--- zzzz-none-000/linux-3.10.107/arch/mips/mm/hugetlbpage.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/mm/hugetlbpage.c	2021-02-04 17:41:59.000000000 +0000
@@ -11,7 +11,6 @@
  * Copyright (C) 2008, 2009 Cavium Networks, Inc.
  */
 
-#include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
@@ -52,11 +51,6 @@
 	return (pte_t *) pmd;
 }
 
-int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
-{
-	return 0;
-}
-
 /*
  * This function checks for proper alignment of input addr and len parameters.
  */
@@ -69,12 +63,6 @@
 	return 0;
 }
 
-struct page *
-follow_huge_addr(struct mm_struct *mm, unsigned long address, int write)
-{
-	return ERR_PTR(-EINVAL);
-}
-
 int pmd_huge(pmd_t pmd)
 {
 	return (pmd_val(pmd) & _PAGE_HUGE) != 0;
@@ -84,15 +72,3 @@
 {
 	return (pud_val(pud) & _PAGE_HUGE) != 0;
 }
-
-struct page *
-follow_huge_pmd(struct mm_struct *mm, unsigned long address,
-		pmd_t *pmd, int write)
-{
-	struct page *page;
-
-	page = pte_page(*(pte_t *)pmd);
-	if (page)
-		page += ((address & ~HPAGE_MASK) >> PAGE_SHIFT);
-	return page;
-}