time: sh: convert to use arch_getoffset() infrastructure

Convert sh to use GENERIC_TIME via the arch_getoffset() infrastructure.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

5 files changed, 11 insertions, 113 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 7e96adea9602..6f91478826d5 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -75,7 +75,7 @@ config GENERIC_IOMAP
         bool
 
 config GENERIC_TIME
-        def_bool n
+        def_bool y
 
 config GENERIC_CLOCKEVENTS
         def_bool n
diff --git a/arch/sh/include/asm/timer.h b/arch/sh/include/asm/timer.h
index 8f80a55c04ae..9c968d19cb9b 100644
--- a/arch/sh/include/asm/timer.h
+++ b/arch/sh/include/asm/timer.h
@@ -9,7 +9,7 @@ struct sys_timer_ops {
         int (*init)(void);
         int (*start)(void);
         int (*stop)(void);
-#ifndef CONFIG_GENERIC_TIME
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
         unsigned long (*get_offset)(void);
 #endif
 };
@@ -26,7 +26,7 @@ struct sys_timer {
 extern struct sys_timer tmu_timer, mtu2_timer;
 extern struct sys_timer *sys_timer;
 
-#ifndef CONFIG_GENERIC_TIME
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
 static inline unsigned long get_timer_offset(void)
 {
         return sys_timer->ops->get_offset();
diff --git a/arch/sh/kernel/time_32.c b/arch/sh/kernel/time_32.c
index 457332116e17..9d34dff14994 100644
--- a/arch/sh/kernel/time_32.c
+++ b/arch/sh/kernel/time_32.c
@@ -83,65 +83,12 @@ static int __init rtc_generic_init(void)
 }
 module_init(rtc_generic_init);
 
-#ifndef CONFIG_GENERIC_TIME
-void do_gettimeofday(struct timeval *tv)
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
+u32 arch_gettimeoffset(void)
 {
-        unsigned long flags;
-        unsigned long seq;
-        unsigned long usec, sec;
-
-        do {
-                /*
-                 * Turn off IRQs when grabbing xtime_lock, so that
-                 * the sys_timer get_offset code doesn't have to handle it.
-                 */
-                seq = read_seqbegin_irqsave(&xtime_lock, flags);
-                usec = get_timer_offset();
-                sec = xtime.tv_sec;
-                usec += xtime.tv_nsec / NSEC_PER_USEC;
-        } while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
-
-        while (usec >= 1000000) {
-                usec -= 1000000;
-                sec++;
-        }
-
-        tv->tv_sec = sec;
-        tv->tv_usec = usec;
-}
-EXPORT_SYMBOL(do_gettimeofday);
-
-int do_settimeofday(struct timespec *tv)
-{
-        time_t wtm_sec, sec = tv->tv_sec;
-        long wtm_nsec, nsec = tv->tv_nsec;
-
-        if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
-                return -EINVAL;
-
-        write_seqlock_irq(&xtime_lock);
-        /*
-         * This is revolting. We need to set "xtime" correctly. However, the
-         * value in this location is the value at the most recent update of
-         * wall time.  Discover what correction gettimeofday() would have
-         * made, and then undo it!
-         */
-        nsec -= get_timer_offset() * NSEC_PER_USEC;
-
-        wtm_sec  = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
-        wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
-
-        set_normalized_timespec(&xtime, sec, nsec);
-        set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
-
-        ntp_clear();
-        write_sequnlock_irq(&xtime_lock);
-        clock_was_set();
-
-        return 0;
+        return get_timer_offset() * 1000;
 }
-EXPORT_SYMBOL(do_settimeofday);
-#endif /* !CONFIG_GENERIC_TIME */
+#endif /* CONFIG_ARCH_USES_GETTIMEOFFSET */
 
 /* last time the RTC clock got updated */
 static long last_rtc_update;
@@ -238,7 +185,7 @@ struct clocksource clocksource_sh = {
         .name           = "SuperH",
 };
 
-#ifdef CONFIG_GENERIC_TIME
+#ifndef CONFIG_ARCH_USES_GETTIMEOFFSET
 unsigned long long sched_clock(void)
 {
         unsigned long long cycles;
diff --git a/arch/sh/kernel/time_64.c b/arch/sh/kernel/time_64.c
index 988c77c37231..f4f5e8ad5bec 100644
--- a/arch/sh/kernel/time_64.c
+++ b/arch/sh/kernel/time_64.c
@@ -144,59 +144,10 @@ static unsigned long usecs_since_tick(void)
         return result;
 }
 
-void do_gettimeofday(struct timeval *tv)
+u32 arch_gettimeoffset(void)
 {
-        unsigned long flags;
-        unsigned long seq;
-        unsigned long usec, sec;
-
-        do {
-                seq = read_seqbegin_irqsave(&xtime_lock, flags);
-                usec = usecs_since_tick();
-                sec = xtime.tv_sec;
-                usec += xtime.tv_nsec / 1000;
-        } while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
-
-        while (usec >= 1000000) {
-                usec -= 1000000;
-                sec++;
-        }
-
-        tv->tv_sec = sec;
-        tv->tv_usec = usec;
-}
-EXPORT_SYMBOL(do_gettimeofday);
-
-int do_settimeofday(struct timespec *tv)
-{
-        time_t wtm_sec, sec = tv->tv_sec;
-        long wtm_nsec, nsec = tv->tv_nsec;
-
-        if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
-                return -EINVAL;
-
-        write_seqlock_irq(&xtime_lock);
-        /*
-         * This is revolting. We need to set "xtime" correctly. However, the
-         * value in this location is the value at the most recent update of
-         * wall time.  Discover what correction gettimeofday() would have
-         * made, and then undo it!
-         */
-        nsec -= 1000 * usecs_since_tick();
-
-        wtm_sec  = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
-        wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
-
-        set_normalized_timespec(&xtime, sec, nsec);
-        set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
-
-        ntp_clear();
-        write_sequnlock_irq(&xtime_lock);
-        clock_was_set();
-
-        return 0;
+        return usecs_since_tick() * 1000;
 }
-EXPORT_SYMBOL(do_settimeofday);
 
 /* Dummy RTC ops */
 static void null_rtc_get_time(struct timespec *tv)
diff --git a/arch/sh/kernel/timers/timer-mtu2.c b/arch/sh/kernel/timers/timer-mtu2.c
index 9b0ef0126479..8a1dcc2c3723 100644
--- a/arch/sh/kernel/timers/timer-mtu2.c
+++ b/arch/sh/kernel/timers/timer-mtu2.c
@@ -191,7 +191,7 @@ struct sys_timer_ops mtu2_timer_ops = {
         .init           = mtu2_timer_init,
         .start          = mtu2_timer_start,
         .stop           = mtu2_timer_stop,
-#ifndef CONFIG_GENERIC_TIME
+#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
         .get_offset     = mtu2_timer_get_offset,
 #endif
 };