x86: untable __init references between IO data

Earlier patch added IO APIC setup into local APIC setup. This caused
modpost warnings. Fix them by untangling setup_local_APIC() and splitting
it into smaller functions. The IO APIC initialization is only called
for the BP init.

Also removed some outdated debugging code and minor cleanup.

[ tglx: arch/x86 adaptation ]
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/apic_64.c

@@ -677,7 +677,7 @@ void __init init_bsp_APIC(void)
  */
 void __cpuinit setup_local_APIC(void)
 {
-	unsigned int value, maxlvt;
+	unsigned int value;
 	int i, j;
 
 	value = apic_read(APIC_LVR);
@@ -773,32 +773,23 @@ void __cpuinit setup_local_APIC(void)
 	else
 		value = APIC_DM_NMI | APIC_LVT_MASKED;
 	apic_write(APIC_LVT1, value);
+}
 
-	/*
-	 * Now enable IO-APICs, actually call clear_IO_APIC
-	 * We need clear_IO_APIC before enabling vector on BP
-	 */
-	if (!smp_processor_id() && !skip_ioapic_setup && nr_ioapics)
-		enable_IO_APIC();
+void __cpuinit lapic_setup_esr(void)
+{
+	unsigned maxlvt = lapic_get_maxlvt();
 
-	{
-		unsigned oldvalue;
-		maxlvt = lapic_get_maxlvt();
-		oldvalue = apic_read(APIC_ESR);
-		value = ERROR_APIC_VECTOR;      // enables sending errors
-		apic_write(APIC_LVTERR, value);
+	apic_write(APIC_LVTERR, ERROR_APIC_VECTOR);
 	/*
 	 * spec says clear errors after enabling vector.
 	 */
 	if (maxlvt > 3)
 		apic_write(APIC_ESR, 0);
-		value = apic_read(APIC_ESR);
-		if (value != oldvalue)
-			apic_printk(APIC_VERBOSE,
-			"ESR value after enabling vector: %08x, after %08x\n",
-			oldvalue, value);
-	}
+}
 
+void __cpuinit end_local_APIC_setup(void)
+{
+	lapic_setup_esr();
 	nmi_watchdog_default();
 	setup_apic_nmi_watchdog(NULL);
 	apic_pm_activate();
@@ -879,6 +870,15 @@ int __init APIC_init_uniprocessor(void)
 
 	setup_local_APIC();
 
+	/*
+	 * Now enable IO-APICs, actually call clear_IO_APIC
+	 * We need clear_IO_APIC before enabling vector on BP
+	 */
+	if (!skip_ioapic_setup && nr_ioapics)
+		enable_IO_APIC();
+
+	end_local_APIC_setup();
+
 	if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
 		setup_IO_APIC();
 	else

arch/x86/kernel/smpboot_64.c

@@ -210,6 +210,7 @@ void __cpuinit smp_callin(void)
 
 	Dprintk("CALLIN, before setup_local_APIC().\n");
 	setup_local_APIC();
+	end_local_APIC_setup();
 
 	/*
 	 * Get our bogomips.
@@ -884,6 +885,13 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 	 */
 	setup_local_APIC();
 
+	/*
+	 * Enable IO APIC before setting up error vector
+	 */
+	if (!skip_ioapic_setup && nr_ioapics)
+		enable_IO_APIC();
+	end_local_APIC_setup();
+
 	if (GET_APIC_ID(apic_read(APIC_ID)) != boot_cpu_id) {
 		panic("Boot APIC ID in local APIC unexpected (%d vs %d)",
 		      GET_APIC_ID(apic_read(APIC_ID)), boot_cpu_id);

include/asm-x86/apic.h

@@ -112,6 +112,7 @@ extern void cache_APIC_registers(void);
 extern void sync_Arb_IDs(void);
 extern void init_bsp_APIC(void);
 extern void setup_local_APIC(void);
+extern void end_local_APIC_setup(void);
 extern void init_apic_mappings(void);
 extern void setup_boot_APIC_clock(void);
 extern void setup_secondary_APIC_clock(void);