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authorChristoph Hellwig <hch@lst.de>2017-08-23 20:10:32 +0300
committerJens Axboe <axboe@kernel.dk>2017-08-23 21:49:55 +0300
commit74d46992e0d9dee7f1f376de0d56d31614c8a17a (patch)
tree399c316bb960541135e557bc1765caeec6d00084 /block/blk-lib.c
parentc2ee070fb00365d7841f6661dcdc7fbe6620bdf8 (diff)
downloadlinux-74d46992e0d9dee7f1f376de0d56d31614c8a17a.tar.xz
block: replace bi_bdev with a gendisk pointer and partitions index
This way we don't need a block_device structure to submit I/O. The block_device has different life time rules from the gendisk and request_queue and is usually only available when the block device node is open. Other callers need to explicitly create one (e.g. the lightnvm passthrough code, or the new nvme multipathing code). For the actual I/O path all that we need is the gendisk, which exists once per block device. But given that the block layer also does partition remapping we additionally need a partition index, which is used for said remapping in generic_make_request. Note that all the block drivers generally want request_queue or sometimes the gendisk, so this removes a layer of indirection all over the stack. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-lib.c')
-rw-r--r--block/blk-lib.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/block/blk-lib.c b/block/blk-lib.c
index 3fe0aec90597..e01adb5145b3 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -77,7 +77,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
bio = next_bio(bio, 0, gfp_mask);
bio->bi_iter.bi_sector = sector;
- bio->bi_bdev = bdev;
+ bio_set_dev(bio, bdev);
bio_set_op_attrs(bio, op, 0);
bio->bi_iter.bi_size = req_sects << 9;
@@ -168,7 +168,7 @@ static int __blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
while (nr_sects) {
bio = next_bio(bio, 1, gfp_mask);
bio->bi_iter.bi_sector = sector;
- bio->bi_bdev = bdev;
+ bio_set_dev(bio, bdev);
bio->bi_vcnt = 1;
bio->bi_io_vec->bv_page = page;
bio->bi_io_vec->bv_offset = 0;
@@ -241,7 +241,7 @@ static int __blkdev_issue_write_zeroes(struct block_device *bdev,
while (nr_sects) {
bio = next_bio(bio, 0, gfp_mask);
bio->bi_iter.bi_sector = sector;
- bio->bi_bdev = bdev;
+ bio_set_dev(bio, bdev);
bio->bi_opf = REQ_OP_WRITE_ZEROES;
if (flags & BLKDEV_ZERO_NOUNMAP)
bio->bi_opf |= REQ_NOUNMAP;
@@ -323,7 +323,7 @@ int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
bio = next_bio(bio, __blkdev_sectors_to_bio_pages(nr_sects),
gfp_mask);
bio->bi_iter.bi_sector = sector;
- bio->bi_bdev = bdev;
+ bio_set_dev(bio, bdev);
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
while (nr_sects != 0) {