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| author | Paul Mundt <lethal@linux-sh.org> | 2010-05-20 11:57:38 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-05-20 11:57:38 +0900 |
| commit | ffee72d4681c8777918268a96aef42bdeb6c367b (patch) | |
| tree | 4baf91483886d561c198ed0524ab54b783273e86 /lib/radix-tree.c | |
| parent | fb54d268329846aa13b2bc44a64d90e9b7131192 (diff) | |
| parent | f72caf7e496465182eeda842ac66a5e75404ddf1 (diff) | |
| download | kernel_goldelico_gta04-ffee72d4681c8777918268a96aef42bdeb6c367b.zip kernel_goldelico_gta04-ffee72d4681c8777918268a96aef42bdeb6c367b.tar.gz kernel_goldelico_gta04-ffee72d4681c8777918268a96aef42bdeb6c367b.tar.bz2 | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'lib/radix-tree.c')
| -rw-r--r-- | lib/radix-tree.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/lib/radix-tree.c b/lib/radix-tree.c index 0871582..2a087e0 100644 --- a/lib/radix-tree.c +++ b/lib/radix-tree.c @@ -555,6 +555,10 @@ EXPORT_SYMBOL(radix_tree_tag_clear); * * 0: tag not present or not set * 1: tag set + * + * Note that the return value of this function may not be relied on, even if + * the RCU lock is held, unless tag modification and node deletion are excluded + * from concurrency. */ int radix_tree_tag_get(struct radix_tree_root *root, unsigned long index, unsigned int tag) @@ -595,12 +599,8 @@ int radix_tree_tag_get(struct radix_tree_root *root, */ if (!tag_get(node, tag, offset)) saw_unset_tag = 1; - if (height == 1) { - int ret = tag_get(node, tag, offset); - - BUG_ON(ret && saw_unset_tag); - return !!ret; - } + if (height == 1) + return !!tag_get(node, tag, offset); node = rcu_dereference_raw(node->slots[offset]); shift -= RADIX_TREE_MAP_SHIFT; height--; |