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Diffstat (limited to 'arch/x86/kernel/cpuid.c')
-rw-r--r--arch/x86/kernel/cpuid.c22
1 files changed, 9 insertions, 13 deletions
diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 6a52d4b36a3..cb27fd6136c 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -116,21 +116,16 @@ 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 +187,8 @@ 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 +217,7 @@ 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;
}