--- zzzz-none-000/linux-3.10.107/arch/powerpc/mm/mmu_context_hash64.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/powerpc/mm/mmu_context_hash64.c	2021-02-04 17:41:59.000000000 +0000
@@ -89,6 +89,9 @@
 #ifdef CONFIG_PPC_64K_PAGES
 	mm->context.pte_frag = NULL;
 #endif
+#ifdef CONFIG_SPAPR_TCE_IOMMU
+	mm_iommu_init(&mm->context);
+#endif
 	return 0;
 }
 
@@ -132,6 +135,9 @@
 
 void destroy_context(struct mm_struct *mm)
 {
+#ifdef CONFIG_SPAPR_TCE_IOMMU
+	mm_iommu_cleanup(&mm->context);
+#endif
 
 #ifdef CONFIG_PPC_ICSWX
 	drop_cop(mm->context.acop, mm);