On 01/09/13 06:46, Mark Rutland wrote: > This is an updated version of the series I posted back in December: > http://lists.infradead.org/pipermail/linux-arm-kernel/2012-December/137929.html > > Changes since v1: > * Drop removal of guards in smp.c > * Removed useless evt->evt_handler check in tick_receive_broadcast > * Fix up tick_receive_broadcast when !GENERIC_CLOCKEVENTS_BROADCAST > * Fix checkpatch issues (multi-line strings) > > Thanks go to Stephen Boyd and Santosh Shilimkar for their commments. > > In some SMP systems, cpu-local timers may stop delivering interrupts > when in low power states, or not all CPUs may have local timers. To > support these systems we have a mechanism for broadcasting timer ticks > to other CPUs. This mechanism relies on the struct > clock_event_device::broadcast function pointer, which is a > driver-specific mechanism for broadcasting ticks to other CPUs. > > As the broadcast mechanism is architecture-specific, placing the > broadcast function on struct clock_event_device ties each driver to a > single architecture. Additionally the driver or architecture backend > must handle the routing of broadcast ticks to the correct > clock_event_device, leading to duplication of the list of active > clock_event_devices. > > These patches introduce a generic mechanism for handling the receipt of > timer broadcasts, and an optional architecture-specific broadcast > function which allows drivers to be decoupled from a particular > architecture will retaining support for timer tick broadcasts. These > mechanisms are wired up for the arm port, and have been boot-tested on a > pandaboard. >
For the series: Reviewed-by: Stephen Boyd <sb...@codeaurora.org> -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/