commit 9a2bc335f100a0f6ee6392b9f97ac4188d84db1d
author Borislav Petkov <bp@suse.de> Tue Oct 20 11:54:44 2015 +0200
committer Ingo Molnar <mingo@kernel.org> Wed Oct 21 11:22:11 2015 +0200
tree 4faed1758e85736f25b6f0ed4e7820a02b028aea
parent 81ffdcdd97d94110627caa81c23d5d780083731d

x86/microcode: Unmodularize the microcode driver

Make CONFIG_MICROCODE a bool. It was practically a bool already anyway,
since early loader was forcing it to =y.

Regardless, there's no real reason to have something be a module which
gets built-in on the majority of installations out there. And its not
like there's noticeable change in functionality - we still can load late
microcode - just the module glue disappears.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/1445334889-300-2-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/kernel/cpu/microcode/amd.c

diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index da922d1..5dcce5d 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -523,7 +523,7 @@
 
 struct microcode_ops * __init init_amd_microcode(void)
 {
-	struct cpuinfo_x86 *c = &cpu_data(0);
+	struct cpuinfo_x86 *c = &boot_cpu_data;
 
 	if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
 		pr_warning("AMD CPU family 0x%x not supported\n", c->x86);

arch/x86/kernel/cpu/microcode/core.c

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 9e3f3c7..15491dd 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -487,9 +487,9 @@
 	.attrs = cpu_root_microcode_attrs,
 };
 
-static int __init microcode_init(void)
+int __init microcode_init(void)
 {
-	struct cpuinfo_x86 *c = &cpu_data(0);
+	struct cpuinfo_x86 *c = &boot_cpu_data;
 	int error;
 
 	if (paravirt_enabled() || dis_ucode_ldr)
@@ -560,35 +560,3 @@
 	return error;
 
 }
-module_init(microcode_init);
-
-static void __exit microcode_exit(void)
-{
-	struct cpuinfo_x86 *c = &cpu_data(0);
-
-	microcode_dev_exit();
-
-	unregister_hotcpu_notifier(&mc_cpu_notifier);
-	unregister_syscore_ops(&mc_syscore_ops);
-
-	sysfs_remove_group(&cpu_subsys.dev_root->kobj,
-			   &cpu_root_microcode_group);
-
-	get_online_cpus();
-	mutex_lock(&microcode_mutex);
-
-	subsys_interface_unregister(&mc_cpu_interface);
-
-	mutex_unlock(&microcode_mutex);
-	put_online_cpus();
-
-	platform_device_unregister(microcode_pdev);
-
-	microcode_ops = NULL;
-
-	if (c->x86_vendor == X86_VENDOR_AMD)
-		exit_amd_microcode();
-
-	pr_info("Microcode Update Driver: v" MICROCODE_VERSION " removed.\n");
-}
-module_exit(microcode_exit);

arch/x86/kernel/cpu/microcode/intel.c

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index 969dc17..bfd6fcd 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -264,7 +264,7 @@
 
 struct microcode_ops * __init init_intel_microcode(void)
 {
-	struct cpuinfo_x86 *c = &cpu_data(0);
+	struct cpuinfo_x86 *c = &boot_cpu_data;
 
 	if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
 	    cpu_has(c, X86_FEATURE_IA64)) {