1 files changed, 20 insertions, 29 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index fd78c84821c8..ae69a00387e7 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2029,7 +2029,7 @@ int repair_io_failure(struct btrfs_fs_info *fs_info, u64 start,
         bio = btrfs_io_bio_alloc(GFP_NOFS, 1);
         if (!bio)
                 return -EIO;
-        bio->bi_size = 0;
+        bio->bi_iter.bi_size = 0;
         map_length = length;
 
         ret = btrfs_map_block(fs_info, WRITE, logical,
@@ -2040,7 +2040,7 @@ int repair_io_failure(struct btrfs_fs_info *fs_info, u64 start,
         }
         BUG_ON(mirror_num != bbio->mirror_num);
         sector = bbio->stripes[mirror_num-1].physical >> 9;
-        bio->bi_sector = sector;
+        bio->bi_iter.bi_sector = sector;
         dev = bbio->stripes[mirror_num-1].dev;
         kfree(bbio);
         if (!dev || !dev->bdev || !dev->writeable) {
@@ -2314,9 +2314,9 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset,
                 return -EIO;
         }
         bio->bi_end_io = failed_bio->bi_end_io;
-        bio->bi_sector = failrec->logical >> 9;
+        bio->bi_iter.bi_sector = failrec->logical >> 9;
         bio->bi_bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev;
-        bio->bi_size = 0;
+        bio->bi_iter.bi_size = 0;
 
         btrfs_failed_bio = btrfs_io_bio(failed_bio);
         if (btrfs_failed_bio->csum) {
@@ -2378,11 +2378,12 @@ int end_extent_writepage(struct page *page, int err, u64 start, u64 end)
  */
 static void end_bio_extent_writepage(struct bio *bio, int err)
 {
-        struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
+        struct bio_vec *bvec;
         u64 start;
         u64 end;
+        int i;
 
-        do {
+        bio_for_each_segment_all(bvec, bio, i) {
                 struct page *page = bvec->bv_page;
 
                 /* We always issue full-page reads, but if some block
@@ -2405,14 +2406,11 @@ static void end_bio_extent_writepage(struct bio *bio, int err)
                 start = page_offset(page);
                 end = start + bvec->bv_offset + bvec->bv_len - 1;
 
-                if (--bvec >= bio->bi_io_vec)
-                        prefetchw(&bvec->bv_page->flags);
-
                 if (end_extent_writepage(page, err, start, end))
                         continue;
 
                 end_page_writeback(page);
-        } while (bvec >= bio->bi_io_vec);
+        }
 
         bio_put(bio);
 }
@@ -2442,9 +2440,8 @@ endio_readpage_release_extent(struct extent_io_tree *tree, u64 start, u64 len,
  */
 static void end_bio_extent_readpage(struct bio *bio, int err)
 {
+        struct bio_vec *bvec;
         int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
-        struct bio_vec *bvec_end = bio->bi_io_vec + bio->bi_vcnt - 1;
-        struct bio_vec *bvec = bio->bi_io_vec;
         struct btrfs_io_bio *io_bio = btrfs_io_bio(bio);
         struct extent_io_tree *tree;
         u64 offset = 0;
@@ -2455,16 +2452,17 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
         u64 extent_len = 0;
         int mirror;
         int ret;
+        int i;
 
         if (err)
                 uptodate = 0;
 
-        do {
+        bio_for_each_segment_all(bvec, bio, i) {
                 struct page *page = bvec->bv_page;
                 struct inode *inode = page->mapping->host;
 
                 pr_debug("end_bio_extent_readpage: bi_sector=%llu, err=%d, "
-                         "mirror=%lu\n", (u64)bio->bi_sector, err,
+                         "mirror=%lu\n", (u64)bio->bi_iter.bi_sector, err,
                          io_bio->mirror_num);
                 tree = &BTRFS_I(inode)->io_tree;
 
@@ -2489,9 +2487,6 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
                 end = start + bvec->bv_offset + bvec->bv_len - 1;
                 len = bvec->bv_len;
 
-                if (++bvec <= bvec_end)
-                        prefetchw(&bvec->bv_page->flags);
-
                 mirror = io_bio->mirror_num;
                 if (likely(uptodate && tree->ops &&
                            tree->ops->readpage_end_io_hook)) {
@@ -2572,7 +2567,7 @@ readpage_ok:
                         extent_start = start;
                         extent_len = end + 1 - start;
                 }
-        } while (bvec <= bvec_end);
+        }
 
         if (extent_len)
                 endio_readpage_release_extent(tree, extent_start, extent_len,
@@ -2603,9 +2598,8 @@ btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
         }
 
         if (bio) {
-                bio->bi_size = 0;
                 bio->bi_bdev = bdev;
-                bio->bi_sector = first_sector;
+                bio->bi_iter.bi_sector = first_sector;
                 btrfs_bio = btrfs_io_bio(bio);
                 btrfs_bio->csum = NULL;
                 btrfs_bio->csum_allocated = NULL;
@@ -2699,7 +2693,7 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
         if (bio_ret && *bio_ret) {
                 bio = *bio_ret;
                 if (old_compressed)
-                        contig = bio->bi_sector == sector;
+                        contig = bio->bi_iter.bi_sector == sector;
                 else
                         contig = bio_end_sector(bio) == sector;
 
@@ -3466,20 +3460,18 @@ static void end_extent_buffer_writeback(struct extent_buffer *eb)
 
 static void end_bio_extent_buffer_writepage(struct bio *bio, int err)
 {
-        int uptodate = err == 0;
-        struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
+        struct bio_vec *bvec;
         struct extent_buffer *eb;
-        int done;
+        int i, done;
 
-        do {
+        bio_for_each_segment_all(bvec, bio, i) {
                 struct page *page = bvec->bv_page;
 
-                bvec--;
                 eb = (struct extent_buffer *)page->private;
                 BUG_ON(!eb);
                 done = atomic_dec_and_test(&eb->io_pages);
 
-                if (!uptodate || test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) {
+                if (err || test_bit(EXTENT_BUFFER_IOERR, &eb->bflags)) {
                         set_bit(EXTENT_BUFFER_IOERR, &eb->bflags);
                         ClearPageUptodate(page);
                         SetPageError(page);
@@ -3491,10 +3483,9 @@ static void end_bio_extent_buffer_writepage(struct bio *bio, int err)
                         continue;
 
                 end_extent_buffer_writeback(eb);
-        } while (bvec >= bio->bi_io_vec);
+        }
 
         bio_put(bio);
-
 }
 
 static int write_one_eb(struct extent_buffer *eb,