drbd: use RB_DECLARE_CALLBACKS() to define augment callbacks

The original code are the same as RB_DECLARE_CALLBACKS().

CC: Michel Lespinasse <walken@google.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 2 insertions, 34 deletions

diff --git a/drivers/block/drbd/drbd_interval.c b/drivers/block/drbd/drbd_interval.c
index 04a14e0f8878..51b25ad85251 100644
--- a/drivers/block/drbd/drbd_interval.c
+++ b/drivers/block/drbd/drbd_interval.c
@@ -37,40 +37,8 @@ compute_subtree_last(struct drbd_interval *node)
         return max;
 }
 
-static void augment_propagate(struct rb_node *rb, struct rb_node *stop)
-{
-        while (rb != stop) {
-                struct drbd_interval *node = rb_entry(rb, struct drbd_interval, rb);
-                sector_t subtree_last = compute_subtree_last(node);
-                if (node->end == subtree_last)
-                        break;
-                node->end = subtree_last;
-                rb = rb_parent(&node->rb);
-        }
-}
-
-static void augment_copy(struct rb_node *rb_old, struct rb_node *rb_new)
-{
-        struct drbd_interval *old = rb_entry(rb_old, struct drbd_interval, rb);
-        struct drbd_interval *new = rb_entry(rb_new, struct drbd_interval, rb);
-
-        new->end = old->end;
-}
-
-static void augment_rotate(struct rb_node *rb_old, struct rb_node *rb_new)
-{
-        struct drbd_interval *old = rb_entry(rb_old, struct drbd_interval, rb);
-        struct drbd_interval *new = rb_entry(rb_new, struct drbd_interval, rb);
-
-        new->end = old->end;
-        old->end = compute_subtree_last(old);
-}
-
-static const struct rb_augment_callbacks augment_callbacks = {
-        augment_propagate,
-        augment_copy,
-        augment_rotate,
-};
+RB_DECLARE_CALLBACKS(static, augment_callbacks, struct drbd_interval, rb,
+                     sector_t, end, compute_subtree_last);
 
 /**
  * drbd_insert_interval  -  insert a new interval into a tree