static inline unsigned long mmap_base(struct mm_struct *mm)
{
    unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
    unsigned long random_factor = 0;

    if (current->flags & PF_RANDOMIZE)
        random_factor = get_random_int() % (1024*1024);

    if (gap < MIN_GAP)
        gap = MIN_GAP;
    else if (gap > MAX_GAP)
        gap = MAX_GAP;

    return PAGE_ALIGN(TASK_SIZE - gap - random_factor);
}