int (*context_dtor) (struct drm_device * dev, int context);
        int (*kernel_context_switch) (struct drm_device * dev, int old,
                                      int new);
-       void (*kernel_context_switch_unlock) (struct drm_device * dev,
-                                             drm_lock_t *lock);
+       void (*kernel_context_switch_unlock) (struct drm_device * dev);
        int (*vblank_wait) (struct drm_device * dev, unsigned int *sequence);
        int (*vblank_wait2) (struct drm_device * dev, unsigned int *sequence);
        int (*dri_library_name) (struct drm_device *dev, char *buf);
 
         * modules but is required by the Sparc driver.
         */
        if (dev->driver->kernel_context_switch_unlock)
-               dev->driver->kernel_context_switch_unlock(dev, &lock);
+               dev->driver->kernel_context_switch_unlock(dev);
        else {
                drm_lock_transfer(dev, &dev->lock.hw_lock->lock,
                                  DRM_KERNEL_CONTEXT);