diff --git a/include/asm-frv/pgtable.h b/include/asm-frv/pgtable.h
index 6c0682e..4e21904 100644
--- a/include/asm-frv/pgtable.h
+++ b/include/asm-frv/pgtable.h
@@ -507,13 +507,22 @@
  */
 static inline void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte)
 {
+	struct mm_struct *mm;
 	unsigned long ampr;
-	pgd_t *pge = pgd_offset(current->mm, address);
-	pud_t *pue = pud_offset(pge, address);
-	pmd_t *pme = pmd_offset(pue, address);
 
-	ampr = pme->ste[0] & 0xffffff00;
-	ampr |= xAMPRx_L | xAMPRx_SS_16Kb | xAMPRx_S | xAMPRx_C | xAMPRx_V;
+	mm = current->mm;
+	if (mm) {
+		pgd_t *pge = pgd_offset(mm, address);
+		pud_t *pue = pud_offset(pge, address);
+		pmd_t *pme = pmd_offset(pue, address);
+
+		ampr = pme->ste[0] & 0xffffff00;
+		ampr |= xAMPRx_L | xAMPRx_SS_16Kb | xAMPRx_S | xAMPRx_C |
+			xAMPRx_V;
+	} else {
+		address = ULONG_MAX;
+		ampr = 0;
+	}
 
 	asm volatile("movgs %0,scr0\n"
 		     "movgs %0,scr1\n"