linux/mm/huge_memory.c

2030 	pmd_t pmd, old_pmd;
2035 	old_pmd = pmdp_get(vmf->pmd);
2037 	if (unlikely(!pmd_same(old_pmd, vmf->orig_pmd))) {
2042 	pmd = pmd_modify(old_pmd, vma->vm_page_prot);
2294 		  unsigned long new_addr, pmd_t *old_pmd, pmd_t *new_pmd)
2315 	old_ptl = __pmd_trans_huge_lock(old_pmd, vma);
2320 		pmd = pmdp_huge_get_and_clear(mm, old_addr, old_pmd);
2327 			pgtable = pgtable_trans_huge_withdraw(mm, old_pmd);
2801 	pmd_t _pmd, old_pmd;
2814 	old_pmd = pmdp_huge_clear_flush(vma, haddr, pmd);
2826 		if (pmd_uffd_wp(old_pmd))
2844 	pmd_t old_pmd, _pmd;
2859 		old_pmd = pmdp_huge_clear_flush(vma, haddr, pmd);
2868 		if (unlikely(is_pmd_migration_entry(old_pmd))) {
2871 			entry = pmd_to_swp_entry(old_pmd);
2873 		} else if (is_huge_zero_pmd(old_pmd)) {
2876 			page = pmd_page(old_pmd);
2878 			if (!folio_test_dirty(folio) && pmd_dirty(old_pmd))
2880 			if (!folio_test_referenced(folio) && pmd_young(old_pmd))
2906 		old_pmd = *pmd;
2907 		entry = pmd_to_swp_entry(old_pmd);
2914 		soft_dirty = pmd_swp_soft_dirty(old_pmd);
2915 		uffd_wp = pmd_swp_uffd_wp(old_pmd);
2940 		old_pmd = pmdp_invalidate(vma, haddr, pmd);
2941 		page = pmd_page(old_pmd);
2943 		if (pmd_dirty(old_pmd)) {
2947 		write = pmd_write(old_pmd);
2948 		young = pmd_young(old_pmd);
2949 		soft_dirty = pmd_soft_dirty(old_pmd);
2950 		uffd_wp = pmd_uffd_wp(old_pmd);