This is an updated version of the series I posted earlier this month: http://lists.infradead.org/pipermail/linux-arm-kernel/2013-January/140528.html
The core patches can be found at: git://linux-arm.org/linux-mr.git tags/timer-broadcast-v3-core And the full series can be found at: git://linux-arm.org/linux-mr.git tags/timer-broadcast-v3-arm Changes since v2: * Add evt->event_handler check in tick_receive_broadcast * Remove tick_receive_broadcast stub for !GENERIC_CLOCKEVENTS_BROADCAST * #ifdef IPI_TIMER handler for unexpected IPI warning * Reorder patches (generic first, then arm implementation) 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 to Stephen Boyd, Santosh Shilimkar, and Thomas Gleixner 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. Thanks, Mark. Mark Rutland (4): clockevents: Add generic timer broadcast receiver clockevents: Add generic timer broadcast function arm: Use generic timer broadcast receiver arm: Add generic timer broadcast support arch/arm/Kconfig | 1 + arch/arm/kernel/smp.c | 13 ++++--------- include/linux/clockchips.h | 9 +++++++++ kernel/time/Kconfig | 4 ++++ kernel/time/tick-broadcast.c | 28 ++++++++++++++++++++++++++++ 5 files changed, 46 insertions(+), 9 deletions(-) -- 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/
