static int get_pteptr()

in mm/pgtable.c [195:218]

• 23 lines of code
• 4 McCabe index (conditional complexity)

static int get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep)
{
	pgd_t	*pgd;
	p4d_t	*p4d;
	pud_t	*pud;
	pmd_t	*pmd;
	pte_t	*pte;
	int     retval = 0;

	pgd = pgd_offset(mm, addr & PAGE_MASK);
	if (pgd) {
		p4d = p4d_offset(pgd, addr & PAGE_MASK);
		pud = pud_offset(p4d, addr & PAGE_MASK);
		pmd = pmd_offset(pud, addr & PAGE_MASK);
		if (pmd_present(*pmd)) {
			pte = pte_offset_kernel(pmd, addr & PAGE_MASK);
			if (pte) {
				retval = 1;
				*ptep = pte;
			}
		}
	}
	return retval;
}