diff --git a/arch/mips/kernel/watch.c b/arch/mips/kernel/watch.c
index 329d2209521d..0e61a5b7647f 100644
--- a/arch/mips/kernel/watch.c
+++ b/arch/mips/kernel/watch.c
@@ -48,21 +48,19 @@ void mips_read_watch_registers(void)
 {
 	struct mips3264_watch_reg_state *watches =
 		&current->thread.watch.mips3264;
+	unsigned int watchhi_mask = MIPS_WATCHHI_MASK | MIPS_WATCHHI_IRW;
+
 	switch (current_cpu_data.watch_reg_use_cnt) {
 	default:
 		BUG();
 	case 4:
-		watches->watchhi[3] = (read_c0_watchhi3() &
-				       (MIPS_WATCHHI_MASK | MIPS_WATCHHI_IRW));
+		watches->watchhi[3] = (read_c0_watchhi3() & watchhi_mask);
 	case 3:
-		watches->watchhi[2] = (read_c0_watchhi2() &
-				       (MIPS_WATCHHI_MASK | MIPS_WATCHHI_IRW));
+		watches->watchhi[2] = (read_c0_watchhi2() & watchhi_mask);
 	case 2:
-		watches->watchhi[1] = (read_c0_watchhi1() &
-				       (MIPS_WATCHHI_MASK | MIPS_WATCHHI_IRW));
+		watches->watchhi[1] = (read_c0_watchhi1() & watchhi_mask);
 	case 1:
-		watches->watchhi[0] = (read_c0_watchhi0() &
-				       (MIPS_WATCHHI_MASK | MIPS_WATCHHI_IRW));
+		watches->watchhi[0] = (read_c0_watchhi0() & watchhi_mask);
 	}
 	if (current_cpu_data.watch_reg_use_cnt == 1 &&
 	    (watches->watchhi[0] & MIPS_WATCHHI_IRW) == 0) {