[PATCH 10/17] btrfs: make metadata write endio functions to be split bio compatible

[Qu Wenruo <wqu@suse.com>]

Only need to convert the bio_for_each_segment_all() call into
__bio_for_each_segment() call and using btrfs_bio::iter as the initial
iterator.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/extent_io.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 524a00ba0ca0..8f5a1059a296 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4495,20 +4495,20 @@ static struct extent_buffer *find_extent_buffer_nolock(
 static void end_bio_subpage_eb_writepage(struct bio *bio)
 {
 	struct btrfs_fs_info *fs_info;
-	struct bio_vec *bvec;
-	struct bvec_iter_all iter_all;
+	struct bvec_iter iter;
+	struct bio_vec bvec;
 
 	fs_info = btrfs_sb(bio_first_page_all(bio)->mapping->host->i_sb);
 	ASSERT(fs_info->sectorsize < PAGE_SIZE);
 
-	ASSERT(!bio_flagged(bio, BIO_CLONED));
-	bio_for_each_segment_all(bvec, bio, iter_all) {
-		struct page *page = bvec->bv_page;
-		u64 bvec_start = page_offset(page) + bvec->bv_offset;
-		u64 bvec_end = bvec_start + bvec->bv_len - 1;
+	ASSERT(btrfs_bio(bio)->iter.bi_size);
+	__bio_for_each_segment(bvec, bio, iter, btrfs_bio(bio)->iter) {
+		struct page *page = bvec.bv_page;
+		u64 bvec_start = page_offset(page) + bvec.bv_offset;
+		u64 bvec_end = bvec_start + bvec.bv_len - 1;
 		u64 cur_bytenr = bvec_start;
 
-		ASSERT(IS_ALIGNED(bvec->bv_len, fs_info->nodesize));
+		ASSERT(IS_ALIGNED(bvec.bv_len, fs_info->nodesize));
 
 		/* Iterate through all extent buffers in the range */
 		while (cur_bytenr <= bvec_end) {
@@ -4551,14 +4551,14 @@ static void end_bio_subpage_eb_writepage(struct bio *bio)
 
 static void end_bio_extent_buffer_writepage(struct bio *bio)
 {
-	struct bio_vec *bvec;
 	struct extent_buffer *eb;
+	struct bvec_iter iter;
+	struct bio_vec bvec;
 	int done;
-	struct bvec_iter_all iter_all;
 
-	ASSERT(!bio_flagged(bio, BIO_CLONED));
-	bio_for_each_segment_all(bvec, bio, iter_all) {
-		struct page *page = bvec->bv_page;
+	ASSERT(btrfs_bio(bio)->iter.bi_size);
+	__bio_for_each_segment(bvec, bio, iter, btrfs_bio(bio)->iter) {
+		struct page *page = bvec.bv_page;
 
 		eb = (struct extent_buffer *)page->private;
 		BUG_ON(!eb);
-- 
2.34.1