x86: use disable_apic in 32bit

change the enable_local_apic to static force_enable_local_apic for 32bit

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 8 insertions, 15 deletions

diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
index 8fbad8ed0ebe..6dea8306d8c0 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic_32.c
@@ -55,9 +55,10 @@ unsigned long mp_lapic_addr;
 /*
  * Knob to control our willingness to enable the local APIC.
  *
- * -1=force-disable, +1=force-enable
+ * +1=force-enable
  */
-int enable_local_apic;
+static int force_enable_local_apic;
+int disable_apic;
 
 /* Local APIC timer verification ok */
 static int local_apic_timer_verify_ok;
@@ -1099,7 +1100,7 @@ static int __init detect_init_APIC(void)
         u32 h, l, features;
 
         /* Disabled by kernel option? */
-        if (enable_local_apic < 0)
+        if (disable_apic)
                 return -1;
 
         switch (boot_cpu_data.x86_vendor) {
@@ -1122,7 +1123,7 @@ static int __init detect_init_APIC(void)
                  * Over-ride BIOS and try to enable the local APIC only if
                  * "lapic" specified.
                  */
-                if (enable_local_apic <= 0) {
+                if (!force_enable_local_apic) {
                         printk(KERN_INFO "Local APIC disabled by BIOS -- "
                                "you can enable it with \"lapic\"\n");
                         return -1;
@@ -1208,7 +1209,7 @@ int apic_version[MAX_APICS];
 
 int __init APIC_init_uniprocessor(void)
 {
-        if (enable_local_apic < 0)
+        if (disable_apic)
                 clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
 
         if (!smp_found_config && !cpu_has_apic)
@@ -1682,14 +1683,14 @@ static void apic_pm_activate(void) { }
  */
 static int __init parse_lapic(char *arg)
 {
-        enable_local_apic = 1;
+        force_enable_local_apic = 1;
         return 0;
 }
 early_param("lapic", parse_lapic);
 
 static int __init parse_nolapic(char *arg)
 {
-        enable_local_apic = -1;
+        disable_apic = 1;
         clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
         return 0;
 }
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 4716460607b4..fb318edd8bc6 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -598,12 +598,8 @@ void __init setup_arch(char **cmdline_p)
 
         if (acpi_mps_check()) {
 #ifdef CONFIG_X86_LOCAL_APIC
-#ifdef CONFIG_X86_32
-                enable_local_apic = -1;
-#else
                 disable_apic = 1;
 #endif
-#endif
                 clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
         }
 
diff --git a/include/asm-x86/apic.h b/include/asm-x86/apic.h
index 6ae6ae68d4cd..a29807737d3d 100644
--- a/include/asm-x86/apic.h
+++ b/include/asm-x86/apic.h
@@ -40,11 +40,7 @@ extern int local_apic_timer_c2_ok;
 
 extern int ioapic_force;
 
-#ifdef CONFIG_X86_64
 extern int disable_apic;
-#else
-extern int enable_local_apic;
-#endif
 /*
  * Basic functions accessing APICs.
  */