3 files changed, 25 insertions, 3 deletions

diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 864f09fd9f86..b47bb2d7476a 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -12,6 +12,7 @@
  *
  */
 #include <linux/errno.h>
+#include <linux/module.h>
 #include <linux/device.h>
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
@@ -94,3 +95,23 @@ int of_bus_type_init(struct bus_type *bus, const char *name)
         bus->resume = of_platform_device_resume;
         return bus_register(bus);
 }
+
+int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
+{
+        /* initialize common driver fields */
+        if (!drv->driver.name)
+                drv->driver.name = drv->name;
+        if (!drv->driver.owner)
+                drv->driver.owner = drv->owner;
+        drv->driver.bus = bus;
+
+        /* register with core */
+        return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL(of_register_driver);
+
+void of_unregister_driver(struct of_platform_driver *drv)
+{
+        driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL(of_unregister_driver);
diff --git a/drivers/sbus/char/vfc.h b/drivers/sbus/char/vfc.h
index 63941a259b92..f1aa1389ea4a 100644
--- a/drivers/sbus/char/vfc.h
+++ b/drivers/sbus/char/vfc.h
@@ -126,7 +126,7 @@ struct vfc_dev {
         volatile struct vfc_regs __iomem *regs;
         struct vfc_regs *phys_regs;
         unsigned int control_reg;
-        struct semaphore device_lock_sem;
+        struct mutex device_lock_mtx;
         int instance;
         int busy;
         unsigned long which_io;
diff --git a/drivers/sbus/char/vfc_dev.c b/drivers/sbus/char/vfc_dev.c
index 9269f7fbd363..e7a1642b2aa4 100644
--- a/drivers/sbus/char/vfc_dev.c
+++ b/drivers/sbus/char/vfc_dev.c
@@ -22,6 +22,7 @@
 #include <linux/fs.h>
 #include <linux/delay.h>
 #include <linux/spinlock.h>
+#include <linux/mutex.h>
 #include <linux/mm.h>
 
 #include <asm/openprom.h>
@@ -54,12 +55,12 @@ static unsigned char saa9051_init_array[VFC_SAA9051_NR] = {
 
 void vfc_lock_device(struct vfc_dev *dev)
 {
-        down(&dev->device_lock_sem);
+        mutex_lock(&dev->device_lock_mtx);
 }
 
 void vfc_unlock_device(struct vfc_dev *dev)
 {
-        up(&dev->device_lock_sem);
+        mutex_unlock(&dev->device_lock_mtx);
 }