Revert "btrfs: remove BTRFS_INODE_READDIO_NEED_LOCK"

This reverts commit 5f008163a559d566a0ee1190a0a24f3eec6f1ea7.

The patch is a simplification after direct IO port to iomap
infrastructure, which gets reverted.

Signed-off-by: David Sterba <dsterba@suse.com>
2 files changed