C++ (Cpp) walk_pte_range Examples

Example #1

static int walk_pmd_range(pud_t *pud, unsigned long addr, unsigned long end,
                          struct mm_walk *walk)
{
    pmd_t *pmd;
    unsigned long next;
    int err = 0;

    pmd = pmd_offset(pud, addr);
    do {
        next = pmd_addr_end(addr, end);
        if (pmd_none_or_clear_bad(pmd)) {
            if (walk->pte_hole)
                err = walk->pte_hole(addr, next, walk);
            if (err)
                break;
            continue;
        }
        if (walk->pmd_entry)
            err = walk->pmd_entry(pmd, addr, next, walk);
        if (!err && walk->pte_entry)
            err = walk_pte_range(pmd, addr, next, walk);
        if (err)
            break;
    } while (pmd++, addr = next, addr != end);

    return err;
}

Example #2

File: pagewalk.c Project: 285452612/ali_kernel

static int walk_pmd_range(pud_t *pud, unsigned long addr, unsigned long end,
			  struct mm_walk *walk)
{
	pmd_t *pmd;
	unsigned long next;
	int err = 0;

	pmd = pmd_offset(pud, addr);
	do {
again:
		next = pmd_addr_end(addr, end);
		if (pmd_none(*pmd)) {
			if (walk->pte_hole)
				err = walk->pte_hole(addr, next, walk);
			if (err)
				break;
			continue;
		}
		/*
		 * This implies that each ->pmd_entry() handler
		 * needs to know about pmd_trans_huge() pmds
		 */
		if (walk->pmd_entry)
			err = walk->pmd_entry(pmd, addr, next, walk);
		if (err)
			break;

		/*
		 * Check this here so we only break down trans_huge
		 * pages when we _need_ to
		 */
		if (!walk->pte_entry)
			continue;

		split_huge_page_pmd(walk->mm, pmd);
		if (pmd_none_or_trans_huge_or_clear_bad(pmd))
			goto again;
		err = walk_pte_range(pmd, addr, next, walk);
		if (err)
			break;
	} while (pmd++, addr = next, addr != end);

	return err;
}