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Date: Sat, 22 Sep 2007 00:32:10 +0200 (CEST)
From: Andi Kleen <ak@...e.de>
To: patches@...-64.org, linux-kernel@...r.kernel.org
Subject: [PATCH] [12/50] x86_64: 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Also removed some outdated debugging code and minor cleanup.
Signed-off-by: Andi Kleen <ak@...e.de>
---
arch/x86_64/kernel/apic.c | 46 ++++++++++++++++++++-----------------------
arch/x86_64/kernel/smpboot.c | 8 +++++++
include/asm-x86_64/apic.h | 1
3 files changed, 31 insertions(+), 24 deletions(-)
Index: linux/arch/x86_64/kernel/apic.c
===================================================================
--- linux.orig/arch/x86_64/kernel/apic.c
+++ linux/arch/x86_64/kernel/apic.c
@@ -323,7 +323,7 @@ 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);
@@ -417,33 +417,22 @@ void __cpuinit setup_local_APIC (void)
else
value = APIC_DM_NMI | APIC_LVT_MASKED;
apic_write(APIC_LVT1, value);
+}
+void __cpuinit lapic_setup_esr(void)
+{
+ unsigned maxlvt = get_maxlvt();
+ apic_write(APIC_LVTERR, ERROR_APIC_VECTOR);
/*
- * Now enable IO-APICs, actually call clear_IO_APIC
- * We need clear_IO_APIC before enabling vector on BP
+ * spec says clear errors after enabling vector.
*/
- if (!smp_processor_id())
- if (!skip_ioapic_setup && nr_ioapics)
- enable_IO_APIC();
-
- {
- unsigned oldvalue;
- maxlvt = get_maxlvt();
- oldvalue = apic_read(APIC_ESR);
- value = ERROR_APIC_VECTOR; // enables sending errors
- apic_write(APIC_LVTERR, value);
- /*
- * 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);
- }
+ if (maxlvt > 3)
+ apic_write(APIC_ESR, 0);
+}
+void __cpuinit end_local_APIC_setup(void)
+{
+ lapic_setup_esr();
nmi_watchdog_default();
setup_apic_nmi_watchdog(NULL);
apic_pm_activate();
@@ -1178,6 +1167,15 @@ 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
Index: linux/arch/x86_64/kernel/smpboot.c
===================================================================
--- linux.orig/arch/x86_64/kernel/smpboot.c
+++ linux/arch/x86_64/kernel/smpboot.c
@@ -211,6 +211,7 @@ void __cpuinit smp_callin(void)
Dprintk("CALLIN, before setup_local_APIC().\n");
setup_local_APIC();
+ end_local_APIC_setup();
/*
* Get our bogomips.
@@ -870,6 +871,13 @@ void __init smp_prepare_cpus(unsigned in
*/
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);
Index: linux/include/asm-x86_64/apic.h
===================================================================
--- linux.orig/include/asm-x86_64/apic.h
+++ linux/include/asm-x86_64/apic.h
@@ -73,6 +73,7 @@ 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 smp_local_timer_interrupt (void);
extern void setup_boot_APIC_clock (void);
-
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