--- linux-2.6.12.3/include/asm-i386/mc146818rtc.h
+++ linux-2.6.12.3/include/asm-i386/mc146818rtc.h
@@ -5,14 +5,21 @@
 #define _ASM_MC146818RTC_H
 
 #include <asm/io.h>
+
+#ifdef __KERNEL__
+
 #include <asm/system.h>
 #include <linux/mc146818rtc.h>
 
+#endif /* __KERNEL__ */
+
 #ifndef RTC_PORT
 #define RTC_PORT(x)	(0x70 + (x))
 #define RTC_ALWAYS_BCD	1	/* RTC operates in binary mode */
 #endif
 
+#ifdef __KERNEL__
+
 #ifdef __HAVE_ARCH_CMPXCHG
 /*
  * This lock provides nmi access to the CMOS/RTC registers.  It has some
@@ -80,6 +87,8 @@
 #define current_lock_cmos_reg() 0
 #endif
 
+#endif /* __KERNEL__ */
+
 /*
  * The yet supported machines all access the RTC index register via
  * an ISA port access but the way to access the date register differs ...