Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

[linux-flexiantxendom0-3.2.10.git] / arch / arm / kernel / smp.c

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 2b26dca..2cee7d1 100644 (file)
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -227,20 +227,6 @@ void __ref cpu_die(void)
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-int __cpu_logical_map[NR_CPUS];
-
-void __init smp_setup_processor_id(void)
-{
-       int i;
-       u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0;
-
-       cpu_logical_map(0) = cpu;
-       for (i = 1; i < NR_CPUS; ++i)
-               cpu_logical_map(i) = i == cpu ? 0 : i;
-
-       printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu);
-}
-
 /*
  * Called by both boot and secondaries to move global data into
  * per-processor storage.
@@ -254,6 +240,8 @@ static void __cpuinit smp_store_cpu_info(unsigned int cpuid)
        store_cpu_topology(cpuid);
 }
 
+static void percpu_timer_setup(void);
+
 /*
  * This is the secondary CPU boot entry.  We're using this CPUs
  * idle thread stack, but a set of temporary page tables.
@@ -304,13 +292,6 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
         */
        percpu_timer_setup();
 
-       while (!cpu_active(cpu))
-               cpu_relax();
-
-       /*
-        * cpu_active bit is set, so it's safe to enalbe interrupts
-        * now.
-        */
        local_irq_enable();
        local_fiq_enable();
 
@@ -438,9 +419,7 @@ 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);
-       irq_enter();
        evt->event_handler(evt);
-       irq_exit();
 }
 
 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
@@ -470,7 +449,20 @@ static void __cpuinit broadcast_timer_setup(struct clock_event_device *evt)
        clockevents_register_device(evt);
 }
 
-void __cpuinit percpu_timer_setup(void)
+static struct local_timer_ops *lt_ops;
+
+#ifdef CONFIG_LOCAL_TIMERS
+int local_timer_register(struct local_timer_ops *ops)
+{
+       if (lt_ops)
+               return -EBUSY;
+
+       lt_ops = ops;
+       return 0;
+}
+#endif
+
+static void __cpuinit percpu_timer_setup(void)
 {
        unsigned int cpu = smp_processor_id();
        struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
@@ -478,7 +470,7 @@ void __cpuinit percpu_timer_setup(void)
        evt->cpumask = cpumask_of(cpu);
        evt->broadcast = smp_timer_broadcast;
 
-       if (local_timer_setup(evt))
+       if (!lt_ops || lt_ops->setup(evt))
                broadcast_timer_setup(evt);
 }
 
@@ -493,7 +485,8 @@ static void percpu_timer_stop(void)
        unsigned int cpu = smp_processor_id();
        struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
 
-       local_timer_stop(evt);
+       if (lt_ops)
+               lt_ops->stop(evt);
 }
 #endif
 
@@ -543,7 +536,9 @@ void handle_IPI(int ipinr, struct pt_regs *regs)
 
        switch (ipinr) {
        case IPI_TIMER:
+               irq_enter();
                ipi_timer();
+               irq_exit();
                break;
 
        case IPI_RESCHEDULE:
@@ -551,15 +546,21 @@ void handle_IPI(int ipinr, struct pt_regs *regs)
                break;
 
        case IPI_CALL_FUNC:
+               irq_enter();
                generic_smp_call_function_interrupt();
+               irq_exit();
                break;
 
        case IPI_CALL_FUNC_SINGLE:
+               irq_enter();
                generic_smp_call_function_single_interrupt();
+               irq_exit();
                break;
 
        case IPI_CPU_STOP:
+               irq_enter();
                ipi_cpu_stop(cpu);
+               irq_exit();
                break;
 
        default: