sh: provide percpu CPU states for hotplug notifiers.
This provides percpu CPU states in preparation for CPU hotplug and the associated notifier chains. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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@ -10,6 +10,7 @@
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#include <linux/spinlock.h>
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#include <asm/atomic.h>
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#include <asm/current.h>
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#include <asm/percpu.h>
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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@ -30,6 +31,8 @@ enum {
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SMP_MSG_NR, /* must be last */
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};
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DECLARE_PER_CPU(int, cpu_state);
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void smp_message_recv(unsigned int msg);
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void smp_timer_broadcast(const struct cpumask *mask);
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@ -33,6 +33,9 @@ int __cpu_logical_map[NR_CPUS]; /* Map logical to physical */
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struct plat_smp_ops *mp_ops = NULL;
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/* State of each CPU */
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DEFINE_PER_CPU(int, cpu_state) = { 0 };
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void __cpuinit register_smp_ops(struct plat_smp_ops *ops)
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{
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if (mp_ops)
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@ -72,11 +75,13 @@ void __devinit smp_prepare_boot_cpu(void)
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set_cpu_online(cpu, true);
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set_cpu_possible(cpu, true);
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per_cpu(cpu_state, cpu) = CPU_ONLINE;
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}
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asmlinkage void __cpuinit start_secondary(void)
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{
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unsigned int cpu;
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unsigned int cpu = smp_processor_id();
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struct mm_struct *mm = &init_mm;
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enable_mmu();
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@ -90,12 +95,10 @@ asmlinkage void __cpuinit start_secondary(void)
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preempt_disable();
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notify_cpu_starting(smp_processor_id());
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notify_cpu_starting(cpu);
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local_irq_enable();
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cpu = smp_processor_id();
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/* Enable local timers */
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local_timer_setup(cpu);
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calibrate_delay();
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@ -103,6 +106,7 @@ asmlinkage void __cpuinit start_secondary(void)
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smp_store_cpu_info(cpu);
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set_cpu_online(cpu, true);
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per_cpu(cpu_state, cpu) = CPU_ONLINE;
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cpu_idle();
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}
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@ -127,6 +131,8 @@ int __cpuinit __cpu_up(unsigned int cpu)
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return PTR_ERR(tsk);
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}
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per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
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/* Fill in data in head.S for secondary cpus */
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stack_start.sp = tsk->thread.sp;
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stack_start.thread_info = tsk->stack;
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