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author | 2013-08-07 14:33:00 -0700 | |
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committer | 2013-11-23 22:33:57 -0800 | |
commit | 4b1faf931650d4a35b2a570318862821d6a962e3 (patch) | |
tree | 1e9002a82c7108ea8d54efa2bb88537b2f6f4e11 /fs/bio.c | |
parent | block: Introduce new bio_split() (diff) | |
download | linux-4b1faf931650d4a35b2a570318862821d6a962e3.tar.gz linux-4b1faf931650d4a35b2a570318862821d6a962e3.tar.bz2 linux-4b1faf931650d4a35b2a570318862821d6a962e3.zip |
block: Kill bio_pair_split()
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/bio.c')
-rw-r--r-- | fs/bio.c | 90 |
1 files changed, 0 insertions, 90 deletions
@@ -38,8 +38,6 @@ */ #define BIO_INLINE_VECS 4 -static mempool_t *bio_split_pool __read_mostly; - /* * if you change this list, also change bvec_alloc or things will * break badly! cannot be bigger than what you can fit into an @@ -1829,89 +1827,6 @@ struct bio *bio_split(struct bio *bio, int sectors, } EXPORT_SYMBOL(bio_split); -void bio_pair_release(struct bio_pair *bp) -{ - if (atomic_dec_and_test(&bp->cnt)) { - struct bio *master = bp->bio1.bi_private; - - bio_endio(master, bp->error); - mempool_free(bp, bp->bio2.bi_private); - } -} -EXPORT_SYMBOL(bio_pair_release); - -static void bio_pair_end_1(struct bio *bi, int err) -{ - struct bio_pair *bp = container_of(bi, struct bio_pair, bio1); - - if (err) - bp->error = err; - - bio_pair_release(bp); -} - -static void bio_pair_end_2(struct bio *bi, int err) -{ - struct bio_pair *bp = container_of(bi, struct bio_pair, bio2); - - if (err) - bp->error = err; - - bio_pair_release(bp); -} - -/* - * split a bio - only worry about a bio with a single page in its iovec - */ -struct bio_pair *bio_pair_split(struct bio *bi, int first_sectors) -{ - struct bio_pair *bp = mempool_alloc(bio_split_pool, GFP_NOIO); - - if (!bp) - return bp; - - trace_block_split(bdev_get_queue(bi->bi_bdev), bi, - bi->bi_iter.bi_sector + first_sectors); - - BUG_ON(bio_multiple_segments(bi)); - atomic_set(&bp->cnt, 3); - bp->error = 0; - bp->bio1 = *bi; - bp->bio2 = *bi; - bp->bio2.bi_iter.bi_sector += first_sectors; - bp->bio2.bi_iter.bi_size -= first_sectors << 9; - bp->bio1.bi_iter.bi_size = first_sectors << 9; - - if (bi->bi_vcnt != 0) { - bp->bv1 = bio_iovec(bi); - bp->bv2 = bio_iovec(bi); - - if (bio_is_rw(bi)) { - bp->bv2.bv_offset += first_sectors << 9; - bp->bv2.bv_len -= first_sectors << 9; - bp->bv1.bv_len = first_sectors << 9; - } - - bp->bio1.bi_io_vec = &bp->bv1; - bp->bio2.bi_io_vec = &bp->bv2; - - bp->bio1.bi_max_vecs = 1; - bp->bio2.bi_max_vecs = 1; - } - - bp->bio1.bi_end_io = bio_pair_end_1; - bp->bio2.bi_end_io = bio_pair_end_2; - - bp->bio1.bi_private = bi; - bp->bio2.bi_private = bio_split_pool; - - if (bio_integrity(bi)) - bio_integrity_split(bi, bp, first_sectors); - - return bp; -} -EXPORT_SYMBOL(bio_pair_split); - /** * bio_trim - trim a bio * @bio: bio to trim @@ -2113,11 +2028,6 @@ static int __init init_bio(void) if (bioset_integrity_create(fs_bio_set, BIO_POOL_SIZE)) panic("bio: can't create integrity pool\n"); - bio_split_pool = mempool_create_kmalloc_pool(BIO_SPLIT_ENTRIES, - sizeof(struct bio_pair)); - if (!bio_split_pool) - panic("bio: can't create split pool\n"); - return 0; } subsys_initcall(init_bio); |