[patch 15/55] timekeeping: Use ktime_t based data for ktime_get()

[Thomas Gleixner]

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

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 kernel/time/timekeeping.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

Index: tip/kernel/time/timekeeping.c
===================================================================
--- tip.orig/kernel/time/timekeeping.c
+++ tip/kernel/time/timekeeping.c
@@ -406,18 +406,19 @@ 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);
 


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