prio_tree: remove

After both prio_tree users have been converted to use red-black trees,
there is no need to keep around the prio tree library anymore.

Signed-off-by: Michel Lespinasse <walken@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 120 deletions

diff --git a/include/linux/prio_tree.h b/include/linux/prio_tree.h
deleted file mode 100644
index db04abb557e0..000000000000
--- a/include/linux/prio_tree.h
+++ /dev/null
@@ -1,120 +0,0 @@
-#ifndef _LINUX_PRIO_TREE_H
-#define _LINUX_PRIO_TREE_H
-
-/*
- * K&R 2nd ed. A8.3 somewhat obliquely hints that initial sequences of struct
- * fields with identical types should end up at the same location. We'll use
- * this until we can scrap struct raw_prio_tree_node.
- *
- * Note: all this could be done more elegantly by using unnamed union/struct
- * fields. However, gcc 2.95.3 and apparently also gcc 3.0.4 don't support this
- * language extension.
- */
-
-struct raw_prio_tree_node {
-	struct prio_tree_node	*left;
-	struct prio_tree_node	*right;
-	struct prio_tree_node	*parent;
-};
-
-struct prio_tree_node {
-	struct prio_tree_node	*left;
-	struct prio_tree_node	*right;
-	struct prio_tree_node	*parent;
-	unsigned long		start;
-	unsigned long		last;	/* last location _in_ interval */
-};
-
-struct prio_tree_root {
-	struct prio_tree_node	*prio_tree_node;
-	unsigned short 		index_bits;
-	unsigned short		raw;
-		/*
-		 * 0: nodes are of type struct prio_tree_node
-		 * 1: nodes are of type raw_prio_tree_node
-		 */
-};
-
-struct prio_tree_iter {
-	struct prio_tree_node	*cur;
-	unsigned long		mask;
-	unsigned long		value;
-	int			size_level;
-
-	struct prio_tree_root	*root;
-	pgoff_t			r_index;
-	pgoff_t			h_index;
-};
-
-static inline void prio_tree_iter_init(struct prio_tree_iter *iter,
-		struct prio_tree_root *root, pgoff_t r_index, pgoff_t h_index)
-{
-	iter->root = root;
-	iter->r_index = r_index;
-	iter->h_index = h_index;
-	iter->cur = NULL;
-}
-
-#define __INIT_PRIO_TREE_ROOT(ptr, _raw)	\
-do {					\
-	(ptr)->prio_tree_node = NULL;	\
-	(ptr)->index_bits = 1;		\
-	(ptr)->raw = (_raw);		\
-} while (0)
-
-#define INIT_PRIO_TREE_ROOT(ptr)	__INIT_PRIO_TREE_ROOT(ptr, 0)
-#define INIT_RAW_PRIO_TREE_ROOT(ptr)	__INIT_PRIO_TREE_ROOT(ptr, 1)
-
-#define INIT_PRIO_TREE_NODE(ptr)				\
-do {								\
-	(ptr)->left = (ptr)->right = (ptr)->parent = (ptr);	\
-} while (0)
-
-#define INIT_PRIO_TREE_ITER(ptr)	\
-do {					\
-	(ptr)->cur = NULL;		\
-	(ptr)->mask = 0UL;		\
-	(ptr)->value = 0UL;		\
-	(ptr)->size_level = 0;		\
-} while (0)
-
-#define prio_tree_entry(ptr, type, member) \
-       ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
-
-static inline int prio_tree_empty(const struct prio_tree_root *root)
-{
-	return root->prio_tree_node == NULL;
-}
-
-static inline int prio_tree_root(const struct prio_tree_node *node)
-{
-	return node->parent == node;
-}
-
-static inline int prio_tree_left_empty(const struct prio_tree_node *node)
-{
-	return node->left == node;
-}
-
-static inline int prio_tree_right_empty(const struct prio_tree_node *node)
-{
-	return node->right == node;
-}
-
-
-struct prio_tree_node *prio_tree_replace(struct prio_tree_root *root,
-                struct prio_tree_node *old, struct prio_tree_node *node);
-struct prio_tree_node *prio_tree_insert(struct prio_tree_root *root,
-                struct prio_tree_node *node);
-void prio_tree_remove(struct prio_tree_root *root, struct prio_tree_node *node);
-struct prio_tree_node *prio_tree_next(struct prio_tree_iter *iter);
-
-#define raw_prio_tree_replace(root, old, node) \
-	prio_tree_replace(root, (struct prio_tree_node *) (old), \
-	    (struct prio_tree_node *) (node))
-#define raw_prio_tree_insert(root, node) \
-	prio_tree_insert(root, (struct prio_tree_node *) (node))
-#define raw_prio_tree_remove(root, node) \
-	prio_tree_remove(root, (struct prio_tree_node *) (node))
-
-#endif /* _LINUX_PRIO_TREE_H */