arm: Use generic timer broadcast receiver

Currently, the ARM backend must maintain a redundant list of timers for
the purpose of centralising timer broadcast functionality. This prevents
sharing timer drivers across architectures.

This patch moves the pain of dealing with timer broadcasts to the core
clockevents tick broadcast code, which already maintains its own list
of timers.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 84f4cbf652e58b3acfea846ad1cad9ddbee72d95..930851912b379283575d9a68c7fc88dd524aa5f0 100644 (file)
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -475,12 +475,6 @@ u64 smp_irq_stat_cpu(unsigned int cpu)
  */
 static DEFINE_PER_CPU(struct clock_event_device, percpu_clockevent);
 
-static void ipi_timer(void)
-{
-       struct clock_event_device *evt = &__get_cpu_var(percpu_clockevent);
-       evt->event_handler(evt);
-}
-
 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
 static void smp_timer_broadcast(const struct cpumask *mask)
 {
@@ -596,11 +590,13 @@ void handle_IPI(int ipinr, struct pt_regs *regs)
        case IPI_WAKEUP:
                break;
 
+#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
        case IPI_TIMER:
                irq_enter();
-               ipi_timer();
+               tick_receive_broadcast();
                irq_exit();
                break;
+#endif
 
        case IPI_RESCHEDULE:
                scheduler_ipi();