8 files changed, 48 insertions, 31 deletions

diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index 09be0c3c9069..b0190b41cb33 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -70,7 +70,7 @@ EXPORT_SYMBOL(profile_pc);
 #endif
 
 #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
-u32 arch_gettimeoffset(void)
+static u32 arm_gettimeoffset(void)
 {
 	if (system_timer->offset != NULL)
 		return system_timer->offset() * 1000;
@@ -164,6 +164,10 @@ device_initcall(timer_init_syscore_ops);
 
 void __init time_init(void)
 {
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
+	arch_gettimeoffset = arm_gettimeoffset;
+#endif
+
 	system_timer = machine_desc->timer;
 	system_timer->init();
 	sched_clock_postinit();
diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c
index 2310b249675f..3126b920a4a5 100644
--- a/arch/blackfin/kernel/time.c
+++ b/arch/blackfin/kernel/time.c
@@ -85,7 +85,7 @@ time_sched_init(irqreturn_t(*timer_routine) (int, void *))
 /*
  * Should return useconds since last timer tick
  */
-u32 arch_gettimeoffset(void)
+static u32 blackfin_gettimeoffset(void)
 {
 	unsigned long offset;
 	unsigned long clocks_per_jiffy;
@@ -141,6 +141,10 @@ void read_persistent_clock(struct timespec *ts)
 
 void __init time_init(void)
 {
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
+	arch_gettimeoffset = blackfin_gettimeoffset;
+#endif
+
 #ifdef CONFIG_RTC_DRV_BFIN
 	/* [#2663] hack to filter junk RTC values that would cause
 	 * userspace to have to deal with time values greater than
diff --git a/arch/cris/arch-v10/kernel/time.c b/arch/cris/arch-v10/kernel/time.c
index 162892f24a20..fce7c541d70d 100644
--- a/arch/cris/arch-v10/kernel/time.c
+++ b/arch/cris/arch-v10/kernel/time.c
@@ -55,9 +55,9 @@ unsigned long get_ns_in_jiffie(void)
 	return ns;
 }
 
-unsigned long do_slow_gettimeoffset(void)
+static u32 cris_v10_gettimeoffset(void)
 {
-	unsigned long count;
+	u32 count;
 
 	/* The timer interrupt comes from Etrax timer 0. In order to get
 	 * better precision, we check the current value. It might have
@@ -191,6 +191,8 @@ static struct irqaction irq2  = {
 void __init
 time_init(void)
 {	
+	arch_gettimeoffset = cris_v10_gettimeoffset;
+
 	/* probe for the RTC and read it if it exists 
 	 * Before the RTC can be probed the loops_per_usec variable needs 
 	 * to be initialized to make usleep work. A better value for 
diff --git a/arch/cris/kernel/time.c b/arch/cris/kernel/time.c
index b063c9217b5c..fe6acdabbc8d 100644
--- a/arch/cris/kernel/time.c
+++ b/arch/cris/kernel/time.c
@@ -39,17 +39,6 @@
 extern unsigned long loops_per_jiffy; /* init/main.c */
 unsigned long loops_per_usec;
 
-
-#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
-extern unsigned long do_slow_gettimeoffset(void);
-static unsigned long (*do_gettimeoffset)(void) = do_slow_gettimeoffset;
-
-u32 arch_gettimeoffset(void)
-{
-	return do_gettimeoffset();
-}
-#endif
-
 int set_rtc_mmss(unsigned long nowtime)
 {
 	D(printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime));
diff --git a/arch/m32r/kernel/time.c b/arch/m32r/kernel/time.c
index 84dd04048db9..1a15f81ea1bd 100644
--- a/arch/m32r/kernel/time.c
+++ b/arch/m32r/kernel/time.c
@@ -57,7 +57,7 @@ extern void smp_local_timer_interrupt(void);
 
 static unsigned long latch;
 
-u32 arch_gettimeoffset(void)
+static u32 m32r_gettimeoffset(void)
 {
 	unsigned long  elapsed_time = 0;  /* [us] */
 
