On 02/18/2013 12:30 AM, Afzal Mohammed wrote: > Register percpu local timer for scheduler tick in the case of one core > SMP configuration. In other cases - secondary cpu's as well as boot > cpu's having more than one core, this is being registered as per > existing boot flow, with a difference that they happens after delay > calibration. Registering the clock for tick in case of one core should > be done before Kernel calibrates delay (this is required to boot, > unless local timer is the only one registered for tick). Registering > twd local timer at init_time (which platforms are doing now) helps > achieve that with the proposed change. > > This helps in an almost booting Kernel (minimal) by only relying on > ARM parts for an A9 one core SMP. > > Signed-off-by: Afzal Mohammed <afzal@xxxxxx> > --- > arch/arm/kernel/smp_twd.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c > index 616268c..118f4f2 100644 > --- a/arch/arm/kernel/smp_twd.c > +++ b/arch/arm/kernel/smp_twd.c > @@ -335,6 +335,9 @@ static int __init twd_local_timer_common_register(struct device_node *np) > > twd_get_clock(np); > > + if (num_possible_cpus() == 1) > + twd_timer_setup(evt); > + Shouldn't this be fixed in the core code, so the same issue is fixed for all timers? Rob > return 0; > > out_irq: > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
