kernel: cobalt: migrate to ktime_t

As do_gettimeofday is very old and deprecated, use ktime instead

This also fixed the old conversion to nanoseconds in a4l_init_time.
Signed-off-by: Roman Stratiienko <roman.stratiienko@globallogic.com>
[Jan: leave note on drive-by fix of a4l_init_time]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

kernel/cobalt/clock.c

@@ -350,9 +350,7 @@ EXPORT_SYMBOL_GPL(xnclock_adjust);
 
 xnticks_t xnclock_get_host_time(void)
 {
-	struct timeval tv;
-	do_gettimeofday(&tv);
-	return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000;
+	return ktime_to_ns(ktime_get_real());
 }
 EXPORT_SYMBOL_GPL(xnclock_get_host_time);
 

kernel/drivers/analogy/rtdm_helpers.c

@@ -32,11 +32,8 @@ static nanosecs_abs_t a4l_clkofs;
 void a4l_init_time(void)
 {
 	nanosecs_abs_t t1, t2;
-	struct timeval tv;
 	t1 = rtdm_clock_read();
-	do_gettimeofday(&tv);
-	t2 = 1000000000 * ((nanosecs_abs_t)tv.tv_sec) +
-		1000000 * ((nanosecs_abs_t)tv.tv_usec);
+	t2 = ktime_to_ns(ktime_get_real());
 	a4l_clkofs = t2 - t1;
 }