Commit-ID: a016a5bd62e29a738531d9d4d925037a1fdb52f5
Gitweb: http://git.kernel.org/tip/a016a5bd62e29a738531d9d4d925037a1fdb52f5
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Wed, 16 Jul 2014 21:04:12 +0000
Committer: John Stultz <john.stultz@xxxxxxxxxx>
CommitDate: Wed, 23 Jul 2014 10:17:58 -0700
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@xxxxxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
kernel/time/timekeeping.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 86a9247..d5be142 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);
--
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