add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/include/asm-generic/pgtable-nop4d.h
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@@ -26,6 +26,7 @@
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 #define p4d_ERROR(p4d)				(pgd_ERROR((p4d).pgd))
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 #define pgd_populate(mm, pgd, p4d)		do { } while (0)
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+#define pgd_populate_safe(mm, pgd, p4d)		do { } while (0)
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 /*
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  * (p4ds are folded into pgds so this doesn't get actually called,
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  * but the define is needed for a generic inline function.)
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@@ -41,7 +42,7 @@
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 #define __p4d(x)				((p4d_t) { __pgd(x) })
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 #define pgd_page(pgd)				(p4d_page((p4d_t){ pgd }))
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-#define pgd_page_vaddr(pgd)			(p4d_page_vaddr((p4d_t){ pgd }))
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+#define pgd_page_vaddr(pgd)			((unsigned long)(p4d_pgtable((p4d_t){ pgd })))
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 /*
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  * allocating and freeing a p4d is trivial: the 1-entry p4d is
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@@ -49,7 +50,7 @@
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  */
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 #define p4d_alloc_one(mm, address)		NULL
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 #define p4d_free(mm, x)				do { } while (0)
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-#define __p4d_free_tlb(tlb, x, a)		do { } while (0)
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+#define p4d_free_tlb(tlb, x, a)			do { } while (0)
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 #undef  p4d_addr_end
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 #define p4d_addr_end(addr, end)			(end)