linux-kernel - [PATCH 04/13] rbtree: move some implementation details from rbtree.h to rbtree.c

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Date:	Mon,  9 Jul 2012 16:35:14 -0700
From:	Michel Lespinasse <walken@...gle.com>
To:	aarcange@...hat.com, dwmw2@...radead.org, riel@...hat.com,
	peterz@...radead.org, daniel.santos@...ox.com, axboe@...nel.dk,
	ebiederm@...ssion.com
Cc:	linux-mm@...ck.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org
Subject: [PATCH 04/13] rbtree: move some implementation details from rbtree.h to rbtree.c

rbtree users must use the documented APIs to manipulate the tree
structure.  Low-level helpers to manipulate node colors and parenthood
are not part of that API, so move them to lib/rbtree.c

Signed-off-by: Michel Lespinasse <walken@...gle.com>
---
 include/linux/rbtree.h |   16 ----------------
 lib/rbtree.c           |   18 ++++++++++++++++++
 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h
index 2049087..a06c044 100644
--- a/include/linux/rbtree.h
+++ b/include/linux/rbtree.h
@@ -35,8 +35,6 @@
 struct rb_node
 {
 	unsigned long  rb_parent_color;
-#define	RB_RED		0
-#define	RB_BLACK	1
 	struct rb_node *rb_right;
 	struct rb_node *rb_left;
 } __attribute__((aligned(sizeof(long))));
@@ -49,20 +47,6 @@ struct rb_root
 
 
 #define rb_parent(r)   ((struct rb_node *)((r)->rb_parent_color & ~3))
-#define rb_color(r)   ((r)->rb_parent_color & 1)
-#define rb_is_red(r)   (!rb_color(r))
-#define rb_is_black(r) rb_color(r)
-#define rb_set_red(r)  do { (r)->rb_parent_color &= ~1; } while (0)
-#define rb_set_black(r)  do { (r)->rb_parent_color |= 1; } while (0)
-
-static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
-{
-	rb->rb_parent_color = (rb->rb_parent_color & 3) | (unsigned long)p;
-}
-static inline void rb_set_color(struct rb_node *rb, int color)
-{
-	rb->rb_parent_color = (rb->rb_parent_color & ~1) | color;
-}
 
 #define RB_ROOT	(struct rb_root) { NULL, }
 #define	rb_entry(ptr, type, member) container_of(ptr, type, member)
diff --git a/lib/rbtree.c b/lib/rbtree.c
index fe43c8c..d0ec339 100644
--- a/lib/rbtree.c
+++ b/lib/rbtree.c
@@ -23,6 +23,24 @@
 #include <linux/rbtree.h>
 #include <linux/export.h>
 
+#define	RB_RED		0
+#define	RB_BLACK	1
+
+#define rb_color(r)   ((r)->rb_parent_color & 1)
+#define rb_is_red(r)   (!rb_color(r))
+#define rb_is_black(r) rb_color(r)
+#define rb_set_red(r)  do { (r)->rb_parent_color &= ~1; } while (0)
+#define rb_set_black(r)  do { (r)->rb_parent_color |= 1; } while (0)
+
+static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
+{
+	rb->rb_parent_color = (rb->rb_parent_color & 3) | (unsigned long)p;
+}
+static inline void rb_set_color(struct rb_node *rb, int color)
+{
+	rb->rb_parent_color = (rb->rb_parent_color & ~1) | color;
+}
+
 static void __rb_rotate_left(struct rb_node *node, struct rb_root *root)
 {
 	struct rb_node *right = node->rb_right;
-- 
1.7.7.3

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