diff -Naru hdjmod-1.28o/bulk.c hdjmod-1.28/bulk.c
--- hdjmod-1.28o/bulk.c	2009-01-27 15:25:50.000000000 +0100
+++ hdjmod-1.28/bulk.c	2012-04-06 22:53:14.000000000 +0200
@@ -34,6 +34,9 @@
 #include <linux/usb.h>
 #include <linux/delay.h>
 #include <linux/version.h>	/* For LINUX_VERSION_CODE */
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+#include <linux/semaphore.h>
+#endif
 #if ( LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,24) )
 #include <sound/driver.h>
 #endif
@@ -3062,7 +3065,11 @@
 		goto hdj_create_bulk_interface_error;
 	}
 	/* allocate the buffer for bulk_out_urb */
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+	sema_init(&ubulk->bulk_out_buffer_mutex,1);
+#else
 	init_MUTEX(&ubulk->bulk_out_buffer_mutex);
+#endif
 	
 	ubulk->bulk_out_buffer =
 		usb_buffer_alloc(ubulk->chip->dev, ubulk->bulk_out_size,
@@ -3601,7 +3608,11 @@
 		return -EINVAL;
 	}
 
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+	sema_init(&ubulk->output_control_mutex,1);
+#else
 	init_MUTEX(&ubulk->output_control_mutex);
+#endif
 	init_completion(&ubulk->output_control_completion);
 
 	/* Every product here except the Steel targets HID.  Since the steel does not target HID, we don't
@@ -3855,7 +3866,11 @@
 	u16 value = 0;
 	struct hdj_console_context *dc = ((struct hdj_console_context *)ubulk->device_context);
 
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+	sema_init(&dc->device_config_mutex,1);
+#else
 	init_MUTEX(&dc->device_config_mutex);
+#endif
 	
 	ret = hdjbulk_init_common_context(ubulk,&ubulk->hdj_common);
 	if (ret!=0) {
@@ -4133,7 +4148,11 @@
 
 	spin_lock_init(&dc->bulk_buffer_lock);
 	init_completion(&dc->bulk_request_completion);
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+	sema_init(&dc->bulk_request_mutex,1);
+#else
 	init_MUTEX(&dc->bulk_request_mutex);
+#endif
 
 	if ((ret = init_continuous_reader(ubulk))!=0) {
 		printk(KERN_WARNING"%s() init_continuous_reader() failed, rc:%d\n",
diff -Naru hdjmod-1.28o/device.c hdjmod-1.28/device.c
--- hdjmod-1.28o/device.c	2009-01-27 15:25:50.000000000 +0100
+++ hdjmod-1.28/device.c	2012-04-06 22:54:53.000000000 +0200
@@ -36,6 +36,9 @@
 #include <linux/netlink.h>
 #include <net/sock.h>
 #include <linux/usb.h>
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+#include <linux/semaphore.h>
+#endif
 #if ( LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,24) )
 #include <sound/driver.h>
 #endif
@@ -66,7 +69,11 @@
 module_param_array(id, charp, NULL, 0444);
 MODULE_PARM_DESC(id, "ID string for the Hercules DJ Series adapter.");
 
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+static DEFINE_SEMAPHORE(register_mutex);
+#else
 static DECLARE_MUTEX(register_mutex);
+#endif
 static struct snd_hdj_chip *usb_chip[SNDRV_CARDS];
 
 /* reference count for the socket */
@@ -1682,7 +1689,11 @@
 	chip->card = card;
 	chip->product_code = product_code;
 
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+	sema_init(&chip->vendor_request_mutex,1);
+#else
 	init_MUTEX(&chip->vendor_request_mutex);
+#endif
 
 	/* initialise the atomic variables */
 	atomic_set(&chip->locked_io, 0);
@@ -1697,7 +1708,11 @@
 	INIT_LIST_HEAD(&chip->bulk_list);
 	chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
 			      le16_to_cpu(dev->descriptor.idProduct));
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+	sema_init(&chip->netlink_list_mutex,1);
+#else
 	init_MUTEX(&chip->netlink_list_mutex);
+#endif
 	INIT_LIST_HEAD(&chip->netlink_registered_processes);
 	
 	/* fill in DJ capabilities for this device */
diff -Naru hdjmod-1.28o/midi.c hdjmod-1.28/midi.c
--- hdjmod-1.28o/midi.c	2009-01-27 15:25:50.000000000 +0100
+++ hdjmod-1.28/midi.c	2012-04-06 22:55:48.000000000 +0200
@@ -34,6 +34,9 @@
 #include <linux/module.h>
 #include <linux/usb.h>
 #include <linux/kthread.h>
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+#include <linux/semaphore.h>
+#endif
 #include <asm/byteorder.h>
 #include <asm/atomic.h>
 #if ( LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,24) )
@@ -677,7 +680,11 @@
 	
 	/* this buffer and URB below are for general control requests, like changing the
 	 *  mouse setting or setting LEDs */
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) )
+	sema_init(&controller_state->output_control_ctl_mutex, 1);
+#else
 	init_MUTEX(&controller_state->output_control_ctl_mutex);
+#endif
 	init_completion(&controller_state->output_control_ctl_completion);
 	controller_state->output_control_ctl_req = usb_buffer_alloc(ep->umidi->chip->dev, 
 							sizeof(*(controller_state->output_control_ctl_req)),