[PATCH] Fix gen_rtc compilation error

From: Geert Uytterhoeven <geert@linux-m68k.org>

It updates include/asm-{generic,parisc}/rtc.h for the recent changes in
drivers/char/genrtc.c and include/asm-{m68k,ppc}/rtc.h.

get_rtc_time() now returns some RTC flags instead of a 0/-1 success/failure
indicator.  These flags include:

   - RTC_BATT_BAD: RTC battery is bad (can be detected on PA-RISC)
   - RTC_24H: Clock runs in 24 hour mode

Most of these flags are the same as drivers/char/rtc.c, but RTC_BATT_BAD is a
new one.

include/asm-generic/rtc.h

@@ -22,9 +22,8 @@
 #define RTC_AIE 0x20		/* alarm interrupt enable */
 #define RTC_UIE 0x10		/* update-finished interrupt enable */
 
-extern void gen_rtc_interrupt(unsigned long);
-
 /* some dummy definitions */
+#define RTC_BATT_BAD 0x100	/* battery bad */
 #define RTC_SQWE 0x08		/* enable square-wave output */
 #define RTC_DM_BINARY 0x04	/* all time/date values are BCD if clear */
 #define RTC_24H 0x02		/* 24 hour mode - else hours bit 7 means pm */
@@ -43,7 +42,7 @@ static inline unsigned char rtc_is_updating(void)
 	return uip;
 }
 
-static inline void get_rtc_time(struct rtc_time *time)
+static inline unsigned int get_rtc_time(struct rtc_time *time)
 {
 	unsigned long uip_watchdog = jiffies;
 	unsigned char ctrl;
@@ -108,6 +107,8 @@ static inline void get_rtc_time(struct rtc_time *time)
 		time->tm_year += 100;
 
 	time->tm_mon--;
+
+	return RTC_24H;
 }
 
 /* Set the current date and time in the real time clock. */

include/asm-parisc/rtc.h

@@ -24,7 +24,7 @@
 #define RTC_AIE 0x20		/* alarm interrupt enable */
 #define RTC_UIE 0x10		/* update-finished interrupt enable */
 
-extern void gen_rtc_interrupt(unsigned long);
+#define RTC_BATT_BAD 0x100	/* battery bad */
 
 /* some dummy definitions */
 #define RTC_SQWE 0x08		/* enable square-wave output */
@@ -44,16 +44,16 @@ static const unsigned short int __mon_yday[2][13] =
 	{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
 };
 
-static int get_rtc_time(struct rtc_time *wtime)
+static inline unsigned int get_rtc_time(struct rtc_time *wtime)
 {
 	struct pdc_tod tod_data;
 	long int days, rem, y;
 	const unsigned short int *ip;
 
 	if(pdc_tod_read(&tod_data) < 0)
-		return -1;
+		return RTC_24H | RTC_BATT_BAD;
+
 
-	
 	// most of the remainder of this function is:
 //	Copyright (C) 1991, 1993, 1997, 1998 Free Software Foundation, Inc.
 //	This was originally a part of the GNU C Library.
@@ -69,7 +69,7 @@ static int get_rtc_time(struct rtc_time *wtime)
 	wtime->tm_sec = rem % 60;
 
 	y = 1970;
-	
+
 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
 #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
 
@@ -92,8 +92,8 @@ static int get_rtc_time(struct rtc_time *wtime)
 	days -= ip[y];
 	wtime->tm_mon = y;
 	wtime->tm_mday = days + 1;
-	
-	return 0;
+
+	return RTC_24H;
 }
 
 static int set_rtc_time(struct rtc_time *wtime)