 0;
return;
}
buf = mempool_alloc(d->bufpool, GFP_NOIO);
if (buf == NULL) {
printk(KERN_INFO "aoe: buf allocation failure\n");
bio_endio(bio, -ENOMEM);
return 0;
return;
}
memset(buf, 0, sizeof(*buf));
INIT_LIST_HEAD(&buf->bufs);
@ -211,7 +211,7 @@ aoeblk_make_request(struct request_queue *q, struct bio *bio)
spin_unlock_irqrestore(&d->lock, flags);
mempool_free(buf, d->bufpool);
bio_endio(bio, -ENXIO);
return 0;
return;
}
list_add_tail(&buf->bufs, &d->bufq);
@ -222,8 +222,6 @@ aoeblk_make_request(struct request_queue *q, struct bio *bio)
spin_unlock_irqrestore(&d->lock, flags);
aoenet_xmit(&queue);
return 0;
}
static int

4
drivers/block/brd.c
View file

@ -323,7 +323,7 @@ out:
return err;
}
static int brd_make_request(struct request_queue *q, struct bio *bio)
static void brd_make_request(struct request_queue *q, struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
struct brd_device *brd = bdev->bd_disk->private_data;
@ -359,8 +359,6 @@ static int brd_make_request(struct request_queue *q, struct bio *bio)
out:
bio_endio(bio, err);
return 0;
}
#ifdef CONFIG_BLK_DEV_XIP

2
drivers/block/drbd/drbd_int.h
View file

@ -1507,7 +1507,7 @@ extern void drbd_free_mdev(struct drbd_conf *mdev);
extern int proc_details;
/* drbd_req */
extern int drbd_make_request(struct request_queue *q, struct bio *bio);
extern void drbd_make_request(struct request_queue *q, struct bio *bio);
extern int drbd_read_remote(struct drbd_conf *mdev, struct drbd_request *req);
extern int drbd_merge_bvec(struct request_queue *q, struct bvec_merge_data *bvm, struct bio_vec *bvec);
extern int is_valid_ar_handle(struct drbd_request *, sector_t);

8
drivers/block/drbd/drbd_req.c
View file

@ -1073,7 +1073,7 @@ static int drbd_fail_request_early(struct drbd_conf *mdev, int is_write)
return 0;
}
int drbd_make_request(struct request_queue *q, struct bio *bio)
void drbd_make_request(struct request_queue *q, struct bio *bio)
{
unsigned int s_enr, e_enr;
struct drbd_conf *mdev = (struct drbd_conf *) q->queuedata;
@ -1081,7 +1081,7 @@ int drbd_make_request(struct request_queue *q, struct bio *bio)
if (drbd_fail_request_early(mdev, bio_data_dir(bio) & WRITE)) {
bio_endio(bio, -EPERM);
return 0;
return;
}
start_time = jiffies;
@ -1100,7 +1100,8 @@ int drbd_make_request(struct request_queue *q, struct bio *bio)
if (likely(s_enr == e_enr)) {
inc_ap_bio(mdev, 1);
return drbd_make_request_common(mdev, bio, start_time);
drbd_make_request_common(mdev, bio, start_time);
return;
}
/* can this bio be split generically?
@ -1148,7 +1149,6 @@ int drbd_make_request(struct request_queue *q, struct bio *bio)
bio_pair_release(bp);
}
return 0;
}
/* This is called by bio_add_page(). With this function we reduce

5
drivers/block/loop.c
View file

@ -514,7 +514,7 @@ static struct bio *loop_get_bio(struct loop_device *lo)
return bio_list_pop(&lo->lo_bio_list);
}
static int loop_make_request(struct request_queue *q, struct bio *old_bio)
static void loop_make_request(struct request_queue *q, struct bio *old_bio)
{
struct loop_device *lo = q->queuedata;
int rw = bio_rw(old_bio);
@ -532,12 +532,11 @@ static int loop_make_request(struct request_queue *q, struct bio *old_bio)
loop_add_bio(lo, old_bio);
wake_up(&lo->lo_event);
spin_unlock_irq(&lo->lo_lock);
return 0;
return;
out:
spin_unlock_irq(&lo->lo_lock);
bio_io_error(old_bio);
return 0;
}
struct switch_request {

