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authorMichel Lespinasse <walken@google.com>2012-10-08 16:31:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-09 16:22:38 +0900
commit3908836aa77e3621aaf2101f2920e01d7c8460d6 (patch)
tree3e8f5b619f9e093d9d53180bb6f496319ddeb946 /lib
parent9d9e6f9703bbd642f3f2f807e6aaa642a4cbcec9 (diff)
downloadvexpress-lsk-3908836aa77e3621aaf2101f2920e01d7c8460d6.tar.gz
rbtree: add RB_DECLARE_CALLBACKS() macro
As proposed by Peter Zijlstra, this makes it easier to define the augmented rbtree callbacks. Signed-off-by: Michel Lespinasse <walken@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> 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>
Diffstat (limited to 'lib')
-rw-r--r--lib/rbtree_test.c34
1 files changed, 2 insertions, 32 deletions
diff --git a/lib/rbtree_test.c b/lib/rbtree_test.c
index e28345df09b..b20e99969b0 100644
--- a/lib/rbtree_test.c
+++ b/lib/rbtree_test.c
@@ -61,38 +61,8 @@ static inline u32 augment_recompute(struct test_node *node)
return max;
}
-static void augment_propagate(struct rb_node *rb, struct rb_node *stop)
-{
- while (rb != stop) {
- struct test_node *node = rb_entry(rb, struct test_node, rb);
- u32 augmented = augment_recompute(node);
- if (node->augmented == augmented)
- break;
- node->augmented = augmented;
- rb = rb_parent(&node->rb);
- }
-}
-
-static void augment_copy(struct rb_node *rb_old, struct rb_node *rb_new)
-{
- struct test_node *old = rb_entry(rb_old, struct test_node, rb);
- struct test_node *new = rb_entry(rb_new, struct test_node, rb);
- new->augmented = old->augmented;
-}
-
-static void augment_rotate(struct rb_node *rb_old, struct rb_node *rb_new)
-{
- struct test_node *old = rb_entry(rb_old, struct test_node, rb);
- struct test_node *new = rb_entry(rb_new, struct test_node, rb);
-
- /* Rotation doesn't change subtree's augmented value */
- new->augmented = old->augmented;
- old->augmented = augment_recompute(old);
-}
-
-static const struct rb_augment_callbacks augment_callbacks = {
- augment_propagate, augment_copy, augment_rotate
-};
+RB_DECLARE_CALLBACKS(static, augment_callbacks, struct test_node, rb,
+ u32, augmented, augment_recompute)
static void insert_augmented(struct test_node *node, struct rb_root *root)
{