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    SubjectRe: [patch 2/2] introduce vdso on s390
    On Wed, Oct 15, 2008 at 07:45:08PM +0200, Martin Schwidefsky wrote:
    > +void update_vsyscall(struct timespec *wall_time, struct clocksource *clock)
    > +{
    > + if (clock != &clocksource_tod)
    > + return;
    > +
    > + /* Make userspace gettimeofday spin until we're done. */
    > + ++vdso_data->tb_update_count;
    > + smp_mb();
    > + vdso_data->xtime_tod_stamp = clock->cycle_last;
    > + vdso_data->xtime_clock_sec = xtime.tv_sec;
    > + vdso_data->xtime_clock_nsec = xtime.tv_nsec;
    > + vdso_data->wtom_clock_sec = wall_to_monotonic.tv_sec;
    > + vdso_data->wtom_clock_nsec = wall_to_monotonic.tv_nsec;
    > + smp_wmb();

    Different barriers?

    > + ++(vdso_data->tb_update_count);

    Why ++(...)?

    Bastian

    --
    Either one of us, by himself, is expendable. Both of us are not.
    -- Kirk, "The Devil in the Dark", stardate 3196.1


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