[PATCH 28/28] radix-tree.h: move declarations to radix-tree_types.h

[Max Kellermann <max.kellermann@ionos.com>]

By providing declarations in a lean header, we can reduce header
dependencies.

Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
---
 drivers/usb/cdns3/cdnsp-mem.c    |  1 +
 include/linux/backing-dev-defs.h |  2 +-
 include/linux/iocontext.h        |  2 +-
 include/linux/irqdomain.h        |  2 +-
 include/linux/mlx4/device.h      |  2 +-
 include/linux/radix-tree.h       | 44 +---------------------------
 include/linux/radix-tree_types.h | 50 ++++++++++++++++++++++++++++++++
 kernel/dma/debug.c               |  1 +
 kernel/irq/irqdomain.c           |  1 +
 9 files changed, 58 insertions(+), 47 deletions(-)
 create mode 100644 include/linux/radix-tree_types.h

diff --git a/drivers/usb/cdns3/cdnsp-mem.c b/drivers/usb/cdns3/cdnsp-mem.c
index 97866bfb2da9..bab13f8a0b62 100644
--- a/drivers/usb/cdns3/cdnsp-mem.c
+++ b/drivers/usb/cdns3/cdnsp-mem.c
@@ -12,6 +12,7 @@
 
 #include <linux/dma-mapping.h>
 #include <linux/dmapool.h>
+#include <linux/radix-tree.h>
 #include <linux/slab.h>
 #include <linux/usb.h>
 
diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h
index ffdd82f2f3e6..a48509f21b71 100644
--- a/include/linux/backing-dev-defs.h
+++ b/include/linux/backing-dev-defs.h
@@ -3,7 +3,7 @@
 #define __LINUX_BACKING_DEV_DEFS_H
 
 #include <linux/list.h>
-#include <linux/radix-tree.h>
+#include <linux/radix-tree_types.h>
 #include <linux/rbtree_types.h>
 #include <linux/spinlock_types.h>
 #include <linux/percpu_counter_types.h>
diff --git a/include/linux/iocontext.h b/include/linux/iocontext.h
index a05d8a45cce5..aa1409bd9edd 100644
--- a/include/linux/iocontext.h
+++ b/include/linux/iocontext.h
@@ -2,7 +2,7 @@
 #ifndef IOCONTEXT_H
 #define IOCONTEXT_H
 
-#include <linux/radix-tree.h>
+#include <linux/radix-tree_types.h>
 #include <linux/rcupdate.h>
 #include <linux/workqueue_types.h>
 
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 0503bd4ea55b..c439d47b37a9 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -35,7 +35,7 @@
 #include <linux/irqhandler.h>
 #include <linux/of.h>
 #include <linux/mutex_types.h>
-#include <linux/radix-tree.h>
+#include <linux/radix-tree_types.h>
 
 struct device_node;
 struct fwnode_handle;
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 18d71b808bc2..e354c967a21d 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -37,7 +37,7 @@
 #include <linux/if_ether.h>
 #include <linux/pci.h>
 #include <linux/completion_types.h>
-#include <linux/radix-tree.h>
+#include <linux/radix-tree_types.h>
 #include <linux/cpu_rmap.h>
 #include <linux/crash_dump.h>
 
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index 231c526ec9b8..eb28f5be02cd 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -8,6 +8,7 @@
 #ifndef _LINUX_RADIX_TREE_H
 #define _LINUX_RADIX_TREE_H
 
+#include <linux/radix-tree_types.h>
 #include <linux/bitops.h>
 #include <linux/gfp_types.h>
 #include <linux/list.h>
@@ -20,10 +21,6 @@
 #include <linux/xarray.h>
 #include <linux/local_lock.h>
 
-/* Keep unconverted code working */
-#define radix_tree_root		xarray
-#define radix_tree_node		xa_node
-
 struct radix_tree_preload {
 	local_lock_t lock;
 	unsigned nr;
@@ -70,45 +67,6 @@ static inline bool radix_tree_is_internal_node(void *ptr)
 #define RADIX_TREE_MAX_PATH (DIV_ROUND_UP(RADIX_TREE_INDEX_BITS, \
 					  RADIX_TREE_MAP_SHIFT))
 
