pud = hugepgd_offset(mm, addr); if (! pud) return NULL; 
addr &= HPAGE_MASK; 
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr){	pud_t *pud;	BUG_ON(! in_hugepage_area(mm->context, addr));	pud = hugepgd_offset(mm, addr);	if (! pud)		return NULL;	return hugepte_offset(pud, addr);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/e28f7faf05159f1cfd564596f5e6178edba6bd49/hugetlbpage.c/buggy/arch/ppc64/mm/hugetlbpage.c