From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933398Ab3CYUI5 (ORCPT ); Mon, 25 Mar 2013 16:08:57 -0400 Received: from mail-pb0-f41.google.com ([209.85.160.41]:56808 "EHLO mail-pb0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933313Ab3CYUIf (ORCPT ); Mon, 25 Mar 2013 16:08:35 -0400 From: John Stultz To: lkml Cc: John Stultz , Thomas Gleixner , Richard Cochran , Prarit Bhargava Subject: [PATCH 7/8] timekeeping: Simplify tai updating from do_adjtimex Date: Mon, 25 Mar 2013 13:08:17 -0700 Message-Id: <1364242098-5977-8-git-send-email-john.stultz@linaro.org> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1364242098-5977-1-git-send-email-john.stultz@linaro.org> References: <1364242098-5977-1-git-send-email-john.stultz@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since we are taking the timekeeping locks, just go ahead and update any tai change directly, rather then dropping the lock and calling a function that will just take it again. Cc: Thomas Gleixner Cc: Richard Cochran Cc: Prarit Bhargava Signed-off-by: John Stultz --- kernel/time/timekeeping.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index d10bd73..f93f60c 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -1618,9 +1618,10 @@ EXPORT_SYMBOL_GPL(ktime_get_monotonic_offset); */ int do_adjtimex(struct timex *txc) { + struct timekeeper *tk = &timekeeper; unsigned long flags; struct timespec ts; - s32 tai, orig_tai; + s32 tai; int ret; /* Validate the data before disabling interrupts */ @@ -1640,19 +1641,17 @@ int do_adjtimex(struct timex *txc) } getnstimeofday(&ts); - orig_tai = tai = timekeeping_get_tai_offset(); raw_spin_lock_irqsave(&timekeeper_lock, flags); write_seqcount_begin(&timekeeper_seq); + tai = tk->tai_offset; ret = __do_adjtimex(txc, &ts, &tai); + __timekeeping_set_tai_offset(tk, tai); write_seqcount_end(&timekeeper_seq); raw_spin_unlock_irqrestore(&timekeeper_lock, flags); - if (tai != orig_tai) - timekeeping_set_tai_offset(tai); - return ret; } -- 1.7.10.4