diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 53eb396..53ea056 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1513,6 +1513,8 @@
 		if (!registered_fb[i])
 			break;
 	fb_info->node = i;
+	mutex_init(&fb_info->lock);
+	mutex_init(&fb_info->mm_lock);
 
 	fb_info->dev = device_create(fb_class, fb_info->device,
 				     MKDEV(FB_MAJOR, i), NULL, "fb%d", i);