v4.19.13 snapshot.
diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h
new file mode 100644
index 0000000..39b9f31
--- /dev/null
+++ b/arch/mips/include/asm/pgalloc.h
@@ -0,0 +1,143 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
+ * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_PGALLOC_H
+#define _ASM_PGALLOC_H
+
+#include <linux/highmem.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
+ pte_t *pte)
+{
+ set_pmd(pmd, __pmd((unsigned long)pte));
+}
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+ pgtable_t pte)
+{
+ set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
+}
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+/*
+ * Initialize a new pmd table with invalid pointers.
+ */
+extern void pmd_init(unsigned long page, unsigned long pagetable);
+
+#ifndef __PAGETABLE_PMD_FOLDED
+
+static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+{
+ set_pud(pud, __pud((unsigned long)pmd));
+}
+#endif
+
+/*
+ * Initialize a new pgd / pmd table with invalid pointers.
+ */
+extern void pgd_init(unsigned long page);
+extern pgd_t *pgd_alloc(struct mm_struct *mm);
+
+static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+ free_pages((unsigned long)pgd, PGD_ORDER);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+ unsigned long address)
+{
+ return (pte_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PTE_ORDER);
+}
+
+static inline struct page *pte_alloc_one(struct mm_struct *mm,
+ unsigned long address)
+{
+ struct page *pte;
+
+ pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
+ if (!pte)
+ return NULL;
+ clear_highpage(pte);
+ if (!pgtable_page_ctor(pte)) {
+ __free_page(pte);
+ return NULL;
+ }
+ return pte;
+}
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+ free_pages((unsigned long)pte, PTE_ORDER);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+{
+ pgtable_page_dtor(pte);
+ __free_pages(pte, PTE_ORDER);
+}
+
+#define __pte_free_tlb(tlb,pte,address) \
+do { \
+ pgtable_page_dtor(pte); \
+ tlb_remove_page((tlb), pte); \
+} while (0)
+
+#ifndef __PAGETABLE_PMD_FOLDED
+
+static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+ pmd_t *pmd;
+
+ pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
+ if (pmd)
+ pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
+ return pmd;
+}
+
+static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+{
+ free_pages((unsigned long)pmd, PMD_ORDER);
+}
+
+#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
+
+#endif
+
+#ifndef __PAGETABLE_PUD_FOLDED
+
+static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+ pud_t *pud;
+
+ pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
+ if (pud)
+ pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
+ return pud;
+}
+
+static inline void pud_free(struct mm_struct *mm, pud_t *pud)
+{
+ free_pages((unsigned long)pud, PUD_ORDER);
+}
+
+static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
+{
+ set_pgd(pgd, __pgd((unsigned long)pud));
+}
+
+#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x)
+
+#endif /* __PAGETABLE_PUD_FOLDED */
+
+#define check_pgt_cache() do { } while (0)
+
+extern void pagetable_init(void);
+
+#endif /* _ASM_PGALLOC_H */