btrfs: remove btrfs_bio::logical member

The member btrfs_bio::logical is only initialized by two call sites:

- btrfs_repair_one_sector()
  No corresponding site to utilize it.

- btrfs_submit_direct()
  The corresponding site to utilize it is btrfs_check_read_dio_bio().

However for btrfs_check_read_dio_bio(), we can grab the file_offset from
btrfs_dio_private::file_offset directly.

Thus it turns out we don't really need that btrfs_bio::logical member at
all.

For btrfs_bio, the logical bytenr can be fetched from its
bio->bi_iter.bi_sector directly.

So let's just remove the member to save 8 bytes for structure btrfs_bio.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 83075d6855db..49322a43593a 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -313,7 +313,6 @@ struct btrfs_bio {
 
 	/* @device is for stripe IO submission. */
 	struct btrfs_device *device;
-	u64 logical;
 	u8 *csum;
 	u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE];
 	struct bvec_iter iter;