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block: remove support for bio remapping from ->make_request

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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
parent c20e8de27f
commit 5a7bbad27a
25 changed files with 155 additions and 219 deletions
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19
drivers/md/raid10.c
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@@ -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)