From ebf8aa44beed48cd17893a83d92a4403e5f9d9e2 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Mon, 9 Aug 2010 17:19:11 -0700
Subject: radix-tree: omplement function radix_tree_range_tag_if_tagged

Implement function for setting one tag if another tag is set for each item
in given range.

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/radix-tree.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'include/linux/radix-tree.h')

diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index 55ca73cf25e5..a4b00e9cca90 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -192,6 +192,10 @@ unsigned int
 radix_tree_gang_lookup_tag_slot(struct radix_tree_root *root, void ***results,
 		unsigned long first_index, unsigned int max_items,
 		unsigned int tag);
+unsigned long radix_tree_range_tag_if_tagged(struct radix_tree_root *root,
+		unsigned long *first_indexp, unsigned long last_index,
+		unsigned long nr_to_tag,
+		unsigned int fromtag, unsigned int totag);
 int radix_tree_tagged(struct radix_tree_root *root, unsigned int tag);
 
 static inline void radix_tree_preload_end(void)
-- 
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