On Wed, 19 May 2010, Thomas Gleixner wrote: > On Tue, 18 May 2010, David Daney wrote: > > > The 'mult' element of struct clock_event_device must never be wider > > than 32-bits. If it were, it would get truncated when used by > > clockevent_delta2ns() when this calls do_div(). > > > > We meet the requirement by ensuring that the relationship: > > > > (mips_hpt_frequency >> (32 - shift)) < NSEC_PER_SEC > > > > Always holds. > > clocks_calc_mult_shift() is your friend :) There are wrapper functions for clock sources and clock events as well: clocksource_calc_mult_shift() clockevents_calc_mult_shift() Thanks, tglx
