From 094aa1881fdc1b8889b442eb3511b31f3ec2b762 Mon Sep 17 00:00:00 2001 From: Richard Cochran Date: Tue, 1 Feb 2011 13:52:20 +0000 Subject: ntp: Add ADJ_SETOFFSET mode bit This patch adds a new mode bit into the timex structure. When set, the bit instructs the kernel to add the given time value to the current time. Signed-off-by: Richard Cochran Acked-by: John Stultz LKML-Reference: <20110201134320.688829863@linutronix.de> Signed-off-by: Thomas Gleixner --- kernel/time/ntp.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'kernel/time') diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index ed8cfdf16983..5ac593267a26 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -648,6 +648,17 @@ int do_adjtimex(struct timex *txc) hrtimer_cancel(&leap_timer); } + if (txc->modes & ADJ_SETOFFSET) { + struct timespec delta; + if ((unsigned long)txc->time.tv_usec >= NSEC_PER_SEC) + return -EINVAL; + delta.tv_sec = txc->time.tv_sec; + delta.tv_nsec = txc->time.tv_usec; + if (!(txc->modes & ADJ_NANO)) + delta.tv_nsec *= 1000; + timekeeping_inject_offset(&delta); + } + getnstimeofday(&ts); write_seqlock_irq(&xtime_lock); -- cgit v1.2.3