[PATCH] atari: time.c: use msleep_interruptible()

From: Nishanth Aravamudan <nacc@us.ibm.com>

The comments preceding the schedule_timeout() call in time.c below
indicated a 50ms delay is desired. The current code implictly assumes
HZ==100 and requests a delay of 5 ticks. This is clearly broken in
higher HZ models. Using msleep_interruptible() makes HZ changes
transparent. Change the corresponding constant appropriately and add a
comment to indicate units.
 
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Domen Puncer <domen@coderock.org>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

Index: linux-kj/arch/m68k/atari/time.c
===================================================================
--- linux-kj.orig/arch/m68k/atari/time.c	2005-09-21 01:19:04.000000000 +0400
+++ linux-kj/arch/m68k/atari/time.c	2005-09-21 01:24:17.000000000 +0400
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/rtc.h>
 #include <linux/bcd.h>
+#include <linux/delay.h>
 
 #include <asm/atariints.h>
 
@@ -97,7 +98,7 @@ static void mste_write(struct MSTE_RTC *
 	} while(0)
 
 
-#define HWCLK_POLL_INTERVAL	5
+#define HWCLK_POLL_INTERVAL	50	/* ms */
 
 int atari_mste_hwclk( int op, struct rtc_time *t )
 {
@@ -212,10 +213,8 @@ int atari_tt_hwclk( int op, struct rtc_t
      * additionally the RTC_SET bit is set to prevent an update cycle.
      */
 
-    while( RTC_READ(RTC_FREQ_SELECT) & RTC_UIP ) {
-        current->state = TASK_INTERRUPTIBLE;
-        schedule_timeout(HWCLK_POLL_INTERVAL);
-    }
+    while( RTC_READ(RTC_FREQ_SELECT) & RTC_UIP )
+	msleep_interruptible(HWCLK_POLL_INTERVAL);
 
     local_irq_save(flags);
     RTC_WRITE( RTC_CONTROL, ctrl | RTC_SET );