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Subject[PATCH 4/6] rbtree: Introduce rb_for_each_entry
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

Similar to list_for_each_entry, helps reducing boilerplate in many
places and makes rbtrees closer to list.h macros.

First conversion will be in the tools/perf.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
include/linux/rbtree.h | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h
index 9c29541..044b150 100644
--- a/include/linux/rbtree.h
+++ b/include/linux/rbtree.h
@@ -158,4 +158,16 @@ static inline void rb_link_node(struct rb_node * node, struct rb_node * parent,
*rb_link = node;
}

+/**
+ * rb_for_each_entry - iterate over rbtree of given type
+ * @pos: the type * to hold the current entry being traversed
+ * @node: the rb_node to hold the current entry being traversed
+ * @root: the root for your tree.
+ * @member: the name of the rb_node within the struct.
+ */
+#define rb_for_each_entry(pos, node, root, member) \
+ for (node = rb_first(root); \
+ node && (pos = rb_entry(node, typeof(*pos), member)); \
+ node = rb_next(node))
+
#endif /* _LINUX_RBTREE_H */
--
1.6.2.5
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