11
drivers/block/pktcdvd.c
View file

@ -2444,7 +2444,7 @@ static void pkt_end_io_read_cloned(struct bio *bio, int err)
pkt_bio_finished(pd);
}
static int pkt_make_request(struct request_queue *q, struct bio *bio)
static void pkt_make_request(struct request_queue *q, struct bio *bio)
{
struct pktcdvd_device *pd;
char b[BDEVNAME_SIZE];
@ -2473,7 +2473,7 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
cloned_bio->bi_end_io = pkt_end_io_read_cloned;
pd->stats.secs_r += bio->bi_size >> 9;
pkt_queue_bio(pd, cloned_bio);
return 0;
return;
}
if (!test_bit(PACKET_WRITABLE, &pd->flags)) {
@ -2509,7 +2509,7 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
pkt_make_request(q, &bp->bio1);
pkt_make_request(q, &bp->bio2);
bio_pair_release(bp);
return 0;
return;
}
}
@ -2533,7 +2533,7 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
}
spin_unlock(&pkt->lock);
spin_unlock(&pd->cdrw.active_list_lock);
return 0;
return;
} else {
blocked_bio = 1;
}
@ -2584,10 +2584,9 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
*/
wake_up(&pd->wqueue);
}
return 0;
return;
end_io:
bio_io_error(bio);
return 0;
}

6
drivers/block/ps3vram.c
View file

@ -596,7 +596,7 @@ out:
return next;
}
static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
static void ps3vram_make_request(struct request_queue *q, struct bio *bio)
{
struct ps3_system_bus_device *dev = q->queuedata;
struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
@ -610,13 +610,11 @@ static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
spin_unlock_irq(&priv->lock);
if (busy)
return 0;
return;
do {
bio = ps3vram_do_bio(dev, bio);
} while (bio);
return 0;
}
static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)

4
drivers/block/umem.c
View file

@ -513,7 +513,7 @@ static void process_page(unsigned long data)
}
}
static int mm_make_request(struct request_queue *q, struct bio *bio)
static void mm_make_request(struct request_queue *q, struct bio *bio)
{
struct cardinfo *card = q->queuedata;
pr_debug("mm_make_request %llu %u\n",
@ -525,7 +525,7 @@ static int mm_make_request(struct request_queue *q, struct bio *bio)
card->biotail = &bio->bi_next;
spin_unlock_irq(&card->lock);
return 0;
return;
}
static irqreturn_t mm_interrupt(int irq, void *__card)

14
drivers/md/dm.c
View file

@ -1388,7 +1388,7 @@ out:
* The request function that just remaps the bio built up by
* dm_merge_bvec.
*/
static int _dm_request(struct request_queue *q, struct bio *bio)
static void _dm_request(struct request_queue *q, struct bio *bio)
{
int rw = bio_data_dir(bio);
struct mapped_device *md = q->queuedata;
@ -1409,12 +1409,12 @@ static int _dm_request(struct request_queue *q, struct bio *bio)
queue_io(md, bio);
else
bio_io_error(bio);
return 0;
return;
}
__split_and_process_bio(md, bio);
up_read(&md->io_lock);
return 0;
return;
}
static int dm_request_based(struct mapped_device *md)
@ -1422,14 +1422,14 @@ static int dm_request_based(struct mapped_device *md)
return blk_queue_stackable(md->queue);
}
static int dm_request(struct request_queue *q, struct bio *bio)
static void dm_request(struct request_queue *q, struct bio *bio)
{
struct mapped_device *md = q->queuedata;
if (dm_request_based(md))
return blk_queue_bio(q, bio);
return _dm_request(q, bio);
blk_queue_bio(q, bio);
else
_dm_request(q, bio);
}
void dm_dispatch_request(struct request *rq)

