This is purely cosmetic, to make it straightforward to copy and paste
the definition and helpers from ctree.h into fs.h.  These are helpers
that act directly on the fs_info, and were scattered throughout ctree.h.
Move them directly below the fs_info definition to make it easier to
move them later.  This includes the exclop prototypes, which shares an
enum that's used in struct btrfs_fs_info as well.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>