timekeeping: Use ktime_t based data for ktime_get()

Speed up ktime_get() by using ktime_t based data. Text size shrinks by
64 bytes on x8664.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 86a92476c027..d5be1425cc03 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -407,18 +407,19 @@ ktime_t ktime_get(void)
 {
         struct timekeeper *tk = &tk_core.timekeeper;
         unsigned int seq;
-        s64 secs, nsecs;
+        ktime_t base;
+        s64 nsecs;
 
         WARN_ON(timekeeping_suspended);
 
         do {
                 seq = read_seqcount_begin(&tk_core.seq);
-                secs = tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
-                nsecs = timekeeping_get_ns(tk) + tk->wall_to_monotonic.tv_nsec;
+                base = tk->base_mono;
+                nsecs = timekeeping_get_ns(tk);
 
         } while (read_seqcount_retry(&tk_core.seq, seq));
 
-        return ktime_set(secs, nsecs);
+        return ktime_add_ns(base, nsecs);
 }
 EXPORT_SYMBOL_GPL(ktime_get);