ntp/pps: replace getnstime_raw_and_real with 64-bit version

There is exactly one caller of getnstime_raw_and_real in the kernel,
which is the pps_get_ts function. This changes the caller and
the implementation to work on timespec64 types rather than timespec,
to avoid the time_t overflow on 32-bit architectures.

For consistency with the other new functions (ktime_get_seconds,
ktime_get_real_*, ...), I'm renaming the function to
ktime_get_raw_and_real_ts64.

We still need to convert from the internal 64-bit type to 32 bit
types in the caller, but this conversion is now pushed out from
getnstime_raw_and_real to pps_get_ts. A follow-up patch changes
the remaining pps code to completely avoid the conversion.

Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/include/linux/pps_kernel.h b/include/linux/pps_kernel.h
index 1d2cd21242e8..b2fbd62ab18d 100644
--- a/include/linux/pps_kernel.h
+++ b/include/linux/pps_kernel.h
@@ -115,7 +115,12 @@ static inline void timespec_to_pps_ktime(struct pps_ktime *kt,
 
 static inline void pps_get_ts(struct pps_event_time *ts)
 {
-	getnstime_raw_and_real(&ts->ts_raw, &ts->ts_real);
+	struct timespec64 raw, real;
+
+	ktime_get_raw_and_real_ts64(&raw, &real);
+
+	ts->ts_raw = timespec64_to_timespec(raw);
+	ts->ts_real = timespec64_to_timespec(real);
 }
 
 #else /* CONFIG_NTP_PPS */