file_user_path
nm = d_path(file_user_path(vma->vm_file), buf,
realfile = backing_file_open(file_user_path(file),
*path = *file_user_path(vma->vm_file);
seq_path(m, file_user_path(file), "");
seq_path(m, file_user_path(file), "\n\t= ");
*path = file_user_path(vma->vm_file);
seq_path(m, file_user_path(file), "");
name = d_path(file_user_path(file), buf, PATH_MAX - sizeof(u64));
ret = trace_seq_path(s, file_user_path(file));