diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index d7ece131b4f4bd64af82fd80160279ffd99a1db5..8d8a00e5a30e307fbc474aa33cd154fb683b0fc2 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -5,6 +5,7 @@
 menuconfig I2C
 	tristate "I2C support"
 	depends on HAS_IOMEM
+	select RT_MUTEXES
 	---help---
 	  I2C (pronounce: I-square-C) is a slow serial bus protocol used in
 	  many micro controller applications and developed by Philips.  SMBus,
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 296504355142f2f7bb5f3338a30fe79d37f36b8f..d664b4a97a31fd6baeafc95e5f0a9f14ec130ae4 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -584,7 +584,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
 		goto out_list;
 	}
 
-	mutex_init(&adap->bus_lock);
+	rt_mutex_init(&adap->bus_lock);
 
 	/* Set default timeout to 1 second if not already set */
 	if (adap->timeout == 0)
@@ -1092,12 +1092,12 @@ int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 #endif
 
 		if (in_atomic() || irqs_disabled()) {
-			ret = mutex_trylock(&adap->bus_lock);
+			ret = rt_mutex_trylock(&adap->bus_lock);
 			if (!ret)
 				/* I2C activity is ongoing. */
 				return -EAGAIN;
 		} else {
-			mutex_lock_nested(&adap->bus_lock, adap->level);
+			rt_mutex_lock(&adap->bus_lock);
 		}
 
 		/* Retry automatically on arbitration loss */
@@ -1109,7 +1109,7 @@ int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 			if (time_after(jiffies, orig_jiffies + adap->timeout))
 				break;
 		}
-		mutex_unlock(&adap->bus_lock);
+		rt_mutex_unlock(&adap->bus_lock);
 
 		return ret;
 	} else {
@@ -1913,7 +1913,7 @@ s32 i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, unsigned short flags,
 	flags &= I2C_M_TEN | I2C_CLIENT_PEC;
 
 	if (adapter->algo->smbus_xfer) {
-		mutex_lock(&adapter->bus_lock);
+		rt_mutex_lock(&adapter->bus_lock);
 
 		/* Retry automatically on arbitration loss */
 		orig_jiffies = jiffies;
@@ -1927,7 +1927,7 @@ s32 i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, unsigned short flags,
 				       orig_jiffies + adapter->timeout))
 				break;
 		}
-		mutex_unlock(&adapter->bus_lock);
+		rt_mutex_unlock(&adapter->bus_lock);
 	} else
 		res = i2c_smbus_xfer_emulated(adapter,addr,flags,read_write,
 					      command, protocol, data);
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 7b40cda57a702273fcbdeb7ba7487fdfe1406aff..52317fb5917e764170f1279afe6b888682e1a517 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -338,8 +338,7 @@ struct i2c_adapter {
 	void *algo_data;
 
 	/* data fields that are valid for all devices	*/
-	u8 level; 			/* nesting level for lockdep */
-	struct mutex bus_lock;
+	struct rt_mutex bus_lock;
 
 	int timeout;			/* in jiffies */
 	int retries;
@@ -367,7 +366,7 @@ static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
  */
 static inline void i2c_lock_adapter(struct i2c_adapter *adapter)
 {
-	mutex_lock(&adapter->bus_lock);
+	rt_mutex_lock(&adapter->bus_lock);
 }
 
 /**
@@ -376,7 +375,7 @@ static inline void i2c_lock_adapter(struct i2c_adapter *adapter)
  */
 static inline void i2c_unlock_adapter(struct i2c_adapter *adapter)
 {
-	mutex_unlock(&adapter->bus_lock);
+	rt_mutex_unlock(&adapter->bus_lock);
 }
 
 /*flags for the client struct: */