ARM: sunxi_defconfig: enable CONFIG_REGULATOR

[cascardo/linux.git] / kernel / smp.c

diff --git a/kernel/smp.c b/kernel/smp.c
index aff8aa1..f38a1e6 100644 (file)
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -13,6 +13,7 @@
 #include <linux/gfp.h>
 #include <linux/smp.h>
 #include <linux/cpu.h>
+#include <linux/sched.h>
 
 #include "smpboot.h"
 
@@ -164,7 +165,7 @@ static int generic_exec_single(int cpu, struct call_single_data *csd,
        if (!csd) {
                csd = &csd_stack;
                if (!wait)
-                       csd = &__get_cpu_var(csd_data);
+                       csd = this_cpu_ptr(&csd_data);
        }
 
        csd_lock(csd);
@@ -229,7 +230,7 @@ static void flush_smp_call_function_queue(bool warn_cpu_offline)
 
        WARN_ON(!irqs_disabled());
 
-       head = &__get_cpu_var(call_single_queue);
+       head = this_cpu_ptr(&call_single_queue);
        entry = llist_del_all(head);
        entry = llist_reverse_order(entry);
 
@@ -419,7 +420,7 @@ void smp_call_function_many(const struct cpumask *mask,
                return;
        }
 
-       cfd = &__get_cpu_var(cfd_data);
+       cfd = this_cpu_ptr(&cfd_data);
 
        cpumask_and(cfd->cpumask, mask, cpu_online_mask);
        cpumask_clear_cpu(this_cpu, cfd->cpumask);
@@ -699,3 +700,24 @@ void kick_all_cpus_sync(void)
        smp_call_function(do_nothing, NULL, 1);
 }
 EXPORT_SYMBOL_GPL(kick_all_cpus_sync);
+
+/**
+ * wake_up_all_idle_cpus - break all cpus out of idle
+ * wake_up_all_idle_cpus try to break all cpus which is in idle state even
+ * including idle polling cpus, for non-idle cpus, we will do nothing
+ * for them.
+ */
+void wake_up_all_idle_cpus(void)
+{
+       int cpu;
+
+       preempt_disable();
+       for_each_online_cpu(cpu) {
+               if (cpu == smp_processor_id())
+                       continue;
+
+               wake_up_if_idle(cpu);
+       }
+       preempt_enable();
+}
+EXPORT_SYMBOL_GPL(wake_up_all_idle_cpus);