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-rw-r--r--fs/btrfs/inode.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b904c74f31fd..3b327c8cfb16 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -10547,10 +10547,13 @@ static const struct file_operations btrfs_dir_file_operations = {
};
static const struct extent_io_ops btrfs_extent_io_ops = {
- .fill_delalloc = run_delalloc_range,
+ /* mandatory callbacks */
.submit_bio_hook = btrfs_submit_bio_hook,
- .merge_bio_hook = btrfs_merge_bio_hook,
.readpage_end_io_hook = btrfs_readpage_end_io_hook,
+ .merge_bio_hook = btrfs_merge_bio_hook,
+
+ /* optional callbacks */
+ .fill_delalloc = run_delalloc_range,
.writepage_end_io_hook = btrfs_writepage_end_io_hook,
.writepage_start_hook = btrfs_writepage_start_hook,
.set_bit_hook = btrfs_set_bit_hook,