1 files changed, 6 insertions, 2 deletions

diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
index 004c1bc95d2b..e4448e16046d 100644
--- a/arch/arm/include/asm/cacheflush.h
+++ b/arch/arm/include/asm/cacheflush.h
@@ -215,7 +215,9 @@ static inline void vivt_flush_cache_mm(struct mm_struct *mm)
 static inline void
 vivt_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
 {
-        if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm)))
+        struct mm_struct *mm = vma->vm_mm;
+
+        if (!mm || cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm)))
                 __cpuc_flush_user_range(start & PAGE_MASK, PAGE_ALIGN(end),
                                         vma->vm_flags);
 }
@@ -223,7 +225,9 @@ vivt_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned
 static inline void
 vivt_flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsigned long pfn)
 {
-        if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
+        struct mm_struct *mm = vma->vm_mm;
+
+        if (!mm || cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm))) {
                 unsigned long addr = user_addr & PAGE_MASK;
                 __cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags);
         }