14
drivers/md/faulty.c
View file

@ -169,7 +169,7 @@ static void add_sector(conf_t *conf, sector_t start, int mode)
conf->nfaults = n+1;
}
static int make_request(mddev_t *mddev, struct bio *bio)
static void make_request(mddev_t *mddev, struct bio *bio)
{
conf_t *conf = mddev->private;
int failit = 0;
@ -181,7 +181,7 @@ static int make_request(mddev_t *mddev, struct bio *bio)
* just fail immediately
*/
bio_endio(bio, -EIO);
return 0;
return;
}
if (check_sector(conf, bio->bi_sector, bio->bi_sector+(bio->bi_size>>9),
@ -211,15 +211,15 @@ static int make_request(mddev_t *mddev, struct bio *bio)
}
if (failit) {
struct bio *b = bio_clone_mddev(bio, GFP_NOIO, mddev);
b->bi_bdev = conf->rdev->bdev;
b->bi_private = bio;
b->bi_end_io = faulty_fail;
generic_make_request(b);
return 0;
} else {
bio = b;
} else
bio->bi_bdev = conf->rdev->bdev;
return 1;
}
generic_make_request(bio);
}
static void status(struct seq_file *seq, mddev_t *mddev)

17
drivers/md/linear.c
View file

@ -264,14 +264,14 @@ static int linear_stop (mddev_t *mddev)
return 0;
}
static int linear_make_request (mddev_t *mddev, struct bio *bio)
static void linear_make_request (mddev_t *mddev, struct bio *bio)
{
dev_info_t *tmp_dev;
sector_t start_sector;
if (unlikely(bio->bi_rw & REQ_FLUSH)) {
md_flush_request(mddev, bio);
return 0;
return;
}
rcu_read_lock();
@ -293,7 +293,7 @@ static int linear_make_request (mddev_t *mddev, struct bio *bio)
(unsigned long long)start_sector);
rcu_read_unlock();
bio_io_error(bio);
return 0;
return;
}
if (unlikely(bio->bi_sector + (bio->bi_size >> 9) >
tmp_dev->end_sector)) {
@ -307,20 +307,17 @@ static int linear_make_request (mddev_t *mddev, struct bio *bio)
bp = bio_split(bio, end_sector - bio->bi_sector);
if (linear_make_request(mddev, &bp->bio1))
generic_make_request(&bp->bio1);
if (linear_make_request(mddev, &bp->bio2))
generic_make_request(&bp->bio2);
linear_make_request(mddev, &bp->bio1);
linear_make_request(mddev, &bp->bio2);
bio_pair_release(bp);
return 0;
return;
}
bio->bi_bdev = tmp_dev->rdev->bdev;
bio->bi_sector = bio->bi_sector - start_sector
+ tmp_dev->rdev->data_offset;
rcu_read_unlock();
return 1;
generic_make_request(bio);
}
static void linear_status (struct seq_file *seq, mddev_t *mddev)

12
drivers/md/md.c
View file

@ -330,18 +330,17 @@ static DEFINE_SPINLOCK(all_mddevs_lock);
* call has finished, the bio has been linked into some internal structure
* and so is visible to ->quiesce(), so we don't need the refcount any more.
*/
static int md_make_request(struct request_queue *q, struct bio *bio)
static void md_make_request(struct request_queue *q, struct bio *bio)
{
const int rw = bio_data_dir(bio);
mddev_t *mddev = q->queuedata;
int rv;
int cpu;
unsigned int sectors;
if (mddev == NULL || mddev->pers == NULL
|| !mddev->ready) {
bio_io_error(bio);
return 0;
return;
}
smp_rmb(); /* Ensure implications of 'active' are visible */
rcu_read_lock();
@ -366,7 +365,7 @@ static int md_make_request(struct request_queue *q, struct bio *bio)
* go away inside make_request
*/
sectors = bio_sectors(bio);
rv = mddev->pers->make_request(mddev, bio);
mddev->pers->make_request(mddev, bio);
cpu = part_stat_lock();
part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]);
@ -375,8 +374,6 @@ static int md_make_request(struct request_queue *q, struct bio *bio)
if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended)
wake_up(&mddev->sb_wait);
return rv;
}
/* mddev_suspend makes sure no new requests are submitted
@ -475,8 +472,7 @@ static void md_submit_flush_data(struct work_struct *ws)
bio_endio(bio, 0);
else {
bio->bi_rw &= ~REQ_FLUSH;
if (mddev->pers->make_request(mddev, bio))
generic_make_request(bio);
mddev->pers->make_request(mddev, bio);
}
mddev->flush_bio = NULL;

