[PATCH RFC 18/39] btrfs: Move alloc_backref_node() to backref.c

[Qu Wenruo <wqu@xxxxxxxx>]

Signed-off-by: Qu Wenruo <wqu@xxxxxxxx>
---
 fs/btrfs/backref.c    | 20 ++++++++++++++++++++
 fs/btrfs/backref.h    |  2 ++
 fs/btrfs/relocation.c | 20 --------------------
 3 files changed, 22 insertions(+), 20 deletions(-)

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 2f1a60760342..eb4a2b8dd282 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -2484,3 +2484,23 @@ void backref_cache_init(struct btrfs_fs_info *fs_info,
 	cache->fs_info = fs_info;
 	cache->is_reloc = is_reloc;
 }
+
+struct backref_node *alloc_backref_node(struct backref_cache *cache,
+					u64 bytenr, int level)
+{
+	struct backref_node *node;
+
+	ASSERT(level >= 0 && level < BTRFS_MAX_LEVEL);
+	node = kzalloc(sizeof(*node), GFP_NOFS);
+	if (!node)
+		return node;
+	INIT_LIST_HEAD(&node->list);
+	INIT_LIST_HEAD(&node->upper);
+	INIT_LIST_HEAD(&node->lower);
+	RB_CLEAR_NODE(&node->rb_node);
+	cache->nr_nodes++;
+
+	node->level = level;
+	node->bytenr = bytenr;
+	return node;
+}
diff --git a/fs/btrfs/backref.h b/fs/btrfs/backref.h
index 7c81fed555d7..ccb676ca685b 100644
--- a/fs/btrfs/backref.h
+++ b/fs/btrfs/backref.h
@@ -271,4 +271,6 @@ struct backref_cache {
 
 void backref_cache_init(struct btrfs_fs_info *fs_info,
 			struct backref_cache *cache, int is_reloc);
+struct backref_node *alloc_backref_node(struct backref_cache *cache,
+					u64 bytenr, int level);
 #endif
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 2e54251b9129..d946cdd07e31 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -215,26 +215,6 @@ static void backref_cache_cleanup(struct backref_cache *cache)
 	ASSERT(!cache->nr_edges);
 }
 
-static struct backref_node *alloc_backref_node(struct backref_cache *cache,
-						u64 bytenr, int level)
-{
-	struct backref_node *node;
-
-	ASSERT(level >= 0 && level < BTRFS_MAX_LEVEL);
-	node = kzalloc(sizeof(*node), GFP_NOFS);
-	if (!node)
-		return node;
-	INIT_LIST_HEAD(&node->list);
-	INIT_LIST_HEAD(&node->upper);
-	INIT_LIST_HEAD(&node->lower);
-	RB_CLEAR_NODE(&node->rb_node);
-	cache->nr_nodes++;
-
-	node->level = level;
-	node->bytenr = bytenr;
-	return node;
-}
-
 static void free_backref_node(struct backref_cache *cache,
 			      struct backref_node *node)
 {
-- 
2.25.1