btrfs: Remove root argument from btrfs_log_dentry_safe

Now that nothing uses the root arg of btrfs_log_dentry_safe it can be
safely removed. No functional changes.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/file.c

@@ -2214,7 +2214,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 	}
 	trans->sync = true;
 
-	ret = btrfs_log_dentry_safe(trans, root, dentry, start, end, &ctx);
+	ret = btrfs_log_dentry_safe(trans, dentry, start, end, &ctx);
 	if (ret < 0) {
 		/* Fallthrough and commit/free transaction. */
 		ret = 1;

fs/btrfs/tree-log.c

@@ -5678,7 +5678,7 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
  * data on disk.
  */
 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
-			  struct btrfs_root *root, struct dentry *dentry,
+			  struct dentry *dentry,
 			  const loff_t start,
 			  const loff_t end,
 			  struct btrfs_log_ctx *ctx)

fs/btrfs/tree-log.h

@@ -65,7 +65,7 @@ int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
 			     struct btrfs_fs_info *fs_info);
 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
-			  struct btrfs_root *root, struct dentry *dentry,
+			  struct dentry *dentry,
 			  const loff_t start,
 			  const loff_t end,
 			  struct btrfs_log_ctx *ctx);