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radix-tree: Chain preallocated nodes through ->parent

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Chaining through the ->private_data member means we have to zero
->private_data after removing preallocated nodes from the list.
We're about to initialise ->parent anyway, so we can avoid zeroing it.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
This commit is contained in:
Matthew Wilcox 2017-01-16 16:41:29 -05:00
parent 73bc029b76
commit 1293d5c5f5
2 changed files with 7 additions and 8 deletions
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6
tools/testing/radix-tree/linux.c
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@ -35,9 +35,9 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, int flags)
if (cachep->nr_objs) {
cachep->nr_objs--;
node = cachep->objs;
cachep->objs = node->private_data;
cachep->objs = node->parent;
pthread_mutex_unlock(&cachep->lock);
node->private_data = NULL;
node->parent = NULL;
} else {
pthread_mutex_unlock(&cachep->lock);
node = malloc(cachep->size);
@ -64,7 +64,7 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
} else {
struct radix_tree_node *node = objp;
cachep->nr_objs++;
node->private_data = cachep->objs;
node->parent = cachep->objs;
cachep->objs = node;
}
pthread_mutex_unlock(&cachep->lock);