diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c
index 91492190ac72..9615eee9b775 100644
--- a/arch/x86/kernel/rtc.c
+++ b/arch/x86/kernel/rtc.c
@@ -146,8 +146,8 @@ unsigned char rtc_cmos_read(unsigned char addr)
 	unsigned char val;
 
 	lock_cmos_prefix(addr);
-	outb_p(addr, RTC_PORT(0));
-	val = inb_p(RTC_PORT(1));
+	outb(addr, RTC_PORT(0));
+	val = inb(RTC_PORT(1));
 	lock_cmos_suffix(addr);
 	return val;
 }
@@ -156,8 +156,8 @@ EXPORT_SYMBOL(rtc_cmos_read);
 void rtc_cmos_write(unsigned char val, unsigned char addr)
 {
 	lock_cmos_prefix(addr);
-	outb_p(addr, RTC_PORT(0));
-	outb_p(val, RTC_PORT(1));
+	outb(addr, RTC_PORT(0));
+	outb(val, RTC_PORT(1));
 	lock_cmos_suffix(addr);
 }
 EXPORT_SYMBOL(rtc_cmos_write);