2
drivers/md/md.h
View file

@ -424,7 +424,7 @@ struct mdk_personality
int level;
struct list_head list;
struct module *owner;
int (*make_request)(mddev_t *mddev, struct bio *bio);
void (*make_request)(mddev_t *mddev, struct bio *bio);
int (*run)(mddev_t *mddev);
int (*stop)(mddev_t *mddev);
void (*status)(struct seq_file *seq, mddev_t *mddev);

8
drivers/md/multipath.c
View file

@ -106,7 +106,7 @@ static void multipath_end_request(struct bio *bio, int error)
rdev_dec_pending(rdev, conf->mddev);
}
static int multipath_make_request(mddev_t *mddev, struct bio * bio)
static void multipath_make_request(mddev_t *mddev, struct bio * bio)
{
multipath_conf_t *conf = mddev->private;
struct multipath_bh * mp_bh;
@ -114,7 +114,7 @@ static int multipath_make_request(mddev_t *mddev, struct bio * bio)
if (unlikely(bio->bi_rw & REQ_FLUSH)) {
md_flush_request(mddev, bio);
return 0;
return;
}
mp_bh = mempool_alloc(conf->pool, GFP_NOIO);
@ -126,7 +126,7 @@ static int multipath_make_request(mddev_t *mddev, struct bio * bio)
if (mp_bh->path < 0) {
bio_endio(bio, -EIO);
mempool_free(mp_bh, conf->pool);
return 0;
return;
}
multipath = conf->multipaths + mp_bh->path;
@ -137,7 +137,7 @@ static int multipath_make_request(mddev_t *mddev, struct bio * bio)
mp_bh->bio.bi_end_io = multipath_end_request;
mp_bh->bio.bi_private = mp_bh;
generic_make_request(&mp_bh->bio);
return 0;
return;
}
static void multipath_status (struct seq_file *seq, mddev_t *mddev)

22
drivers/md/raid0.c
View file

@ -466,7 +466,7 @@ static inline int is_io_in_chunk_boundary(mddev_t *mddev,
}
}
static int raid0_make_request(mddev_t *mddev, struct bio *bio)
static void raid0_make_request(mddev_t *mddev, struct bio *bio)
{
unsigned int chunk_sects;
sector_t sector_offset;
@ -475,7 +475,7 @@ static int raid0_make_request(mddev_t *mddev, struct bio *bio)
if (unlikely(bio->bi_rw & REQ_FLUSH)) {
md_flush_request(mddev, bio);
return 0;
return;
}
chunk_sects = mddev->chunk_sectors;
@ -495,13 +495,10 @@ static int raid0_make_request(mddev_t *mddev, struct bio *bio)
else
bp = bio_split(bio, chunk_sects -
sector_div(sector, chunk_sects));
if (raid0_make_request(mddev, &bp->bio1))
generic_make_request(&bp->bio1);
if (raid0_make_request(mddev, &bp->bio2))
generic_make_request(&bp->bio2);
raid0_make_request(mddev, &bp->bio1);
raid0_make_request(mddev, &bp->bio2);
bio_pair_release(bp);
return 0;
return;
}
sector_offset = bio->bi_sector;
@ -511,10 +508,9 @@ static int raid0_make_request(mddev_t *mddev, struct bio *bio)
bio->bi_bdev = tmp_dev->bdev;
bio->bi_sector = sector_offset + zone->dev_start +
tmp_dev->data_offset;
/*
* Let the main block layer submit the IO and resolve recursion:
*/
return 1;
generic_make_request(bio);
return;
bad_map:
printk("md/raid0:%s: make_request bug: can't convert block across chunks"
@ -523,7 +519,7 @@ bad_map:
(unsigned long long)bio->bi_sector, bio->bi_size >> 10);
bio_io_error(bio);
return 0;
return;
}
static void raid0_status(struct seq_file *seq, mddev_t *mddev)

