[PATCH v1 52/54] btrfs: use bvec_get_last_sp to get the last singlepage bvec
From: Ming Lei <tom.leiming@gmail.com>
Date: 2016-12-27 16:07:45
Also in:
lkml
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
Preparing for supporting multipage bvec. Signed-off-by: Ming Lei <tom.leiming@gmail.com> --- fs/btrfs/compression.c | 5 ++++- fs/btrfs/extent_io.c | 8 ++++++-- 2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index adcf5568f010..485a60923bba 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c@@ -448,8 +448,11 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start, static u64 bio_end_offset(struct bio *bio) { struct bio_vec *last = &bio->bi_io_vec[bio->bi_vcnt - 1]; + struct bio_vec uninitialized_var(bv); - return page_offset(last->bv_page) + last->bv_len + last->bv_offset; + bvec_get_last_sp(last, &bv); + + return page_offset(bv.bv_page) + bv.bv_len + bv.bv_offset; } static noinline int add_ra_bio_pages(struct inode *inode,
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 3c021f4dd8bf..4a1c81cee883 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c@@ -2733,11 +2733,15 @@ static int __must_check submit_one_bio(struct bio *bio, int mirror_num, { int ret = 0; struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; - struct page *page = bvec->bv_page; struct extent_io_tree *tree = bio->bi_private; + struct bio_vec uninitialized_var(bv); + struct page *page; u64 start; - start = page_offset(page) + bvec->bv_offset; + bvec_get_last_sp(bvec, &bv); + page = bv.bv_page; + + start = page_offset(page) + bv.bv_offset; bio->bi_private = NULL; bio_get(bio);
--
2.7.4