Btrfs: don't set for_cow parameter for tree block functions

Three callers of btrfs_free_tree_block or btrfs_alloc_tree_block passed
parameter for_cow = 1. In fact, these two functions should never mark
their tree modification operations as for_cow, because they can change
the number of blocks referenced by a tree.

Hence, we remove the extra for_cow parameter from these functions and
make them pass a zero down.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>

1 files changed, 5 insertions, 5 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 49fd7b66d57b..b68eb7ad05a7 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5217,7 +5217,7 @@ out:
 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
                            struct btrfs_root *root,
                            struct extent_buffer *buf,
-                           u64 parent, int last_ref, int for_cow)
+                           u64 parent, int last_ref)
 {
         struct btrfs_block_group_cache *cache = NULL;
         int ret;
@@ -5227,7 +5227,7 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
                                         buf->start, buf->len,
                                         parent, root->root_key.objectid,
                                         btrfs_header_level(buf),
-                                        BTRFS_DROP_DELAYED_REF, NULL, for_cow);
+                                        BTRFS_DROP_DELAYED_REF, NULL, 0);
                 BUG_ON(ret); /* -ENOMEM */
         }
 
@@ -6249,7 +6249,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
                                         struct btrfs_root *root, u32 blocksize,
                                         u64 parent, u64 root_objectid,
                                         struct btrfs_disk_key *key, int level,
-                                        u64 hint, u64 empty_size, int for_cow)
+                                        u64 hint, u64 empty_size)
 {
         struct btrfs_key ins;
         struct btrfs_block_rsv *block_rsv;
@@ -6297,7 +6297,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
                                         ins.objectid,
                                         ins.offset, parent, root_objectid,
                                         level, BTRFS_ADD_DELAYED_EXTENT,
-                                        extent_op, for_cow);
+                                        extent_op, 0);
                 BUG_ON(ret); /* -ENOMEM */
         }
         return buf;
@@ -6715,7 +6715,7 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans,
                                btrfs_header_owner(path->nodes[level + 1]));
         }
 
-        btrfs_free_tree_block(trans, root, eb, parent, wc->refs[level] == 1, 0);
+        btrfs_free_tree_block(trans, root, eb, parent, wc->refs[level] == 1);
 out:
         wc->refs[level] = 0;
         wc->flags[level] = 0;