diff options
| -rw-r--r-- | lib/radix-tree.c | 57 |
1 files changed, 26 insertions, 31 deletions
diff --git a/lib/radix-tree.c b/lib/radix-tree.c index 88511c3805a..1403e2c8bb3 100644 --- a/lib/radix-tree.c +++ b/lib/radix-tree.c @@ -152,6 +152,20 @@ static inline int tag_get(struct radix_tree_node *node, int tag, int offset) } /* + * Returns 1 if any slot in the node has this tag set. + * Otherwise returns 0. + */ +static inline int any_tag_set(struct radix_tree_node *node, int tag) +{ + int idx; + for (idx = 0; idx < RADIX_TREE_TAG_LONGS; idx++) { + if (node->tags[tag][idx]) + return 1; + } + return 0; +} + +/* * Return the maximum key which can be store into a * radix tree with height HEIGHT. */ @@ -185,15 +199,9 @@ static int radix_tree_extend(struct radix_tree_root *root, unsigned long index) * into the newly-pushed top-level node(s) */ for (tag = 0; tag < RADIX_TREE_TAGS; tag++) { - int idx; - tags[tag] = 0; - for (idx = 0; idx < RADIX_TREE_TAG_LONGS; idx++) { - if (root->rnode->tags[tag][idx]) { - tags[tag] = 1; - break; - } - } + if (any_tag_set(root->rnode, tag)) + tags[tag] = 1; } do { @@ -427,13 +435,9 @@ void *radix_tree_tag_clear(struct radix_tree_root *root, goto out; do { - int idx; - tag_clear(pathp->node, tag, pathp->offset); - for (idx = 0; idx < RADIX_TREE_TAG_LONGS; idx++) { - if (pathp->node->tags[tag][idx]) - goto out; - } + if (any_tag_set(pathp->node, tag)) + goto out; pathp--; } while (pathp->node); out: @@ -729,19 +733,14 @@ void *radix_tree_delete(struct radix_tree_root *root, unsigned long index) nr_cleared_tags = RADIX_TREE_TAGS; for (tag = 0; tag < RADIX_TREE_TAGS; tag++) { - int idx; - if (tags[tag]) continue; tag_clear(pathp->node, tag, pathp->offset); - for (idx = 0; idx < RADIX_TREE_TAG_LONGS; idx++) { - if (pathp->node->tags[tag][idx]) { - tags[tag] = 1; - nr_cleared_tags--; - break; - } + if (any_tag_set(pathp->node, tag)) { + tags[tag] = 1; + nr_cleared_tags--; } } pathp--; @@ -770,15 +769,11 @@ EXPORT_SYMBOL(radix_tree_delete); */ int radix_tree_tagged(struct radix_tree_root *root, int tag) { - int idx; - - if (!root->rnode) - return 0; - for (idx = 0; idx < RADIX_TREE_TAG_LONGS; idx++) { - if (root->rnode->tags[tag][idx]) - return 1; - } - return 0; + struct radix_tree_node *rnode; + rnode = root->rnode; + if (!rnode) + return 0; + return any_tag_set(rnode, tag); } EXPORT_SYMBOL(radix_tree_tagged); |