--- zzzz-none-000/linux-2.6.32.61/arch/mips/include/asm/r4kcache.h	2013-06-10 09:43:48.000000000 +0000
+++ ar9-7330-650/linux-2.6.32.61/arch/mips/include/asm/r4kcache.h	2012-01-26 18:00:03.000000000 +0000
@@ -166,6 +166,20 @@
 	__iflush_epilogue
 }
 
+static inline void lock_icache_line(unsigned long addr)
+{
+	__iflush_prologue
+	cache_op(Index_Store_Data_I, addr);
+	__iflush_epilogue
+}
+
+static inline void lock_dcache_line(unsigned long addr)
+{
+	__iflush_prologue
+	cache_op(Index_Store_Data_D, addr);
+	__iflush_epilogue
+}
+
 static inline void flush_dcache_line(unsigned long addr)
 {
 	__dflush_prologue