diff --git a/arch/arm/include/asm/i8253.h b/arch/arm/include/asm/i8253.h
index 70656b69d5ce15d9ba71ea87c1b2d996e2fe41d5..5b41b92ecf6a340c46be84c45ef6864e4cb650e7 100644
--- a/arch/arm/include/asm/i8253.h
+++ b/arch/arm/include/asm/i8253.h
@@ -1,15 +1,6 @@
 #ifndef __ASMARM_I8253_H
 #define __ASMARM_I8253_H
 
-/* i8253A PIT registers */
-#define PIT_MODE	0x43
-#define PIT_CH0		0x40
-
 #define PIT_LATCH	((PIT_TICK_RATE + HZ / 2) / HZ)
 
-extern raw_spinlock_t i8253_lock;
-
-#define outb_pit	outb_p
-#define inb_pit		inb_p
-
 #endif
diff --git a/arch/mips/include/asm/i8253.h b/arch/mips/include/asm/i8253.h
index 9ad011366f73190cce3527dbc754d3abad61ffb5..32ec1f00c6b31df06b8a8cba7794234e89161052 100644
--- a/arch/mips/include/asm/i8253.h
+++ b/arch/mips/include/asm/i8253.h
@@ -5,20 +5,8 @@
 #ifndef __ASM_I8253_H
 #define __ASM_I8253_H
 
-#include <linux/spinlock.h>
-
-/* i8253A PIT registers */
-#define PIT_MODE		0x43
-#define PIT_CH0			0x40
-#define PIT_CH2			0x42
-
 #define PIT_LATCH		LATCH
 
-extern raw_spinlock_t i8253_lock;
-
 extern void setup_pit_timer(void);
 
-#define inb_pit inb_p
-#define outb_pit outb_p
-
 #endif /* __ASM_I8253_H */
diff --git a/arch/x86/include/asm/i8253.h b/arch/x86/include/asm/i8253.h
index 65aaa91d5850c03238ced9403da7c5ce5342a5ea..20480cef7547c9ba5c45515c4159ac50c0d47827 100644
--- a/arch/x86/include/asm/i8253.h
+++ b/arch/x86/include/asm/i8253.h
@@ -1,20 +1,10 @@
 #ifndef _ASM_X86_I8253_H
 #define _ASM_X86_I8253_H
 
-/* i8253A PIT registers */
-#define PIT_MODE		0x43
-#define PIT_CH0			0x40
-#define PIT_CH2			0x42
-
 #define PIT_LATCH	LATCH
 
-extern raw_spinlock_t i8253_lock;
-
 extern struct clock_event_device *global_clock_event;
 
 extern void setup_pit_timer(void);
 
-#define inb_pit		inb_p
-#define outb_pit	outb_p
-
 #endif /* _ASM_X86_I8253_H */
diff --git a/include/linux/i8253.h b/include/linux/i8253.h
index d2cba88f75d6326ba15f34d40ae38dc3c50a18e8..13048d33536859183e2e2ab9cbcee892761db861 100644
--- a/include/linux/i8253.h
+++ b/include/linux/i8253.h
@@ -2,10 +2,24 @@
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
+ *
+ *  Machine specific IO port address definition for generic.
+ *  Written by Osamu Tomita <tomita@cinet.co.jp>
  */
 #ifndef __LINUX_I8253_H
 #define __LINUX_I8253_H
 
+#include <linux/spinlock.h>
 #include <asm/i8253.h>
 
+/* i8253A PIT registers */
+#define PIT_MODE	0x43
+#define PIT_CH0		0x40
+#define PIT_CH2		0x42
+
+#define inb_pit         inb_p
+#define outb_pit        outb_p
+
+extern raw_spinlock_t i8253_lock;
+
 #endif /* __LINUX_I8253_H */