8
drivers/md/raid1.c
View file

@ -785,7 +785,7 @@ do_sync_io:
PRINTK("%dB behind alloc failed, doing sync I/O\n", bio->bi_size);
}
static int make_request(mddev_t *mddev, struct bio * bio)
static void make_request(mddev_t *mddev, struct bio * bio)
{
conf_t *conf = mddev->private;
mirror_info_t *mirror;
@ -870,7 +870,7 @@ read_again:
if (rdisk < 0) {
/* couldn't find anywhere to read from */
raid_end_bio_io(r1_bio);
return 0;
return;
}
mirror = conf->mirrors + rdisk;
@ -928,7 +928,7 @@ read_again:
goto read_again;
} else
generic_make_request(read_bio);
return 0;
return;
}
/*
@ -1119,8 +1119,6 @@ read_again:
if (do_sync || !bitmap || !plugged)
md_wakeup_thread(mddev->thread);
return 0;
}
static void status(struct seq_file *seq, mddev_t *mddev)

19
drivers/md/raid10.c
View file

@ -825,7 +825,7 @@ static void unfreeze_array(conf_t *conf)
spin_unlock_irq(&conf->resync_lock);
}
static int make_request(mddev_t *mddev, struct bio * bio)
static void make_request(mddev_t *mddev, struct bio * bio)
{
conf_t *conf = mddev->private;
mirror_info_t *mirror;
@ -844,7 +844,7 @@ static int make_request(mddev_t *mddev, struct bio * bio)
if (unlikely(bio->bi_rw & REQ_FLUSH)) {
md_flush_request(mddev, bio);
return 0;
return;
}
/* If this request crosses a chunk boundary, we need to
@ -876,10 +876,8 @@ static int make_request(mddev_t *mddev, struct bio * bio)
conf->nr_waiting++;
spin_unlock_irq(&conf->resync_lock);
if (make_request(mddev, &bp->bio1))
generic_make_request(&bp->bio1);
if (make_request(mddev, &bp->bio2))
generic_make_request(&bp->bio2);
make_request(mddev, &bp->bio1);
make_request(mddev, &bp->bio2);
spin_lock_irq(&conf->resync_lock);
conf->nr_waiting--;
@ -887,14 +885,14 @@ static int make_request(mddev_t *mddev, struct bio * bio)
spin_unlock_irq(&conf->resync_lock);
bio_pair_release(bp);
return 0;
return;
bad_map:
printk("md/raid10:%s: make_request bug: can't convert block across chunks"
" or bigger than %dk %llu %d\n", mdname(mddev), chunk_sects/2,
(unsigned long long)bio->bi_sector, bio->bi_size >> 10);
bio_io_error(bio);
return 0;
return;
}
md_write_start(mddev, bio);
@ -937,7 +935,7 @@ read_again:
slot = r10_bio->read_slot;
if (disk < 0) {
raid_end_bio_io(r10_bio);
return 0;
return;
}
mirror = conf->mirrors + disk;
@ -985,7 +983,7 @@ read_again:
goto read_again;
} else
generic_make_request(read_bio);
return 0;
return;
}
/*
@ -1157,7 +1155,6 @@ retry_write:
if (do_sync || !mddev->bitmap || !plugged)
md_wakeup_thread(mddev->thread);
return 0;
}
static void status(struct seq_file *seq, mddev_t *mddev)

