diff --git a/[refs] b/[refs]
index 18ca2d67d703..5b364935edb2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d3ffd085536c1801da74c098e25fd3985671e15d
+refs/heads/master: d9912d87840b321678c85396c6adf15ced2c228d
diff --git a/trunk/arch/mips/kernel/irq_cpu.c b/trunk/arch/mips/kernel/irq_cpu.c
index 060722e42c53..31c38c4971c0 100644
--- a/trunk/arch/mips/kernel/irq_cpu.c
+++ b/trunk/arch/mips/kernel/irq_cpu.c
@@ -55,6 +55,7 @@ static inline void mips_cpu_irq_enable(unsigned int irq)
 
 	local_irq_save(flags);
 	unmask_mips_irq(irq);
+	back_to_back_c0_hazard();
 	local_irq_restore(flags);
 }
 
@@ -64,6 +65,7 @@ static void mips_cpu_irq_disable(unsigned int irq)
 
 	local_irq_save(flags);
 	mask_mips_irq(irq);
+	back_to_back_c0_hazard();
 	local_irq_restore(flags);
 }