v4.19.13 snapshot.
diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h
new file mode 100644
index 0000000..4355f0e
--- /dev/null
+++ b/arch/arm/include/asm/page.h
@@ -0,0 +1,173 @@
+/*
+ * arch/arm/include/asm/page.h
+ *
+ * Copyright (C) 1995-2003 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASMARM_PAGE_H
+#define _ASMARM_PAGE_H
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT 12
+#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
+#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
+
+#ifndef __ASSEMBLY__
+
+#ifndef CONFIG_MMU
+
+#include <asm/page-nommu.h>
+
+#else
+
+#include <asm/glue.h>
+
+/*
+ * User Space Model
+ * ================
+ *
+ * This section selects the correct set of functions for dealing with
+ * page-based copying and clearing for user space for the particular
+ * processor(s) we're building for.
+ *
+ * We have the following to choose from:
+ * v4wt - ARMv4 with writethrough cache, without minicache
+ * v4wb - ARMv4 with writeback cache, without minicache
+ * v4_mc - ARMv4 with minicache
+ * xscale - Xscale
+ * xsc3 - XScalev3
+ */
+#undef _USER
+#undef MULTI_USER
+
+#ifdef CONFIG_CPU_COPY_V4WT
+# ifdef _USER
+# define MULTI_USER 1
+# else
+# define _USER v4wt
+# endif
+#endif
+
+#ifdef CONFIG_CPU_COPY_V4WB
+# ifdef _USER
+# define MULTI_USER 1
+# else
+# define _USER v4wb
+# endif
+#endif
+
+#ifdef CONFIG_CPU_COPY_FEROCEON
+# ifdef _USER
+# define MULTI_USER 1
+# else
+# define _USER feroceon
+# endif
+#endif
+
+#ifdef CONFIG_CPU_COPY_FA
+# ifdef _USER
+# define MULTI_USER 1
+# else
+# define _USER fa
+# endif
+#endif
+
+#ifdef CONFIG_CPU_SA1100
+# ifdef _USER
+# define MULTI_USER 1
+# else
+# define _USER v4_mc
+# endif
+#endif
+
+#ifdef CONFIG_CPU_XSCALE
+# ifdef _USER
+# define MULTI_USER 1
+# else
+# define _USER xscale_mc
+# endif
+#endif
+
+#ifdef CONFIG_CPU_XSC3
+# ifdef _USER
+# define MULTI_USER 1
+# else
+# define _USER xsc3_mc
+# endif
+#endif
+
+#ifdef CONFIG_CPU_COPY_V6
+# define MULTI_USER 1
+#endif
+
+#if !defined(_USER) && !defined(MULTI_USER)
+#error Unknown user operations model
+#endif
+
+struct page;
+struct vm_area_struct;
+
+struct cpu_user_fns {
+ void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr);
+ void (*cpu_copy_user_highpage)(struct page *to, struct page *from,
+ unsigned long vaddr, struct vm_area_struct *vma);
+};
+
+#ifdef MULTI_USER
+extern struct cpu_user_fns cpu_user;
+
+#define __cpu_clear_user_highpage cpu_user.cpu_clear_user_highpage
+#define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage
+
+#else
+
+#define __cpu_clear_user_highpage __glue(_USER,_clear_user_highpage)
+#define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage)
+
+extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
+extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
+ unsigned long vaddr, struct vm_area_struct *vma);
+#endif
+
+#define clear_user_highpage(page,vaddr) \
+ __cpu_clear_user_highpage(page, vaddr)
+
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+#define copy_user_highpage(to,from,vaddr,vma) \
+ __cpu_copy_user_highpage(to, from, vaddr, vma)
+
+#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
+extern void copy_page(void *to, const void *from);
+
+#ifdef CONFIG_KUSER_HELPERS
+#define __HAVE_ARCH_GATE_AREA 1
+#endif
+
+#ifdef CONFIG_ARM_LPAE
+#include <asm/pgtable-3level-types.h>
+#else
+#include <asm/pgtable-2level-types.h>
+#endif
+
+#endif /* CONFIG_MMU */
+
+typedef struct page *pgtable_t;
+
+#ifdef CONFIG_HAVE_ARCH_PFN_VALID
+extern int pfn_valid(unsigned long);
+#endif
+
+#include <asm/memory.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#define VM_DATA_DEFAULT_FLAGS \
+ (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
+ VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/getorder.h>
+
+#endif