mm/mapping_dirty_helpers: update huge page-table entry callbacks

	return 0;

}

/* wp_clean_pmd_entry - The pagewalk pmd callback. */

/*

 * wp_clean_pmd_entry - The pagewalk pmd callback.

 *

 * Dirty-tracking should take place on the PTE level, so

 * WARN() if encountering a dirty huge pmd.

 * Furthermore, never split huge pmds, since that currently

 * causes dirty info loss. The pagefault handler should do

 * that if needed.

 */

static int wp_clean_pmd_entry(pmd_t *pmd, unsigned long addr, unsigned long end,

			      struct mm_walk *walk)

{

	/* Dirty-tracking should be handled on the pte level */

	pmd_t pmdval = pmd_read_atomic(pmd);

	if (!pmd_trans_unstable(&pmdval))

		return 0;

	if (pmd_none(pmdval)) {

		walk->action = ACTION_AGAIN;

		return 0;

	}

	/* Huge pmd, present or migrated */

	walk->action = ACTION_CONTINUE;

	if (pmd_trans_huge(pmdval) || pmd_devmap(pmdval))

		WARN_ON(pmd_write(pmdval) || pmd_dirty(pmdval));

	return 0;

}

/* wp_clean_pud_entry - The pagewalk pud callback. */

/*

 * wp_clean_pud_entry - The pagewalk pud callback.

 *

 * Dirty-tracking should take place on the PTE level, so

 * WARN() if encountering a dirty huge puds.

 * Furthermore, never split huge puds, since that currently

 * causes dirty info loss. The pagefault handler should do

 * that if needed.

 */

static int wp_clean_pud_entry(pud_t *pud, unsigned long addr, unsigned long end,

			      struct mm_walk *walk)

{

	/* Dirty-tracking should be handled on the pte level */

	pud_t pudval = READ_ONCE(*pud);

	if (!pud_trans_unstable(&pudval))

		return 0;

	if (pud_none(pudval)) {

		walk->action = ACTION_AGAIN;

		return 0;

	}

	/* Huge pud */

	walk->action = ACTION_CONTINUE;

	if (pud_trans_huge(pudval) || pud_devmap(pudval))

		WARN_ON(pud_write(pudval) || pud_dirty(pudval));