162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */
262306a36Sopenharmony_ci#ifndef _LINUX_PGALLOC_TRACK_H
362306a36Sopenharmony_ci#define _LINUX_PGALLOC_TRACK_H
462306a36Sopenharmony_ci
562306a36Sopenharmony_ci#if defined(CONFIG_MMU)
662306a36Sopenharmony_cistatic inline p4d_t *p4d_alloc_track(struct mm_struct *mm, pgd_t *pgd,
762306a36Sopenharmony_ci				     unsigned long address,
862306a36Sopenharmony_ci				     pgtbl_mod_mask *mod_mask)
962306a36Sopenharmony_ci{
1062306a36Sopenharmony_ci	if (unlikely(pgd_none(*pgd))) {
1162306a36Sopenharmony_ci		if (__p4d_alloc(mm, pgd, address))
1262306a36Sopenharmony_ci			return NULL;
1362306a36Sopenharmony_ci		*mod_mask |= PGTBL_PGD_MODIFIED;
1462306a36Sopenharmony_ci	}
1562306a36Sopenharmony_ci
1662306a36Sopenharmony_ci	return p4d_offset(pgd, address);
1762306a36Sopenharmony_ci}
1862306a36Sopenharmony_ci
1962306a36Sopenharmony_cistatic inline pud_t *pud_alloc_track(struct mm_struct *mm, p4d_t *p4d,
2062306a36Sopenharmony_ci				     unsigned long address,
2162306a36Sopenharmony_ci				     pgtbl_mod_mask *mod_mask)
2262306a36Sopenharmony_ci{
2362306a36Sopenharmony_ci	if (unlikely(p4d_none(*p4d))) {
2462306a36Sopenharmony_ci		if (__pud_alloc(mm, p4d, address))
2562306a36Sopenharmony_ci			return NULL;
2662306a36Sopenharmony_ci		*mod_mask |= PGTBL_P4D_MODIFIED;
2762306a36Sopenharmony_ci	}
2862306a36Sopenharmony_ci
2962306a36Sopenharmony_ci	return pud_offset(p4d, address);
3062306a36Sopenharmony_ci}
3162306a36Sopenharmony_ci
3262306a36Sopenharmony_cistatic inline pmd_t *pmd_alloc_track(struct mm_struct *mm, pud_t *pud,
3362306a36Sopenharmony_ci				     unsigned long address,
3462306a36Sopenharmony_ci				     pgtbl_mod_mask *mod_mask)
3562306a36Sopenharmony_ci{
3662306a36Sopenharmony_ci	if (unlikely(pud_none(*pud))) {
3762306a36Sopenharmony_ci		if (__pmd_alloc(mm, pud, address))
3862306a36Sopenharmony_ci			return NULL;
3962306a36Sopenharmony_ci		*mod_mask |= PGTBL_PUD_MODIFIED;
4062306a36Sopenharmony_ci	}
4162306a36Sopenharmony_ci
4262306a36Sopenharmony_ci	return pmd_offset(pud, address);
4362306a36Sopenharmony_ci}
4462306a36Sopenharmony_ci#endif /* CONFIG_MMU */
4562306a36Sopenharmony_ci
4662306a36Sopenharmony_ci#define pte_alloc_kernel_track(pmd, address, mask)			\
4762306a36Sopenharmony_ci	((unlikely(pmd_none(*(pmd))) &&					\
4862306a36Sopenharmony_ci	  (__pte_alloc_kernel(pmd) || ({*(mask)|=PGTBL_PMD_MODIFIED;0;})))?\
4962306a36Sopenharmony_ci		NULL: pte_offset_kernel(pmd, address))
5062306a36Sopenharmony_ci
5162306a36Sopenharmony_ci#endif /* _LINUX_PGALLOC_TRACK_H */
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