add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/um/include/asm/pgtable-3level.h
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@@ -84,7 +84,7 @@
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 }
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 #define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
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-#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PAGE_MASK))
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+#define pud_pgtable(pud) ((pmd_t *) __va(pud_val(pud) & PAGE_MASK))
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 static inline unsigned long pte_pfn(pte_t pte)
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 {