8
drivers/md/raid5.c
View file

@ -3695,7 +3695,7 @@ static struct stripe_head *__get_priority_stripe(raid5_conf_t *conf)
return sh;
}
static int make_request(mddev_t *mddev, struct bio * bi)
static void make_request(mddev_t *mddev, struct bio * bi)
{
raid5_conf_t *conf = mddev->private;
int dd_idx;
@ -3708,7 +3708,7 @@ static int make_request(mddev_t *mddev, struct bio * bi)
if (unlikely(bi->bi_rw & REQ_FLUSH)) {
md_flush_request(mddev, bi);
return 0;
return;
}
md_write_start(mddev, bi);
@ -3716,7 +3716,7 @@ static int make_request(mddev_t *mddev, struct bio * bi)
if (rw == READ &&
mddev->reshape_position == MaxSector &&
chunk_aligned_read(mddev,bi))
return 0;
return;
logical_sector = bi->bi_sector & ~((sector_t)STRIPE_SECTORS-1);
last_sector = bi->bi_sector + (bi->bi_size>>9);
@ -3851,8 +3851,6 @@ static int make_request(mddev_t *mddev, struct bio * bi)
bio_endio(bi, 0);
}
return 0;
}
static sector_t raid5_size(mddev_t *mddev, sector_t sectors, int raid_disks);

7
drivers/s390/block/dcssblk.c
View file

@ -27,7 +27,7 @@
static int dcssblk_open(struct block_device *bdev, fmode_t mode);
static int dcssblk_release(struct gendisk *disk, fmode_t mode);
static int dcssblk_make_request(struct request_queue *q, struct bio *bio);
static void dcssblk_make_request(struct request_queue *q, struct bio *bio);
static int dcssblk_direct_access(struct block_device *bdev, sector_t secnum,
void **kaddr, unsigned long *pfn);
@ -814,7 +814,7 @@ out:
return rc;
}
static int
static void
dcssblk_make_request(struct request_queue *q, struct bio *bio)
{
struct dcssblk_dev_info *dev_info;
@ -871,10 +871,9 @@ dcssblk_make_request(struct request_queue *q, struct bio *bio)
bytes_done += bvec->bv_len;
}
bio_endio(bio, 0);
return 0;
return;
fail:
bio_io_error(bio);
return 0;
}
static int

5
drivers/s390/block/xpram.c
View file

@ -181,7 +181,7 @@ static unsigned long xpram_highest_page_index(void)
/*
* Block device make request function.
*/
static int xpram_make_request(struct request_queue *q, struct bio *bio)
static void xpram_make_request(struct request_queue *q, struct bio *bio)
{
xpram_device_t *xdev = bio->bi_bdev->bd_disk->private_data;
struct bio_vec *bvec;
@ -221,10 +221,9 @@ static int xpram_make_request(struct request_queue *q, struct bio *bio)
}
set_bit(BIO_UPTODATE, &bio->bi_flags);
bio_endio(bio, 0);
return 0;
return;
fail:
bio_io_error(bio);
return 0;
}
static int xpram_getgeo(struct block_device *bdev, struct hd_geometry *geo)

8
drivers/staging/zram/zram_drv.c
View file

@ -556,24 +556,22 @@ static inline int valid_io_request(struct zram *zram, struct bio *bio)
/*
* Handler function for all zram I/O requests.
*/
static int zram_make_request(struct request_queue *queue, struct bio *bio)
static void zram_make_request(struct request_queue *queue, struct bio *bio)
{
struct zram *zram = queue->queuedata;
if (!valid_io_request(zram, bio)) {
zram_stat64_inc(zram, &zram->stats.invalid_io);
bio_io_error(bio);
return 0;
return;
}
if (unlikely(!zram->init_done) && zram_init_device(zram)) {
bio_io_error(bio);
return 0;
return;
}
__zram_make_request(zram, bio, bio_data_dir(bio));
return 0;
}
void zram_reset_device(struct zram *zram)

4
include/linux/blkdev.h
View file

@ -193,7 +193,7 @@ struct request_pm_state
#include <linux/elevator.h>
typedef void (request_fn_proc) (struct request_queue *q);
typedef int (make_request_fn) (struct request_queue *q, struct bio *bio);
typedef void (make_request_fn) (struct request_queue *q, struct bio *bio);
typedef int (prep_rq_fn) (struct request_queue *, struct request *);
typedef void (unprep_rq_fn) (struct request_queue *, struct request *);
@ -675,7 +675,7 @@ extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t,
extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
struct scsi_ioctl_command __user *);
extern int blk_queue_bio(struct request_queue *q, struct bio *bio);
extern void blk_queue_bio(struct request_queue *q, struct bio *bio);
/*
* A queue has just exitted congestion. Note this in the global counter of