From: Jeff D. <jd...@ad...> - 2007-09-12 21:16:52
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Add clocksource support. Signed-off-by: Jeff Dike <jd...@li...> -- arch/um/kernel/time.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) Index: linux-2.6.22/arch/um/kernel/time.c =================================================================== --- linux-2.6.22.orig/arch/um/kernel/time.c 2007-09-12 15:12:11.000000000 -0400 +++ linux-2.6.22/arch/um/kernel/time.c 2007-09-12 15:12:35.000000000 -0400 @@ -97,6 +97,21 @@ static irqreturn_t um_timer(int irq, voi return IRQ_HANDLED; } +static cycle_t itimer_read(void) +{ + return os_nsecs(); +} + +static struct clocksource itimer_clocksource = { + .name = "itimer", + .rating = 300, + .read = itimer_read, + .mask = CLOCKSOURCE_MASK(64), + .mult = 1, + .shift = 0, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + static void __init setup_itimer(void) { int err; @@ -108,6 +123,12 @@ static void __init setup_itimer(void) printk(KERN_ERR "register_timer : request_irq failed - " "errno = %d\n", -err); + err = clocksource_register(&itimer_clocksource); + if (err) { + printk(KERN_ERR "clocksource_register returned %d\n", err); + return; + } + itimer_clockevent.mult = div_sc(HZ, NSEC_PER_SEC, 32); itimer_clockevent.max_delta_ns = clockevent_delta2ns(60 * HZ, &itimer_clockevent); |