1 files changed, 11 insertions, 14 deletions

diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 6a52d4b36a30..8b862d5900fe 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -40,6 +40,7 @@
 #include <linux/cpu.h>
 #include <linux/notifier.h>
 #include <linux/uaccess.h>
+#include <linux/gfp.h>
 
 #include <asm/processor.h>
 #include <asm/msr.h>
@@ -116,21 +117,16 @@ static int cpuid_open(struct inode *inode, struct file *file)
 {
         unsigned int cpu;
         struct cpuinfo_x86 *c;
-        int ret = 0;
-
-        lock_kernel();
 
         cpu = iminor(file->f_path.dentry->d_inode);
-        if (cpu >= nr_cpu_ids || !cpu_online(cpu)) {
-                ret = -ENXIO;   /* No such CPU */
-                goto out;
-        }
+        if (cpu >= nr_cpu_ids || !cpu_online(cpu))
+                return -ENXIO;  /* No such CPU */
+
         c = &cpu_data(cpu);
         if (c->cpuid_level < 0)
-                ret = -EIO;     /* CPUID not supported */
-out:
-        unlock_kernel();
-        return ret;
+                return -EIO;    /* CPUID not supported */
+
+        return 0;
 }
 
 /*
@@ -192,7 +188,8 @@ static int __init cpuid_init(void)
         int i, err = 0;
         i = 0;
 
-        if (register_chrdev(CPUID_MAJOR, "cpu/cpuid", &cpuid_fops)) {
+        if (__register_chrdev(CPUID_MAJOR, 0, NR_CPUS,
+                              "cpu/cpuid", &cpuid_fops)) {
                 printk(KERN_ERR "cpuid: unable to get major %d for cpuid\n",
                        CPUID_MAJOR);
                 err = -EBUSY;
@@ -221,7 +218,7 @@ out_class:
         }
         class_destroy(cpuid_class);
 out_chrdev:
-        unregister_chrdev(CPUID_MAJOR, "cpu/cpuid");
+        __unregister_chrdev(CPUID_MAJOR, 0, NR_CPUS, "cpu/cpuid");
 out:
         return err;
 }
@@ -233,7 +230,7 @@ static void __exit cpuid_exit(void)
         for_each_online_cpu(cpu)
                 cpuid_device_destroy(cpu);
         class_destroy(cpuid_class);
-        unregister_chrdev(CPUID_MAJOR, "cpu/cpuid");
+        __unregister_chrdev(CPUID_MAJOR, 0, NR_CPUS, "cpu/cpuid");
         unregister_hotcpu_notifier(&cpuid_class_cpu_notifier);
 }