x86: create smp.c
[sfrench/cifs-2.6.git] / arch / x86 / kernel / smp_64.c
index ad11ef0c3fae6fb4d641ddf7fbb22f0896d1bad8..d28e8685709de4306fea71e0eeb220d0e2b3d34f 100644 (file)
@@ -283,208 +283,3 @@ void flush_tlb_all(void)
 {
        on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
 }
-
-/*
- * this function sends a 'reschedule' IPI to another CPU.
- * it goes straight through and wastes no time serializing
- * anything. Worst case is that we lose a reschedule ...
- */
-
-static void native_smp_send_reschedule(int cpu)
-{
-       WARN_ON(cpu_is_offline(cpu));
-       send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
-}
-
-/*
- * Structure and data for smp_call_function(). This is designed to minimise
- * static memory requirements. It also looks cleaner.
- */
-static DEFINE_SPINLOCK(call_lock);
-
-struct call_data_struct {
-       void (*func) (void *info);
-       void *info;
-       atomic_t started;
-       atomic_t finished;
-       int wait;
-};
-
-static struct call_data_struct * call_data;
-
-void lock_ipi_call_lock(void)
-{
-       spin_lock_irq(&call_lock);
-}
-
-void unlock_ipi_call_lock(void)
-{
-       spin_unlock_irq(&call_lock);
-}
-
-static void __smp_call_function(void (*func) (void *info), void *info,
-                               int nonatomic, int wait)
-{
-       struct call_data_struct data;
-       int cpus = num_online_cpus() - 1;
-
-       if (!cpus)
-               return;
-
-       data.func = func;
-       data.info = info;
-       atomic_set(&data.started, 0);
-       data.wait = wait;
-       if (wait)
-               atomic_set(&data.finished, 0);
-
-       call_data = &data;
-       mb();
-
-       /* Send a message to all other CPUs and wait for them to respond */
-       send_IPI_allbutself(CALL_FUNCTION_VECTOR);
-
-       /* Wait for response */
-       while (atomic_read(&data.started) != cpus)
-               cpu_relax();
-
-       if (wait)
-               while (atomic_read(&data.finished) != cpus)
-                       cpu_relax();
-}
-
-
-int native_smp_call_function_mask(cpumask_t mask,
-                                 void (*func)(void *), void *info,
-                                 int wait)
-{
-       struct call_data_struct data;
-       cpumask_t allbutself;
-       int cpus;
-
-       /* Can deadlock when called with interrupts disabled */
-       WARN_ON(irqs_disabled());
-
-       /* Holding any lock stops cpus from going down. */
-       spin_lock(&call_lock);
-
-       allbutself = cpu_online_map;
-       cpu_clear(smp_processor_id(), allbutself);
-
-       cpus_and(mask, mask, allbutself);
-       cpus = cpus_weight(mask);
-
-       if (!cpus) {
-               spin_unlock(&call_lock);
-               return 0;
-       }
-
-       data.func = func;
-       data.info = info;
-       atomic_set(&data.started, 0);
-       data.wait = wait;
-       if (wait)
-               atomic_set(&data.finished, 0);
-
-       call_data = &data;
-       wmb();
-
-       /* Send a message to other CPUs */
-       if (cpus_equal(mask, allbutself))
-               send_IPI_allbutself(CALL_FUNCTION_VECTOR);
-       else
-               send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
-
-       /* Wait for response */
-       while (atomic_read(&data.started) != cpus)
-               cpu_relax();
-
-       if (wait)
-                while (atomic_read(&data.finished) != cpus)
-                       cpu_relax();
-
-       spin_unlock(&call_lock);
-
-       return 0;
-}
-
-static void stop_this_cpu(void *dummy)
-{
-       local_irq_disable();
-       /*
-        * Remove this CPU:
-        */
-       cpu_clear(smp_processor_id(), cpu_online_map);
-       disable_local_APIC();
-       if (hlt_works(smp_processor_id()))
-               for (;;) halt();
-       for (;;);
-}
-
-void native_smp_send_stop(void)
-{
-       int nolock;
-       unsigned long flags;
-
-       if (reboot_force)
-               return;
-
-       /* Don't deadlock on the call lock in panic */
-       nolock = !spin_trylock(&call_lock);
-       local_irq_save(flags);
-       __smp_call_function(stop_this_cpu, NULL, 0, 0);
-       if (!nolock)
-               spin_unlock(&call_lock);
-       disable_local_APIC();
-       local_irq_restore(flags);
-}
-
-/*
- * Reschedule call back. Nothing to do,
- * all the work is done automatically when
- * we return from the interrupt.
- */
-asmlinkage void smp_reschedule_interrupt(void)
-{
-       ack_APIC_irq();
-       add_pda(irq_resched_count, 1);
-}
-
-asmlinkage void smp_call_function_interrupt(void)
-{
-       void (*func) (void *info) = call_data->func;
-       void *info = call_data->info;
-       int wait = call_data->wait;
-
-       ack_APIC_irq();
-       /*
-        * Notify initiating CPU that I've grabbed the data and am
-        * about to execute the function
-        */
-       mb();
-       atomic_inc(&call_data->started);
-       /*
-        * At this point the info structure may be out of scope unless wait==1
-        */
-       exit_idle();
-       irq_enter();
-       (*func)(info);
-       add_pda(irq_call_count, 1);
-       irq_exit();
-       if (wait) {
-               mb();
-               atomic_inc(&call_data->finished);
-       }
-}
-
-struct smp_ops smp_ops = {
-       .smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
-       .smp_prepare_cpus = native_smp_prepare_cpus,
-       .smp_cpus_done = native_smp_cpus_done,
-
-       .smp_send_stop = native_smp_send_stop,
-       .smp_send_reschedule = native_smp_send_reschedule,
-       .smp_call_function_mask = native_smp_call_function_mask,
-       .cpu_up = native_cpu_up,
-};
-EXPORT_SYMBOL_GPL(smp_ops);