From: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Date: Tue, 19 Aug 2008 22:16:13 +0000 (+0200)
Subject: x86-microcode: fix unbalanced use of get_cpu()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8343ef2437c599d30568e6b5a257a40bf2f4902b;p=linux-beck.git

x86-microcode: fix unbalanced use of get_cpu()

Don't use get_cpu() at all. Resort to checking a boot-up CPU (#0) in
microcode_{intel,amd}_module_init().

Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index 33b2a217a8c5..a6e76ccf8158 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -500,13 +500,15 @@ static struct microcode_ops microcode_amd_ops = {
 
 static int __init microcode_amd_module_init(void)
 {
-	struct cpuinfo_x86 *c = &cpu_data(get_cpu());
+	struct cpuinfo_x86 *c = &cpu_data(0);
 
 	equiv_cpu_table = NULL;
-	if (c->x86_vendor == X86_VENDOR_AMD)
-		return microcode_init(&microcode_amd_ops, THIS_MODULE);
-	else
+	if (c->x86_vendor != X86_VENDOR_AMD) {
+		printk(KERN_ERR "microcode: CPU platform is not AMD-capable\n");
 		return -ENODEV;
+	}
+
+	return microcode_init(&microcode_amd_ops, THIS_MODULE);
 }
 
 static void __exit microcode_amd_module_exit(void)
diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c
index d2d9d74f4cbb..6dd8907ff22e 100644
--- a/arch/x86/kernel/microcode_intel.c
+++ b/arch/x86/kernel/microcode_intel.c
@@ -531,12 +531,14 @@ static struct microcode_ops microcode_intel_ops = {
 
 static int __init microcode_intel_module_init(void)
 {
-	struct cpuinfo_x86 *c = &cpu_data(get_cpu());
+	struct cpuinfo_x86 *c = &cpu_data(0);
 
-	if (c->x86_vendor == X86_VENDOR_INTEL)
-		return microcode_init(&microcode_intel_ops, THIS_MODULE);
-	else
+	if (c->x86_vendor != X86_VENDOR_INTEL) {
+                printk(KERN_ERR "microcode: CPU platform is not Intel-capable\n");
 		return -ENODEV;
+	}
+
+	return microcode_init(&microcode_intel_ops, THIS_MODULE);
 }
 
 static void __exit microcode_intel_module_exit(void)