add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/s390/include/asm/page.h
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@@ -68,9 +68,9 @@
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 #define clear_user_page(page, vaddr, pg)	clear_page(page)
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 #define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
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-#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
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-	alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
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-#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
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+#define alloc_zeroed_user_highpage_movable(vma, vaddr) \
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+	alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
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+#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
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 /*
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  * These are used to make use of C type-checking..
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@@ -153,6 +153,11 @@
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 #define HAVE_ARCH_FREE_PAGE
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 #define HAVE_ARCH_ALLOC_PAGE
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+#if IS_ENABLED(CONFIG_PGSTE)
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+int arch_make_page_accessible(struct page *page);
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+#define HAVE_ARCH_MAKE_PAGE_ACCESSIBLE
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+#endif
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+
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 #endif /* !__ASSEMBLY__ */
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 #define __PAGE_OFFSET		0x0UL
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@@ -161,24 +166,22 @@
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 #define __pa(x)			((unsigned long)(x))
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 #define __va(x)			((void *)(unsigned long)(x))
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-#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
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-#define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
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+#define phys_to_pfn(phys)	((phys) >> PAGE_SHIFT)
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+#define pfn_to_phys(pfn)	((pfn) << PAGE_SHIFT)
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+
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+#define phys_to_page(phys)	pfn_to_page(phys_to_pfn(phys))
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+#define page_to_phys(page)	pfn_to_phys(page_to_pfn(page))
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+
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+#define pfn_to_virt(pfn)	__va(pfn_to_phys(pfn))
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+#define virt_to_pfn(kaddr)	(phys_to_pfn(__pa(kaddr)))
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+#define pfn_to_kaddr(pfn)	pfn_to_virt(pfn)
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 #define virt_to_page(kaddr)	pfn_to_page(virt_to_pfn(kaddr))
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 #define page_to_virt(page)	pfn_to_virt(page_to_pfn(page))
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-#define phys_to_pfn(kaddr)	((kaddr) >> PAGE_SHIFT)
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-#define pfn_to_phys(pfn)	((pfn) << PAGE_SHIFT)
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+#define virt_addr_valid(kaddr)	pfn_valid(virt_to_pfn(kaddr))
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-#define phys_to_page(kaddr)	pfn_to_page(phys_to_pfn(kaddr))
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-#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
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-
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-#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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-
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-#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | \
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-				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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-
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-#define ARCH_ZONE_DMA_BITS	31
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+#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_NON_EXEC
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 #include <asm-generic/memory_model.h>
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 #include <asm-generic/getorder.h>