sa1100fb: convert ctrlr_sem in a mutex

The semaphore ctrlr_sem is used as a mutex.  Convert it to the mutex API

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/sa1100fb.c

@@ -175,6 +175,7 @@
 #include <linux/cpufreq.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
+#include <linux/mutex.h>
 
 #include <asm/hardware.h>
 #include <asm/io.h>
@@ -1108,7 +1109,7 @@ static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
 {
 	u_int old_state;
 
-	down(&fbi->ctrlr_sem);
+	mutex_lock(&fbi->ctrlr_lock);
 
 	old_state = fbi->state;
 
@@ -1193,7 +1194,7 @@ static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
 		}
 		break;
 	}
-	up(&fbi->ctrlr_sem);
+	mutex_unlock(&fbi->ctrlr_lock);
 }
 
 /*
@@ -1445,7 +1446,7 @@ static struct sa1100fb_info * __init sa1100fb_init_fbinfo(struct device *dev)
 
 	init_waitqueue_head(&fbi->ctrlr_wait);
 	INIT_WORK(&fbi->task, sa1100fb_task);
-	init_MUTEX(&fbi->ctrlr_sem);
+	mutex_init(&fbi->ctrlr_lock);
 
 	return fbi;
 }

drivers/video/sa1100fb.h

@@ -100,7 +100,7 @@ struct sa1100fb_info {
 
 	volatile u_char		state;
 	volatile u_char		task_state;
-	struct semaphore	ctrlr_sem;
+	struct mutex		ctrlr_lock;
 	wait_queue_head_t	ctrlr_wait;
 	struct work_struct	task;