diff --git a/sys/arm/include/atomic-v4.h b/sys/arm/include/atomic-v4.h
index 7048178f3046..2854655a732e 100644
--- a/sys/arm/include/atomic-v4.h
+++ b/sys/arm/include/atomic-v4.h
@@ -439,4 +439,37 @@ atomic_subtract_long(volatile u_long *p, u_long v)
 	atomic_subtract_32((volatile uint32_t *)p, v);
 }
 
+/*
+ * ARMv5 does not support SMP.  For both kernel and user modes, only a
+ * compiler barrier is needed for fences, since CPU is always
+ * self-consistent.
+ */
+static __inline void
+atomic_thread_fence_acq(void)
+{
+
+	__compiler_membar();
+}
+
+static __inline void
+atomic_thread_fence_rel(void)
+{
+
+	__compiler_membar();
+}
+
+static __inline void
+atomic_thread_fence_acq_rel(void)
+{
+
+	__compiler_membar();
+}
+
+static __inline void
+atomic_thread_fence_seq_cst(void)
+{
+
+	__compiler_membar();
+}
+
 #endif /* _MACHINE_ATOMIC_H_ */
diff --git a/sys/arm/include/atomic-v6.h b/sys/arm/include/atomic-v6.h
index 06d8880192c7..d22f7e169e29 100644
--- a/sys/arm/include/atomic-v6.h
+++ b/sys/arm/include/atomic-v6.h
@@ -596,4 +596,32 @@ atomic_store_rel_long(volatile u_long *p, u_long v)
 #undef ATOMIC_ACQ_REL
 #undef ATOMIC_ACQ_REL_LONG
 
+static __inline void
+atomic_thread_fence_acq(void)
+{
+
+	dmb();
+}
+
+static __inline void
+atomic_thread_fence_rel(void)
+{
+
+	dmb();
+}
+
+static __inline void
+atomic_thread_fence_acq_rel(void)
+{
+
+	dmb();
+}
+
+static __inline void
+atomic_thread_fence_seq_cst(void)
+{
+
+	dmb();
+}
+
 #endif /* _MACHINE_ATOMIC_V6_H_ */
diff --git a/sys/arm/include/atomic.h b/sys/arm/include/atomic.h
index 5379030e499f..039af34d77a3 100644
--- a/sys/arm/include/atomic.h
+++ b/sys/arm/include/atomic.h
@@ -82,34 +82,6 @@ atomic_store_long(volatile u_long *dst, u_long src)
 	*dst = src;
 }
 
-static __inline void
-atomic_thread_fence_acq(void)
-{
-
-	dmb();
-}
-
-static __inline void
-atomic_thread_fence_rel(void)
-{
-
-	dmb();
-}
-
-static __inline void
-atomic_thread_fence_acq_rel(void)
-{
-
-	dmb();
-}
-
-static __inline void
-atomic_thread_fence_seq_cst(void)
-{
-
-	dmb();
-}
-
 #define atomic_clear_ptr		atomic_clear_32
 #define atomic_set_ptr			atomic_set_32
 #define atomic_cmpset_ptr		atomic_cmpset_32