btrfs: remove root argument from btrfs_del_dir_entries_in_log()

There's no need to pass the root as we can extract it from the directory
inode, so remove it.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: fdmanana

fs/btrfs/inode.c

@@ -4363,7 +4363,7 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans,
 	 */
 	if (!rename_ctx) {
 		btrfs_del_inode_ref_in_log(trans, root, name, inode, dir_ino);
-		btrfs_del_dir_entries_in_log(trans, root, name, dir, index);
+		btrfs_del_dir_entries_in_log(trans, name, dir, index);
 	}
 
 	/*

fs/btrfs/tree-log.c

@@ -3900,10 +3900,10 @@ static int del_logged_dentry(struct btrfs_trans_handle *trans,
  * or the entire directory.
  */
 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
-				  struct btrfs_root *root,
 				  const struct fscrypt_str *name,
 				  struct btrfs_inode *dir, u64 index)
 {
+	struct btrfs_root *root = dir->root;
 	BTRFS_PATH_AUTO_FREE(path);
 	int ret;
 

fs/btrfs/tree-log.h

@@ -79,7 +79,6 @@ int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
 			  struct dentry *dentry,
 			  struct btrfs_log_ctx *ctx);
 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
-				  struct btrfs_root *root,
 				  const struct fscrypt_str *name,
 				  struct btrfs_inode *dir, u64 index);
 void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,