file_open_root
return file_open_root(&root, filename, flags, mode);
file = file_open_root(&root, cn->corename, open_flags, 0600);
return file_open_root(path, "", open_flag, 0);
file = file_open_root(&root, path, O_RDONLY, 0);
return file_open_root(path, "", oflags, 0);
EXPORT_SYMBOL(file_open_root);
extern struct file *file_open_root(const struct path *,
return file_open_root(&(struct path){.mnt = mnt, .dentry = mnt->mnt_root},