Index: kernel/arch/mips32/include/arch/barrier.h
===================================================================
--- kernel/arch/mips32/include/arch/barrier.h	(revision af9dd1ed6f5d79cc098da33ff7131162b1c177a4)
+++ kernel/arch/mips32/include/arch/barrier.h	(revision 811770c99b96760cdbd8d7f79f5e5bcb969a353e)
@@ -46,6 +46,10 @@
 #define write_barrier()  asm volatile ("" ::: "memory")
 
+#ifdef KERNEL
+
 #define smc_coherence(a)
 #define smc_coherence_block(a, l)
+
+#endif	/* KERNEL */
 
 #endif