From 05e7ff7da78bad3edc1290ed86b4a37da72ced62 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Fri, 11 Sep 2009 10:28:31 +0200 Subject: [S390] introduce get_clock_monotonic Introduce get_clock_monotonic() function which can be used to get a (fast) timestamp. Resolution is the same as for get_clock(). The only difference is that the timestamps are monotonic and don't jump backward or forward. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/time.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/s390/kernel/time.c') diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c index d4c8e9c47c81..54e327e9af04 100644 --- a/arch/s390/kernel/time.c +++ b/arch/s390/kernel/time.c @@ -60,6 +60,7 @@ #define TICK_SIZE tick u64 sched_clock_base_cc = -1; /* Force to data section. */ +EXPORT_SYMBOL_GPL(sched_clock_base_cc); static DEFINE_PER_CPU(struct clock_event_device, comparators); @@ -68,7 +69,7 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators); */ unsigned long long notrace sched_clock(void) { - return ((get_clock_xt() - sched_clock_base_cc) * 125) >> 9; + return (get_clock_monotonic() * 125) >> 9; } /* -- cgit v1.2.2