On Mon, Oct 09, 2017 at 01:10:01AM +0900, Masahiro Yamada wrote:

<...>
>
> By splitting out the radix_tree_root definition,
> we can reduce the header file dependency.
>
> Reducing the header dependency will help for speeding the kernel
> build, suppressing unnecessary recompile of objects during
> git-bisect'ing, etc.

If we judge by the diffstat of this series, there won't be any
visible change in anything mentioned above.

<...>

>
> Masahiro Yamada (12):
>   radix-tree: replace <linux/spinlock.h> with <linux/spinlock_types.h>
>   radix-tree: split struct radix_tree_root to <linux/radix-tree-root.h>
>   irqdomain: replace <linux/radix-tree.h> with <linux/radix-tree-root.h>
>   writeback: replace <linux/radix-tree.h> with <linux/radix-tree-root.h>
>   iocontext.h: replace <linux/radix-tree.h> with
>     <linux/radix-tree-root.h>
>   fs: replace <linux/radix-tree.h> with <linux/radix-tree-root.h>
>   blkcg: replace <linux/radix-tree.h> with <linux/radix-tree-root.h>
>   fscache: include <linux-radix-tree.h>
>   sh: intc: replace <linux/radix-tree.h> with <linux/radix-tree-root.h>
>   net/mlx4: replace <linux/radix-tree.h> with <linux/radix-tree-root.h>
>   net/mlx5: replace <linux/radix-tree.h> with <linux/radix-tree-root.h>
>   drm/i915: replace <linux/radix-tree.h> with <linux/radix-tree-root.h>
>
>  drivers/gpu/drm/i915/i915_gem.c            |  1 +
>  drivers/gpu/drm/i915/i915_gem_context.c    |  1 +
>  drivers/gpu/drm/i915/i915_gem_context.h    |  2 +-
>  drivers/gpu/drm/i915/i915_gem_execbuffer.c |  1 +
>  drivers/gpu/drm/i915/i915_gem_object.h     |  1 +
>  drivers/net/ethernet/mellanox/mlx4/cq.c    |  1 +
>  drivers/net/ethernet/mellanox/mlx4/mlx4.h  |  2 +-
>  drivers/net/ethernet/mellanox/mlx4/qp.c    |  1 +
>  drivers/net/ethernet/mellanox/mlx4/srq.c   |  1 +
>  drivers/sh/intc/internals.h                |  2 +-
>  include/linux/backing-dev-defs.h           |  2 +-
>  include/linux/blk-cgroup.h                 |  2 +-
>  include/linux/fs.h                         |  2 +-
>  include/linux/fscache.h                    |  1 +
>  include/linux/iocontext.h                  |  2 +-
>  include/linux/irqdomain.h                  |  2 +-
>  include/linux/mlx4/device.h                |  2 +-
>  include/linux/mlx4/qp.h                    |  1 +
>  include/linux/mlx5/driver.h                |  2 +-
>  include/linux/mlx5/qp.h                    |  1 +
>  include/linux/radix-tree-root.h            | 24 ++++++++++++++++++++++++
>  include/linux/radix-tree.h                 |  8 ++------
>  22 files changed, 46 insertions(+), 16 deletions(-)
>  create mode 100644 include/linux/radix-tree-root.h
>
> --
> 2.7.4
>