#include <asm/io.h>
#include <linux/rtc.h> /* get the user-level API */
-#include <linux/spinlock.h> /* spinlock_t */
#include <asm/mc146818rtc.h> /* register access macros */
+#ifdef __KERNEL__
+#include <linux/spinlock.h> /* spinlock_t */
extern spinlock_t rtc_lock; /* serialize CMOS RAM access */
+#endif
/**********************************************************************
* register summary