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authorHans Reiser <reiser@namesys.com>2005-11-07 00:59:29 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:37 -0800
commita43313668f62a06e14c915b8c8994fc8a1257394 (patch)
treeae02e1ae145b3f277ead948c32b8b6d06a4e23d9 /include
parent7361f4d8ca65d23a18ba009b4484612183332c2f (diff)
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op-kernel-dev-a43313668f62a06e14c915b8c8994fc8a1257394.tar.gz
[PATCH] reiser4: add radix_tree_lookup_slot()
Reiser4 uses radix trees to solve a trouble reiser4_readdir has serving nfs requests. Unfortunately, radix tree api lacks an operation suitable for modifying existing entry. This patch adds radix_tree_lookup_slot which returns pointer to found item within the tree. That location can be then updated. Both Nick and Christoph Lameter have patches which need this as well. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/radix-tree.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index 9f0f928..36e5d26 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -46,6 +46,7 @@ do { \
int radix_tree_insert(struct radix_tree_root *, unsigned long, void *);
void *radix_tree_lookup(struct radix_tree_root *, unsigned long);
+void **radix_tree_lookup_slot(struct radix_tree_root *, unsigned long);
void *radix_tree_delete(struct radix_tree_root *, unsigned long);
unsigned int
radix_tree_gang_lookup(struct radix_tree_root *root, void **results,
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