[PATCH] Using msleep() instead of HZ

Use msleep() in a few places.

Signed-off-by: Luca Falavigna <dktrkranz@gmail.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index ff4f098..d8f9e94 100644 (file)
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -78,6 +78,7 @@
 #include <linux/sysctl.h>
 #include <linux/wait.h>
 #include <linux/bcd.h>
+#include <linux/delay.h>
 
 #include <asm/current.h>
 #include <asm/uaccess.h>
@@ -894,7 +895,6 @@ static int __init rtc_init(void)
        struct proc_dir_entry *ent;
 #if defined(__alpha__) || defined(__mips__)
        unsigned int year, ctrl;
-       unsigned long uip_watchdog;
        char *guess = NULL;
 #endif
 #ifdef __sparc__
@@ -1000,12 +1000,8 @@ no_irq:
        /* 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);
@@ -1213,7 +1209,6 @@ static int rtc_proc_open(struct inode *inode, struct file *file)
 
 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;
@@ -1221,7 +1216,7 @@ void rtc_get_rtc_time(struct rtc_time *rtc_tm)
 
        /*
         * 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 
@@ -1230,10 +1225,7 @@ void rtc_get_rtc_time(struct rtc_time *rtc_tm)
         */
 
        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

diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index 98d62d8..3467097 100644 (file)
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -9,6 +9,7 @@
 #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
@@ -26,7 +27,7 @@ static DECLARE_MUTEX(probe_sem);
  */
 unsigned long probe_irq_on(void)
 {
-       unsigned long val, delay;
+       unsigned long val;
        irq_desc_t *desc;
        unsigned int i;
 
@@ -45,8 +46,7 @@ unsigned long probe_irq_on(void)
        }
 
        /* 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
@@ -68,8 +68,7 @@ unsigned long probe_irq_on(void)
        /*
         * 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