add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/mm/page_vma_mapped.c
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@@ -52,12 +52,16 @@
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 	return true;
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 }
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-static inline bool pfn_in_hpage(struct page *hpage, unsigned long pfn)
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+static inline bool pfn_is_match(struct page *page, unsigned long pfn)
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 {
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-	unsigned long hpage_pfn = page_to_pfn(hpage);
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+	unsigned long page_pfn = page_to_pfn(page);
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+
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+	/* normal page and hugetlbfs page */
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+	if (!PageTransCompound(page) || PageHuge(page))
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+		return page_pfn == pfn;
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 	/* THP can be referenced by any subpage */
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-	return pfn >= hpage_pfn && pfn - hpage_pfn < hpage_nr_pages(hpage);
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+	return pfn >= page_pfn && pfn - page_pfn < thp_nr_pages(page);
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 }
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 /**
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@@ -108,7 +112,7 @@
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 		pfn = pte_pfn(*pvmw->pte);
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 	}
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-	return pfn_in_hpage(pvmw->page, pfn);
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+	return pfn_is_match(pvmw->page, pfn);
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 }
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 static void step_forward(struct page_vma_mapped_walk *pvmw, unsigned long size)
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@@ -162,8 +166,7 @@
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 			return not_found(pvmw);
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 		/* when pud is not present, pte will be NULL */
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-		pvmw->pte = huge_pte_offset(mm, pvmw->address,
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-					    PAGE_SIZE << compound_order(page));
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+		pvmw->pte = huge_pte_offset(mm, pvmw->address, page_size(page));
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 		if (!pvmw->pte)
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 			return false;
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