[PATCH] i2c: Handle i2c_add_adapter failure in i2c algorithm drivers

[pandora-kernel.git] / kernel / cpu.c

diff --git a/kernel/cpu.c b/kernel/cpu.c
index fe2b8d0..70fbf2e 100644 (file)
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -13,12 +13,12 @@
 #include <linux/module.h>
 #include <linux/kthread.h>
 #include <linux/stop_machine.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 
 /* This protects CPUs going up and down... */
-static DECLARE_MUTEX(cpucontrol);
+static DEFINE_MUTEX(cpucontrol);
 
-static BLOCKING_NOTIFIER_HEAD(cpu_chain);
+static __cpuinitdata BLOCKING_NOTIFIER_HEAD(cpu_chain);
 
 #ifdef CONFIG_HOTPLUG_CPU
 static struct task_struct *lock_cpu_hotplug_owner;
@@ -30,9 +30,9 @@ static int __lock_cpu_hotplug(int interruptible)
 
        if (lock_cpu_hotplug_owner != current) {
                if (interruptible)
-                       ret = down_interruptible(&cpucontrol);
+                       ret = mutex_lock_interruptible(&cpucontrol);
                else
-                       down(&cpucontrol);
+                       mutex_lock(&cpucontrol);
        }
 
        /*
@@ -56,7 +56,7 @@ void unlock_cpu_hotplug(void)
 {
        if (--lock_cpu_hotplug_depth == 0) {
                lock_cpu_hotplug_owner = NULL;
-               up(&cpucontrol);
+               mutex_unlock(&cpucontrol);
        }
 }
 EXPORT_SYMBOL_GPL(unlock_cpu_hotplug);
@@ -69,10 +69,13 @@ EXPORT_SYMBOL_GPL(lock_cpu_hotplug_interruptible);
 #endif /* CONFIG_HOTPLUG_CPU */
 
 /* Need to know about CPUs going up/down? */
-int register_cpu_notifier(struct notifier_block *nb)
+int __cpuinit register_cpu_notifier(struct notifier_block *nb)
 {
        return blocking_notifier_chain_register(&cpu_chain, nb);
 }
+
+#ifdef CONFIG_HOTPLUG_CPU
+
 EXPORT_SYMBOL(register_cpu_notifier);
 
 void unregister_cpu_notifier(struct notifier_block *nb)
@@ -81,7 +84,6 @@ void unregister_cpu_notifier(struct notifier_block *nb)
 }
 EXPORT_SYMBOL(unregister_cpu_notifier);
 
-#ifdef CONFIG_HOTPLUG_CPU
 static inline void check_for_tasks(int cpu)
 {
        struct task_struct *p;