On Tue, 10 Jul 2012 01:35:14 +0200, Michel Lespinasse <walken@xxxxxxxxxx> wrote:
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@xxxxxxxxxx>
---
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
Interestingly, those are almost never used. RB_BLACK is used only once.
Should we get rid of those instead? Or change the code (like rb_is_red())
to use them?
+
+#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;
--
Best regards, _ _
.o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o
..o | Computer Science, Michał “mina86” Nazarewicz (o o)
ooo +----<email/xmpp: mpn@xxxxxxxxxx>--------------ooO--(_)--Ooo--
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href