@@ -165,6 +165,8 @@ void read_persistent_clock(struct timespec *ts)
 
 void __init time_init(void)
 {
+	arch_gettimeoffset = m32r_gettimeoffset;
+
 #if defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_XNUX2) \
 	|| defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_M32700) \
 	|| defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)
diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index 5d0bcaad2e55..c2994c8c30d5 100644
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -80,14 +80,9 @@ void read_persistent_clock(struct timespec *ts)
 	}
 }
 
-void __init time_init(void)
-{
-	mach_sched_init(timer_interrupt);
-}
-
 #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
 
-u32 arch_gettimeoffset(void)
+static u32 m68k_gettimeoffset(void)
 {
 	return mach_gettimeoffset() * 1000;
 }
@@ -106,3 +101,12 @@ static int __init rtc_init(void)
 module_init(rtc_init);
 
 #endif /* CONFIG_ARCH_USES_GETTIMEOFFSET */
+
+void __init time_init(void)
+{
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
+	arch_gettimeoffset = m68k_gettimeoffset;
+#endif
+
+	mach_sched_init(timer_interrupt);
+}
diff --git a/include/linux/time.h b/include/linux/time.h
index 4d358e9d10f1..05e32a72103c 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -142,9 +142,7 @@ void timekeeping_inject_sleeptime(struct timespec *delta);
  * finer then tick granular time.
  */
 #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
-extern u32 arch_gettimeoffset(void);
-#else
-static inline u32 arch_gettimeoffset(void) { return 0; }
+extern u32 (*arch_gettimeoffset)(void);
 #endif
 
 extern void do_gettimeofday(struct timeval *tv);
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index cbc6acb0db3f..8ed934601587 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -135,6 +135,20 @@ static void tk_setup_internals(struct timekeeper *tk, struct clocksource *clock)
 }
 
 /* Timekeeper helper functions. */
+
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
+u32 (*arch_gettimeoffset)(void);
+
+u32 get_arch_timeoffset(void)
+{
+	if (likely(arch_gettimeoffset))
+		return arch_gettimeoffset();
+	return 0;
+}
+#else
+static inline u32 get_arch_timeoffset(void) { return 0; }
+#endif
+
 static inline s64 timekeeping_get_ns(struct timekeeper *tk)
 {
 	cycle_t cycle_now, cycle_delta;
@@ -151,8 +165,8 @@ static inline s64 timekeeping_get_ns(struct timekeeper *tk)
 	nsec = cycle_delta * tk->mult + tk->xtime_nsec;
 	nsec >>= tk->shift;
 
-	/* If arch requires, add in gettimeoffset() */
-	return nsec + arch_gettimeoffset();
+	/* If arch requires, add in get_arch_timeoffset() */
+	return nsec + get_arch_timeoffset();
 }
 
 static inline s64 timekeeping_get_ns_raw(struct timekeeper *tk)
@@ -171,8 +185,8 @@ static inline s64 timekeeping_get_ns_raw(struct timekeeper *tk)
 	/* convert delta to nanoseconds. */
 	nsec = clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift);
 
-	/* If arch requires, add in gettimeoffset() */
-	return nsec + arch_gettimeoffset();
+	/* If arch requires, add in get_arch_timeoffset() */
+	return nsec + get_arch_timeoffset();
 }
 
 static RAW_NOTIFIER_HEAD(pvclock_gtod_chain);
@@ -254,8 +268,8 @@ static void timekeeping_forward_now(struct timekeeper *tk)
 
 	tk->xtime_nsec += cycle_delta * tk->mult;
 
-	/* If arch requires, add in gettimeoffset() */
-	tk->xtime_nsec += (u64)arch_gettimeoffset() << tk->shift;
+	/* If arch requires, add in get_arch_timeoffset() */
+	tk->xtime_nsec += (u64)get_arch_timeoffset() << tk->shift;
 
 	tk_normalize_xtime(tk);