diff -wbBur qc-usb-messenger-1.8/qc-driver.c qc-usb-messenger-1.8.my/qc-driver.c
--- qc-usb-messenger-1.8/qc-driver.c	2008-05-26 11:29:16.000000000 +0000
+++ qc-usb-messenger-1.8.my/qc-driver.c	2011-02-03 15:21:38.000000000 +0000
@@ -225,7 +223,7 @@
 };
 
 static LIST_HEAD(quickcam_list);		/* Linked list containing all QuickCams */
-static DECLARE_MUTEX(quickcam_list_lock);	/* Always lock first quickcam_list_lock, then qc->lock */
+static struct semaphore quickcam_list_lock;	/* Always lock first quickcam_list_lock, then qc->lock */
 
 /* Default values for user-specified lookup-table; may be overwritten by user */
 static unsigned char userlut_contents[QC_LUT_SIZE] = {
@@ -3588,7 +3606,7 @@
 		PDEBUG("poisoning qc in qc_usb_init");
 		POISON(*qc);
 		if (qcdebug&QC_DEBUGMUTEX) PDEBUG("init down(%p) in qc_usb_init()", qc);
-		init_MUTEX_LOCKED(&qc->lock);
+		sema_init(&qc->lock, 1);
 		qc->users = 0;
 		qc->dev       = usbdev;
 		qc->iface     = ifacenum;