[MIPS] Deforest the function pointer jungle in the time code.

[safe/jmp/linux-2.6] / arch / mips / kernel / time.c

diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index d48d1d5..9bbbd9b 100644 (file)
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/param.h>
+#include <linux/profile.h>
 #include <linux/time.h>
 #include <linux/timex.h>
 #include <linux/smp.h>
@@ -48,24 +49,23 @@
  * forward reference
  */
 DEFINE_SPINLOCK(rtc_lock);
+EXPORT_SYMBOL(rtc_lock);
 
-/*
- * By default we provide the null RTC ops
- */
-static unsigned long null_rtc_get_time(void)
+int __weak rtc_mips_set_time(unsigned long sec)
 {
-       return mktime(2000, 1, 1, 0, 0, 0);
+       return 0;
 }
+EXPORT_SYMBOL(rtc_mips_set_time);
 
-static int null_rtc_set_time(unsigned long sec)
+int __weak rtc_mips_set_mmss(unsigned long nowtime)
 {
-       return 0;
+       return rtc_mips_set_time(nowtime);
 }
 
-unsigned long (*rtc_mips_get_time)(void) = null_rtc_get_time;
-int (*rtc_mips_set_time)(unsigned long) = null_rtc_set_time;
-int (*rtc_mips_set_mmss)(unsigned long);
-
+int update_persistent_clock(struct timespec now)
+{
+       return rtc_mips_set_mmss(now.tv_sec);
+}
 
 /* how many counter cycles in a jiffy */
 static unsigned long cycles_per_jiffy __read_mostly;
@@ -124,9 +124,6 @@ static void __init c0_hpt_timer_init(void)
 int (*mips_timer_state)(void);
 void (*mips_timer_ack)(void);
 
-/* last time when xtime and rtc are sync'ed up */
-static long last_rtc_update;
-
 /*
  * local_timer_interrupt() does profiling and process accounting
  * on a per-CPU basis.
@@ -158,23 +155,6 @@ irqreturn_t timer_interrupt(int irq, void *dev_id)
         */
        do_timer(1);
 
-       /*
-        * If we have an externally synchronized Linux clock, then update
-        * CMOS clock accordingly every ~11 minutes. rtc_mips_set_time() has to be
-        * called as close as possible to 500 ms before the new second starts.
-        */
-       if (ntp_synced() &&
-           xtime.tv_sec > last_rtc_update + 660 &&
-           (xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 &&
-           (xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) {
-               if (rtc_mips_set_mmss(xtime.tv_sec) == 0) {
-                       last_rtc_update = xtime.tv_sec;
-               } else {
-                       /* do it again in 60 s */
-                       last_rtc_update = xtime.tv_sec - 600;
-               }
-       }
-
        write_sequnlock(&xtime_lock);
 
        /*
@@ -262,21 +242,18 @@ asmlinkage void ll_local_timer_interrupt(int irq)
 /*
  * time_init() - it does the following things.
  *
- * 1) board_time_init() -
+ * 1) plat_time_init() -
  *     a) (optional) set up RTC routines,
  *      b) (optional) calibrate and set the mips_hpt_frequency
  *         (only needed if you intended to use cpu counter as timer interrupt
  *          source)
- * 2) setup xtime based on rtc_mips_get_time().
- * 3) calculate a couple of cached variables for later usage
- * 4) plat_timer_setup() -
+ * 2) calculate a couple of cached variables for later usage
+ * 3) plat_timer_setup() -
  *     a) (optional) over-write any choices made above by time_init().
  *     b) machine specific code should setup the timer irqaction.
  *     c) enable the timer interrupt
  */
 
-void (*board_time_init)(void);
-
 unsigned int mips_hpt_frequency;
 
 static struct irqaction timer_irqaction = {
@@ -356,19 +333,13 @@ static void __init init_mips_clocksource(void)
        clocksource_register(&clocksource_mips);
 }
 
-void __init time_init(void)
+void __init __weak plat_time_init(void)
 {
-       if (board_time_init)
-               board_time_init();
-
-       if (!rtc_mips_set_mmss)
-               rtc_mips_set_mmss = rtc_mips_set_time;
-
-       xtime.tv_sec = rtc_mips_get_time();
-       xtime.tv_nsec = 0;
+}
 
-       set_normalized_timespec(&wall_to_monotonic,
-                               -xtime.tv_sec, -xtime.tv_nsec);
+void __init time_init(void)
+{
+       plat_time_init();
 
        /* Choose appropriate high precision timer routines.  */
        if (!cpu_has_counter && !clocksource_mips.read)
@@ -474,7 +445,4 @@ void to_tm(unsigned long tim, struct rtc_time *tm)
        tm->tm_wday = (gday + 4) % 7;   /* 1970/1/1 was Thursday */
 }
 
-EXPORT_SYMBOL(rtc_lock);
 EXPORT_SYMBOL(to_tm);
-EXPORT_SYMBOL(rtc_mips_set_time);
-EXPORT_SYMBOL(rtc_mips_get_time);