x86/apic: Move x2apic code to one place

Having several disjunct pieces of code for x2apic support makes
reading the code unnecessarily hard. Move it to one ifdeffed section.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Borislav Petkov <bp@alien8.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/20150115211702.445212133@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 28 insertions, 30 deletions

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index a7d3b64ff3e5..ff2a8b8ffa0a 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -134,9 +134,6 @@ static inline void imcr_apic_to_pic(void)
  */
 static int force_enable_local_apic __initdata;
 
-/* Control whether x2APIC mode is enabled or not */
-static bool nox2apic __initdata;
-
 /*
  * APIC command line parameters
  */
@@ -161,33 +158,6 @@ static __init int setup_apicpmtimer(char *s)
 __setup("apicpmtimer", setup_apicpmtimer);
 #endif
 
-#ifdef CONFIG_X86_X2APIC
-int x2apic_mode;
-/* x2apic enabled before OS handover */
-int x2apic_preenabled;
-static int x2apic_disabled;
-static int __init setup_nox2apic(char *str)
-{
-        if (x2apic_enabled()) {
-                int apicid = native_apic_msr_read(APIC_ID);
-
-                if (apicid >= 255) {
-                        pr_warning("Apicid: %08x, cannot enforce nox2apic\n",
-                                   apicid);
-                        return 0;
-                }
-
-                pr_warning("x2apic already enabled. will disable it\n");
-        } else
-                setup_clear_cpu_cap(X86_FEATURE_X2APIC);
-
-        nox2apic = true;
-
-        return 0;
-}
-early_param("nox2apic", setup_nox2apic);
-#endif
-
 unsigned long mp_lapic_addr;
 int disable_apic;
 /* Disable local APIC timer from the kernel commandline or via dmi quirk */
@@ -1504,7 +1474,35 @@ void __init bsp_end_local_APIC_setup(void)
 
 }
 
+/* Control whether x2APIC mode is enabled or not */
+static bool nox2apic __initdata;
+
 #ifdef CONFIG_X86_X2APIC
+int x2apic_mode;
+/* x2apic enabled before OS handover */
+int x2apic_preenabled;
+static int x2apic_disabled;
+static int __init setup_nox2apic(char *str)
+{
+        if (x2apic_enabled()) {
+                int apicid = native_apic_msr_read(APIC_ID);
+
+                if (apicid >= 255) {
+                        pr_warning("Apicid: %08x, cannot enforce nox2apic\n",
+                                   apicid);
+                        return 0;
+                }
+
+                pr_warning("x2apic already enabled. will disable it\n");
+        } else
+                setup_clear_cpu_cap(X86_FEATURE_X2APIC);
+
+        nox2apic = true;
+
+        return 0;
+}
+early_param("nox2apic", setup_nox2apic);
+
 /*
  * Need to disable xapic and x2apic at the same time and then enable xapic mode
  */