-/* The IDR tag is stored in the low bits of xa_flags */
-#define ROOT_IS_IDR	((__force gfp_t)4)
-/* The top bits of xa_flags are used to store the root tags */
-#define ROOT_TAG_SHIFT	(__GFP_BITS_SHIFT)
-
-#define RADIX_TREE_INIT(name, mask)	XARRAY_INIT(name, mask)
-
-#define RADIX_TREE(name, mask) \
-	struct radix_tree_root name = RADIX_TREE_INIT(name, mask)
-
-#define INIT_RADIX_TREE(root, mask) xa_init_flags(root, mask)
-
-static inline bool radix_tree_empty(const struct radix_tree_root *root)
-{
-	return root->xa_head == NULL;
-}
-
-/**
- * struct radix_tree_iter - radix tree iterator state
- *
- * @index:	index of current slot
- * @next_index:	one beyond the last index for this chunk
- * @tags:	bit-mask for tag-iterating
- * @node:	node that contains current slot
- *
- * This radix tree iterator works in terms of "chunks" of slots.  A chunk is a
- * subinterval of slots contained within one radix tree leaf node.  It is
- * described by a pointer to its first slot and a struct radix_tree_iter
- * which holds the chunk's position in the tree and its size.  For tagged
- * iteration radix_tree_iter also holds the slots' bit-mask for one chosen
- * radix tree tag.
- */
-struct radix_tree_iter {
-	unsigned long	index;
-	unsigned long	next_index;
-	unsigned long	tags;
-	struct radix_tree_node *node;
-};
-
 /**
  * Radix-tree synchronization
  *
diff --git a/include/linux/radix-tree_types.h b/include/linux/radix-tree_types.h
new file mode 100644
index 000000000000..d0d4e051a424
--- /dev/null
+++ b/include/linux/radix-tree_types.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef _LINUX_RADIX_TREE_TYPES_H
+#define _LINUX_RADIX_TREE_TYPES_H
+
+#include <linux/xarray_types.h>
+
+/* Keep unconverted code working */
+#define radix_tree_root		xarray
+#define radix_tree_node		xa_node
+
+#define RADIX_TREE_INIT(name, mask)	XARRAY_INIT(name, mask)
+
+#define RADIX_TREE(name, mask) \
+	struct radix_tree_root name = RADIX_TREE_INIT(name, mask)
+
+#define INIT_RADIX_TREE(root, mask) xa_init_flags(root, mask)
+
+static inline bool radix_tree_empty(const struct radix_tree_root *root)
+{
+	return root->xa_head == NULL;
+}
+
+/**
+ * struct radix_tree_iter - radix tree iterator state
+ *
+ * @index:	index of current slot
+ * @next_index:	one beyond the last index for this chunk
+ * @tags:	bit-mask for tag-iterating
+ * @node:	node that contains current slot
+ *
+ * This radix tree iterator works in terms of "chunks" of slots.  A chunk is a
+ * subinterval of slots contained within one radix tree leaf node.  It is
+ * described by a pointer to its first slot and a struct radix_tree_iter
+ * which holds the chunk's position in the tree and its size.  For tagged
+ * iteration radix_tree_iter also holds the slots' bit-mask for one chosen
+ * radix tree tag.
+ */
+struct radix_tree_iter {
+	unsigned long	index;
+	unsigned long	next_index;
+	unsigned long	tags;
+	struct radix_tree_node *node;
+};
+
+/* The IDR tag is stored in the low bits of xa_flags */
+#define ROOT_IS_IDR	((__force gfp_t)4)
+/* The top bits of xa_flags are used to store the root tags */
+#define ROOT_TAG_SHIFT	(__GFP_BITS_SHIFT)
+
+#endif /* _LINUX_RADIX_TREE_TYPES_H */
diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c
index a6e3792b15f8..4e6d802a2313 100644
--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -18,6 +18,7 @@
 #include <linux/uaccess.h>
 #include <linux/export.h>
 #include <linux/device.h>
+#include <linux/radix-tree.h>
 #include <linux/types.h>
 #include <linux/sched.h>
 #include <linux/ctype.h>
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 0bdef4fe925b..397efc4f2ae3 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -14,6 +14,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
+#include <linux/radix-tree.h>
 #include <linux/topology.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
-- 
2.39.2