[PATCH 29/64] Driver Core: x86: add nodename for cpuid and msr drivers.

[Greg Kroah-Hartman]

From: Kay Sievers <kay.sievers@xxxxxxxx>

This adds support to the x86 cpuid and msr drivers to report the proper
device name to userspace for their devices.

Signed-off-by: Kay Sievers <kay.sievers@xxxxxxxx>
Signed-off-by: Jan Blunck <jblunck@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 arch/x86/kernel/cpuid.c |    6 ++++++
 arch/x86/kernel/msr.c   |    6 ++++++
 2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 2ac1f0c..b07af88 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -182,6 +182,11 @@ static struct notifier_block __refdata cpuid_class_cpu_notifier =
 	.notifier_call = cpuid_class_cpu_callback,
 };
 
+static char *cpuid_nodename(struct device *dev)
+{
+	return kasprintf(GFP_KERNEL, "cpu/%u/cpuid", MINOR(dev->devt));
+}
+
 static int __init cpuid_init(void)
 {
 	int i, err = 0;
@@ -198,6 +203,7 @@ static int __init cpuid_init(void)
 		err = PTR_ERR(cpuid_class);
 		goto out_chrdev;
 	}
+	cpuid_class->nodename = cpuid_nodename;
 	for_each_online_cpu(i) {
 		err = cpuid_device_create(i);
 		if (err != 0)
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index 3cf3413..98fd6cd 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -196,6 +196,11 @@ static struct notifier_block __refdata msr_class_cpu_notifier = {
 	.notifier_call = msr_class_cpu_callback,
 };
 
+static char *msr_nodename(struct device *dev)
+{
+	return kasprintf(GFP_KERNEL, "cpu/%u/msr", MINOR(dev->devt));
+}
+
 static int __init msr_init(void)
 {
 	int i, err = 0;
@@ -212,6 +217,7 @@ static int __init msr_init(void)
 		err = PTR_ERR(msr_class);
 		goto out_chrdev;
 	}
+	msr_class->nodename = msr_nodename;
 	for_each_online_cpu(i) {
 		err = msr_device_create(i);
 		if (err != 0)
-- 
1.6.3.2

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