efivarfs_get_inode
inode = efivarfs_get_inode(dir->i_sb, dir, mode, 0, is_removable);
extern struct inode *efivarfs_get_inode(struct super_block *sb,
inode = efivarfs_get_inode(sb, d_inode(root), S_IFREG | 0644, 0,
inode = efivarfs_get_inode(sb, NULL, S_IFDIR | 0755, 0, true);