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authorShaohua Li <shli@fb.com>2017-05-01 14:09:21 -0700
committerShaohua Li <shli@fb.com>2017-05-01 14:09:21 -0700
commite265eb3a30543a237b2ebc4e0422ac82e55b07e4 (patch)
tree5485bce4a0645e5e9b6ef4686bd390b7b2599ffb /block/bio.c
parent85724edecbdc19f53ed4b902fc3a32e4d1b61c9b (diff)
parentb506335e5d2b4ec687dde392a3bdbf7601778f1d (diff)
Merge branch 'md-next' into md-linus
Diffstat (limited to 'block/bio.c')
-rw-r--r--block/bio.c61
1 files changed, 13 insertions, 48 deletions
diff --git a/block/bio.c b/block/bio.c
index f4d207180266..888e7801c638 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -633,20 +633,21 @@ struct bio *bio_clone_fast(struct bio *bio, gfp_t gfp_mask, struct bio_set *bs)
}
EXPORT_SYMBOL(bio_clone_fast);
-static struct bio *__bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
- struct bio_set *bs, int offset,
- int size)
+/**
+ * bio_clone_bioset - clone a bio
+ * @bio_src: bio to clone
+ * @gfp_mask: allocation priority
+ * @bs: bio_set to allocate from
+ *
+ * Clone bio. Caller will own the returned bio, but not the actual data it
+ * points to. Reference count of returned bio will be one.
+ */
+struct bio *bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
+ struct bio_set *bs)
{
struct bvec_iter iter;
struct bio_vec bv;
struct bio *bio;
- struct bvec_iter iter_src = bio_src->bi_iter;
-
- /* for supporting partial clone */
- if (offset || size != bio_src->bi_iter.bi_size) {
- bio_advance_iter(bio_src, &iter_src, offset);
- iter_src.bi_size = size;
- }
/*
* Pre immutable biovecs, __bio_clone() used to just do a memcpy from
@@ -670,8 +671,7 @@ static struct bio *__bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
* __bio_clone_fast() anyways.
*/
- bio = bio_alloc_bioset(gfp_mask, __bio_segments(bio_src,
- &iter_src), bs);
+ bio = bio_alloc_bioset(gfp_mask, bio_segments(bio_src), bs);
if (!bio)
return NULL;
bio->bi_bdev = bio_src->bi_bdev;
@@ -688,7 +688,7 @@ static struct bio *__bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
bio->bi_io_vec[bio->bi_vcnt++] = bio_src->bi_io_vec[0];
break;
default:
- __bio_for_each_segment(bv, bio_src, iter, iter_src)
+ bio_for_each_segment(bv, bio_src, iter)
bio->bi_io_vec[bio->bi_vcnt++] = bv;
break;
}
@@ -707,44 +707,9 @@ static struct bio *__bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
return bio;
}
-
-/**
- * bio_clone_bioset - clone a bio
- * @bio_src: bio to clone
- * @gfp_mask: allocation priority
- * @bs: bio_set to allocate from
- *
- * Clone bio. Caller will own the returned bio, but not the actual data it
- * points to. Reference count of returned bio will be one.
- */
-struct bio *bio_clone_bioset(struct bio *bio_src, gfp_t gfp_mask,
- struct bio_set *bs)
-{
- return __bio_clone_bioset(bio_src, gfp_mask, bs, 0,
- bio_src->bi_iter.bi_size);
-}
EXPORT_SYMBOL(bio_clone_bioset);
/**
- * bio_clone_bioset_partial - clone a partial bio
- * @bio_src: bio to clone
- * @gfp_mask: allocation priority
- * @bs: bio_set to allocate from
- * @offset: cloned starting from the offset
- * @size: size for the cloned bio
- *
- * Clone bio. Caller will own the returned bio, but not the actual data it
- * points to. Reference count of returned bio will be one.
- */
-struct bio *bio_clone_bioset_partial(struct bio *bio_src, gfp_t gfp_mask,
- struct bio_set *bs, int offset,
- int size)
-{
- return __bio_clone_bioset(bio_src, gfp_mask, bs, offset, size);
-}
-EXPORT_SYMBOL(bio_clone_bioset_partial);
-
-/**
* bio_add_pc_page - attempt to add page to bio
* @q: the target queue
* @bio: destination bio