rbtree: move augmented rbtree functionality to rbtree_augmented.h

Provide rb_insert_augmented() and rb_erase_augmented() through a new
rbtree_augmented.h include file.  rb_erase_augmented() is defined there as
an __always_inline function, in order to allow inlining of augmented
rbtree callbacks into it.  Since this generates a relatively large
function, each augmented rbtree user should make sure to have a single
call site.

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, 6 insertions, 2 deletions

diff --git a/include/linux/interval_tree_tmpl.h b/include/linux/interval_tree_tmpl.h
index c65deda31413..c1aeb922d65f 100644
--- a/include/linux/interval_tree_tmpl.h
+++ b/include/linux/interval_tree_tmpl.h
@@ -19,6 +19,8 @@
   include/linux/interval_tree_tmpl.h
 */
 
+#include <linux/rbtree_augmented.h>
+
 /*
  * Template for implementing interval trees
  *
@@ -57,7 +59,8 @@ static inline ITTYPE IT(compute_subtree_last)(ITSTRUCT *node)
 	return max;
 }
 
-static void IT(augment_propagate)(struct rb_node *rb, struct rb_node *stop)
+static inline void
+IT(augment_propagate)(struct rb_node *rb, struct rb_node *stop)
 {
 	while (rb != stop) {
 		ITSTRUCT *node = rb_entry(rb, ITSTRUCT, ITRB);
@@ -69,7 +72,8 @@ static void IT(augment_propagate)(struct rb_node *rb, struct rb_node *stop)
 	}
 }
 
-static void IT(augment_copy)(struct rb_node *rb_old, struct rb_node *rb_new)
+static inline void
+IT(augment_copy)(struct rb_node *rb_old, struct rb_node *rb_new)
 {
 	ITSTRUCT *old = rb_entry(rb_old, ITSTRUCT, ITRB);
 	ITSTRUCT *new = rb_entry(rb_new, ITSTRUCT, ITRB);