menuconfig: dont use obsolete index() function in lxdialog

[sfrench/cifs-2.6.git] / kernel / cpu.c

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 3d4206ada5c9d970c0806348a75424f30f7adbac..36e70845cfc3b40a4cfa98b06365df480caac6f3 100644 (file)
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -254,6 +254,12 @@ int __cpuinit cpu_up(unsigned int cpu)
 }
 
 #ifdef CONFIG_SUSPEND_SMP
+/* Needed to prevent the microcode driver from requesting firmware in its CPU
+ * hotplug notifier during the suspend/resume.
+ */
+int suspend_cpu_hotplug;
+EXPORT_SYMBOL(suspend_cpu_hotplug);
+
 static cpumask_t frozen_cpus;
 
 int disable_nonboot_cpus(void)
@@ -261,16 +267,8 @@ int disable_nonboot_cpus(void)
        int cpu, first_cpu, error = 0;
 
        mutex_lock(&cpu_add_remove_lock);
-       first_cpu = first_cpu(cpu_present_map);
-       if (!cpu_online(first_cpu)) {
-               error = _cpu_up(first_cpu);
-               if (error) {
-                       printk(KERN_ERR "Could not bring CPU%d up.\n",
-                               first_cpu);
-                       goto out;
-               }
-       }
-
+       suspend_cpu_hotplug = 1;
+       first_cpu = first_cpu(cpu_online_map);
        /* We take down all of the non-boot CPUs in one shot to avoid races
         * with the userspace trying to use the CPU hotplug at the same time
         */
@@ -296,7 +294,7 @@ int disable_nonboot_cpus(void)
        } else {
                printk(KERN_ERR "Non-boot CPUs are not disabled\n");
        }
-out:
+       suspend_cpu_hotplug = 0;
        mutex_unlock(&cpu_add_remove_lock);
        return error;
 }
@@ -308,20 +306,22 @@ void enable_nonboot_cpus(void)
        /* Allow everyone to use the CPU hotplug again */
        mutex_lock(&cpu_add_remove_lock);
        cpu_hotplug_disabled = 0;
-       mutex_unlock(&cpu_add_remove_lock);
        if (cpus_empty(frozen_cpus))
-               return;
+               goto out;
 
+       suspend_cpu_hotplug = 1;
        printk("Enabling non-boot CPUs ...\n");
        for_each_cpu_mask(cpu, frozen_cpus) {
-               error = cpu_up(cpu);
+               error = _cpu_up(cpu);
                if (!error) {
                        printk("CPU%d is up\n", cpu);
                        continue;
                }
-               printk(KERN_WARNING "Error taking CPU%d up: %d\n",
-                       cpu, error);
+               printk(KERN_WARNING "Error taking CPU%d up: %d\n", cpu, error);
        }
        cpus_clear(frozen_cpus);
+       suspend_cpu_hotplug = 0;
+out:
+       mutex_unlock(&cpu_add_remove_lock);
 }
 #endif