[PATCH] Using msleep() instead of HZ

Use msleep() in a few places.

Signed-off-by: Luca Falavigna <[e-mail]>
Acked-by: Ingo Molnar <[e-mail]>
Acked-by: Jeff Garzik <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/char/rtc.c

···
 #include <linux/sysctl.h>
 #include <linux/wait.h>
 #include <linux/bcd.h>
+#include <linux/delay.h>
 
 #include <asm/current.h>
 #include <asm/uaccess.h>
···
 	struct proc_dir_entry *ent;
 #if defined(__alpha__) || defined(__mips__)
 	unsigned int year, ctrl;
-	unsigned long uip_watchdog;
 	char *guess = NULL;
 #endif
 #ifdef __sparc__
···
 	/* Each operating system on an Alpha uses its own epoch.
 	   Let's try to guess which one we are using now. */
 	
-	uip_watchdog = jiffies;
 	if (rtc_is_updating() != 0)
-		while (jiffies - uip_watchdog < 2*HZ/100) { 
-			barrier();
-			cpu_relax();
-		}
+		msleep(20);
 	
 	spin_lock_irq(&rtc_lock);
 	year = CMOS_READ(RTC_YEAR);
···
 
 void rtc_get_rtc_time(struct rtc_time *rtc_tm)
 {
-	unsigned long uip_watchdog = jiffies;
 	unsigned char ctrl;
 #ifdef CONFIG_MACH_DECSTATION
 	unsigned int real_year;
···
 
 	/*
 	 * read RTC once any update in progress is done. The update
-	 * can take just over 2ms. We wait 10 to 20ms. There is no need to
+	 * can take just over 2ms. We wait 20ms. There is no need to
 	 * to poll-wait (up to 1s - eeccch) for the falling edge of RTC_UIP.
 	 * If you need to know *exactly* when a second has started, enable
 	 * periodic update complete interrupts, (via ioctl) and then 
···
 	 */
 
 	if (rtc_is_updating() != 0)
-		while (jiffies - uip_watchdog < 2*HZ/100) {
-			barrier();
-			cpu_relax();
-		}
+		msleep(20);
 
 	/*
 	 * Only the values that we read from the RTC are set. We leave

kernel/irq/autoprobe.c

···
 #include <linux/irq.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/delay.h>
 
 /*
  * Autodetection depends on the fact that any interrupt that
···
  */
 unsigned long probe_irq_on(void)
 {
-	unsigned long val, delay;
+	unsigned long val;
 	irq_desc_t *desc;
 	unsigned int i;
 
···
 	}
 
 	/* Wait for longstanding interrupts to trigger. */
-	for (delay = jiffies + HZ/50; time_after(delay, jiffies); )
-		/* about 20ms delay */ barrier();
+	msleep(20);
 
 	/*
 	 * enable any unassigned irqs
···
 	/*
 	 * Wait for spurious interrupts to trigger
 	 */
-	for (delay = jiffies + HZ/10; time_after(delay, jiffies); )
-		/* about 100ms delay */ barrier();
+	msleep(100);
 
 	/*
 	 * Now filter out any obviously spurious interrupts