pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
pmd_alloc_one (struct mm_struct *mm, unsigned long addr){	pmd_t *pmd = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);	return pmd;}