write_debugfs
write_debugfs(PID_FMT, getpid(), (uint64_t)one_page,
write_debugfs(PID_FMT, getpid(), (uint64_t)one_page,
write_debugfs(PID_FMT, getpid(), (uint64_t)page_area,
write_debugfs(PATH_FMT, testfile, pgoff_start, pgoff_end, order);
write_debugfs(PID_FMT, getpid(), (uint64_t)split_addr,
write_debugfs(PID_FMT_OFFSET, getpid(), (uint64_t)split_addr,