tomoyo_realpath_from_path
realpath = tomoyo_realpath_from_path(&file->f_path);
char *tomoyo_realpath_from_path(const struct path *path);
exe.name = tomoyo_realpath_from_path(&file->f_path);
exename.name = tomoyo_realpath_from_path(&bprm->file->f_path);
buf->name = tomoyo_realpath_from_path(path);
requested_dir_name = tomoyo_realpath_from_path(dir);
requested_dev_name = tomoyo_realpath_from_path(&path);
char *buf = tomoyo_realpath_from_path(&path);
cp = tomoyo_realpath_from_path(&exe_file->f_path);