Commit d2cb0e6e authored Nov 05, 2007 by Christian Borntraeger Committed by Martin Schwidefsky Nov 05, 2007

[S390] tod clock: announce clocksource as perfect



The Time of Day clock is the standard time source for s390. It is
- monotonic
- allows very fast reading
- architecture guarantees at least microsecond stepping
- available as part of the architecture

We should announce the rate of tod as 400 to be in sync with the
description found in clocksource.h:
"400-499:Perfect The ideal clocksource. A must-use where available."

This change will prefer tod over less reliable clock sources.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent 69d39d66

arch/s390/kernel/time.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -307,7 +307,7 @@ static cycle_t read_tod_clock(void)

		static struct clocksource clocksource_tod = {
		.name = "tod",
		.rating = 100,
		.rating = 400,
		.read = read_tod_clock,
		.mask = -1ULL,
		.mult = 1000,