timekeeping: remove unused {read,update}_persistent_clock

After arch/sh has removed the last reference to these functions,
we can remove them completely and just rely on the 64-bit time_t
based versions. This cleans up a rather ugly use of __weak
functions.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: John Stultz <john.stultz@linaro.org>

3 files changed, 3 insertions, 25 deletions

diff --git a/include/linux/timekeeping32.h b/include/linux/timekeeping32.h
index a502616f7e1c..0036ff314ac5 100644
--- a/include/linux/timekeeping32.h
+++ b/include/linux/timekeeping32.h
@@ -52,10 +52,4 @@ static inline void getboottime(struct timespec *ts)
         *ts = timespec64_to_timespec(ts64);
 }
 
-/*
- * Persistent clock related interfaces
- */
-extern void read_persistent_clock(struct timespec *ts);
-extern int update_persistent_clock(struct timespec now);
-
 #endif
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index c5e0cba3b39c..e23be418d015 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -555,17 +555,9 @@ static void sync_rtc_clock(void)
 }
 
 #ifdef CONFIG_GENERIC_CMOS_UPDATE
-int __weak update_persistent_clock(struct timespec now)
-{
-        return -ENODEV;
-}
-
 int __weak update_persistent_clock64(struct timespec64 now64)
 {
-        struct timespec now;
-
-        now = timespec64_to_timespec(now64);
-        return update_persistent_clock(now);
+        return -ENODEV;
 }
 #endif
 
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 2d110c948805..eb09be4871b3 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1467,7 +1467,7 @@ u64 timekeeping_max_deferment(void)
 }
 
 /**
- * read_persistent_clock -  Return time from the persistent clock.
+ * read_persistent_clock64 -  Return time from the persistent clock.
  *
  * Weak dummy function for arches that do not yet support it.
  * Reads the time from the battery backed persistent clock.
@@ -1475,20 +1475,12 @@ u64 timekeeping_max_deferment(void)
  *
  *  XXX - Do be sure to remove it once all arches implement it.
  */
-void __weak read_persistent_clock(struct timespec *ts)
+void __weak read_persistent_clock64(struct timespec64 *ts)
 {
         ts->tv_sec = 0;
         ts->tv_nsec = 0;
 }
 
-void __weak read_persistent_clock64(struct timespec64 *ts64)
-{
-        struct timespec ts;
-
-        read_persistent_clock(&ts);
-        *ts64 = timespec_to_timespec64(ts);
-}
-
 /**
  * read_persistent_wall_and_boot_offset - Read persistent clock, and also offset
  *                                        from the boot.