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alistair23-linux
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block: remove support for bio remapping from ->make_request 

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>
hifive-unleashed-5.1
Christoph Hellwig 2011-09-12 12:12:01 +02:00 committed by Jens Axboe
parent c20e8de27f
commit 5a7bbad27a
25 changed files with 155 additions and 219 deletions
Show Stats 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