x86: create smp.c

this patch moves all the functions and data structures that look
like exactly the same from smp_{32,64}.c to smp.c

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 223 deletions

diff --git a/arch/x86/kernel/smp_32.c b/arch/x86/kernel/smp_32.c
index 8be3e091dcd0..61e546e85733 100644
--- a/arch/x86/kernel/smp_32.c
+++ b/arch/x86/kernel/smp_32.c
@@ -466,217 +466,6 @@ 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;
-};
-
-void lock_ipi_call_lock(void)
-{
-        spin_lock_irq(&call_lock);
-}
-
-void unlock_ipi_call_lock(void)
-{
-        spin_unlock_irq(&call_lock);
-}
-
-static struct call_data_struct *call_data;
-
-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();
-}
-
-
-/**
- * smp_call_function_mask(): Run a function on a set of other CPUs.
- * @mask: The set of cpus to run on.  Must not include the current cpu.
- * @func: The function to run. This must be fast and non-blocking.
- * @info: An arbitrary pointer to pass to the function.
- * @wait: If true, wait (atomically) until function has completed on other CPUs.
- *
-  * Returns 0 on success, else a negative status code.
- *
- * If @wait is true, then returns once @func has returned; otherwise
- * it returns just before the target cpu calls @func.
- *
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-static 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 (;;);
-}
-
-/*
- * this function calls the 'stop' function on all other CPUs in the system.
- */
-
-static 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.
- */
-void smp_reschedule_interrupt(struct pt_regs *regs)
-{
-        ack_APIC_irq();
-        __get_cpu_var(irq_stat).irq_resched_count++;
-}
-
-void smp_call_function_interrupt(struct pt_regs *regs)
-{
-        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
-         */
-        irq_enter();
-        (*func)(info);
-        __get_cpu_var(irq_stat).irq_call_count++;
-        irq_exit();
-
-        if (wait) {
-                mb();
-                atomic_inc(&call_data->finished);
-        }
-}
-
 static int convert_apicid_to_cpu(int apic_id)
 {
         int i;
@@ -703,15 +492,3 @@ int safe_smp_processor_id(void)
 
         return cpuid >= 0 ? cpuid : 0;
 }
-
-struct smp_ops smp_ops = {
-        .smp_prepare_boot_cpu = native_smp_prepare_boot_cpu,
-        .smp_prepare_cpus = native_smp_prepare_cpus,
-        .cpu_up = native_cpu_up,
-        .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,
-};
-EXPORT_SYMBOL_GPL(smp_ops);