From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752746AbaGPVER (ORCPT ); Wed, 16 Jul 2014 17:04:17 -0400 Received: from www.linutronix.de ([62.245.132.108]:59657 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752703AbaGPVEN (ORCPT ); Wed, 16 Jul 2014 17:04:13 -0400 Message-Id: <20140716205053.514827613@linutronix.de> User-Agent: quilt/0.63-1 Date: Wed, 16 Jul 2014 21:04:12 -0000 From: Thomas Gleixner To: LKML Cc: John Stultz , Peter Zijlstra Subject: [patch V2 16/64] timekeeping: Use ktime_t based data for ktime_get() References: <20140716205018.175419210@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Disposition: inline; filename=timekeeping-use-ktime-based-for-ktime-get.patch X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Speed up ktime_get() by using ktime_t based data. Text size shrinks by 64 bytes on x8664. Signed-off-by: Thomas Gleixner --- 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 @@ -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);