[PATCH 09/13] btrfs: update insert_ref_entry to to use rb helper

[Yangtao Li <frank.li@vivo.com>]

Update insert_ref_entry() to use rb_find_add().

Suggested-by: David Sterba <dsterba@suse.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 fs/btrfs/ref-verify.c | 31 +++++++++++--------------------
 1 file changed, 11 insertions(+), 20 deletions(-)

diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c
index 140b036b5c80..1de15586ecc2 100644
--- a/fs/btrfs/ref-verify.c
+++ b/fs/btrfs/ref-verify.c
@@ -165,30 +165,21 @@ static int comp_refs(struct ref_entry *ref1, struct ref_entry *ref2)
 	return 0;
 }
 
+static int ref_entry_cmp(struct rb_node *new, const struct rb_node *exist)
+{
+	struct ref_entry *new_entry = rb_entry(new, struct ref_entry, node);
+	struct ref_entry *exist_entry = rb_entry(exist, struct ref_entry, node);
+
+	return comp_refs(new_entry, exist_entry);
+}
+
 static struct ref_entry *insert_ref_entry(struct rb_root *root,
 					  struct ref_entry *ref)
 {
-	struct rb_node **p = &root->rb_node;
-	struct rb_node *parent_node = NULL;
-	struct ref_entry *entry;
-	int cmp;
-
-	while (*p) {
-		parent_node = *p;
-		entry = rb_entry(parent_node, struct ref_entry, node);
-		cmp = comp_refs(entry, ref);
-		if (cmp > 0)
-			p = &(*p)->rb_left;
-		else if (cmp < 0)
-			p = &(*p)->rb_right;
-		else
-			return entry;
-	}
-
-	rb_link_node(&ref->node, parent_node, p);
-	rb_insert_color(&ref->node, root);
-	return NULL;
+	struct rb_node *exist;
 
+	exist = rb_find_add(&ref->node, root, ref_entry_cmp);
+	return rb_entry_safe(exist, struct ref_entry, node);
 }
 
 static struct root_entry *lookup_root_entry(struct rb_root *root, u64 objectid)
-- 
2.39.0