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From: tip-bot for Robert Richter on 12 Aug 2010 17:10
Commit-ID: f6e9456c9272bb570df6e217cdbe007e270b1c4e
Gitweb: http://git.kernel.org/tip/f6e9456c9272bb570df6e217cdbe007e270b1c4e
Author: Robert Richter <robert.richter(a)amd.com>
AuthorDate: Wed, 21 Jul 2010 19:03:58 +0200
Committer: H. Peter Anvin <hpa(a)linux.intel.com>
CommitDate: Thu, 12 Aug 2010 14:01:38 -0700

x86, cleanup: Remove obsolete boot_cpu_id variable

boot_cpu_id is there for historical reasons and was renamed to
boot_cpu_physical_apicid in patch:

c70dcb7 x86: change boot_cpu_id to boot_cpu_physical_apicid

However, there are some remaining occurrences of boot_cpu_id that are
never touched in the kernel and thus its value is always 0.

This patch removes boot_cpu_id completely.

Signed-off-by: Robert Richter <robert.richter(a)amd.com>
LKML-Reference: <1279731838-1522-8-git-send-email-robert.richter(a)amd.com>
Signed-off-by: H. Peter Anvin <hpa(a)linux.intel.com>
---
arch/x86/include/asm/apb_timer.h | 1 -
arch/x86/include/asm/cpu.h | 1 -
arch/x86/kernel/apb_timer.c | 2 +-
arch/x86/kernel/apic/io_apic.c | 12 ++++++------
arch/x86/kernel/cpu/amd.c | 2 +-
arch/x86/kernel/cpu/common.c | 2 +-
arch/x86/kernel/cpu/intel.c | 2 +-
arch/x86/kernel/reboot.c | 2 +-
arch/x86/kernel/setup.c | 1 -
arch/x86/kernel/setup_percpu.c | 2 +-
arch/x86/mm/k8topology_64.c | 6 +++---
11 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/arch/x86/include/asm/apb_timer.h b/arch/x86/include/asm/apb_timer.h
index a69b1ac..2fefa50 100644
--- a/arch/x86/include/asm/apb_timer.h
+++ b/arch/x86/include/asm/apb_timer.h
@@ -54,7 +54,6 @@ extern struct clock_event_device *global_clock_event;
extern unsigned long apbt_quick_calibrate(void);
extern int arch_setup_apbt_irqs(int irq, int trigger, int mask, int cpu);
extern void apbt_setup_secondary_clock(void);
-extern unsigned int boot_cpu_id;

extern struct sfi_timer_table_entry *sfi_get_mtmr(int hint);
extern void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr);
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index b185091..4fab24d 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -32,6 +32,5 @@ extern void arch_unregister_cpu(int);

DECLARE_PER_CPU(int, cpu_state);

-extern unsigned int boot_cpu_id;

#endif /* _ASM_X86_CPU_H */
diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c
index 8dd7780..08f75fb 100644
--- a/arch/x86/kernel/apb_timer.c
+++ b/arch/x86/kernel/apb_timer.c
@@ -343,7 +343,7 @@ void apbt_setup_secondary_clock(void)

/* Don't register boot CPU clockevent */
cpu = smp_processor_id();
- if (cpu == boot_cpu_id)
+ if (!cpu)
return;
/*
* We need to calculate the scaled math multiplication factor for
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 4dc0084..8884928 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -162,7 +162,7 @@ int __init arch_early_irq_init(void)

cfg = irq_cfgx;
count = ARRAY_SIZE(irq_cfgx);
- node= cpu_to_node(boot_cpu_id);
+ node = cpu_to_node(0);

for (i = 0; i < count; i++) {
desc = irq_to_desc(i);
@@ -1483,7 +1483,7 @@ static void __init setup_IO_APIC_irqs(void)
int notcon = 0;
struct irq_desc *desc;
struct irq_cfg *cfg;
- int node = cpu_to_node(boot_cpu_id);
+ int node = cpu_to_node(0);

apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");

@@ -1548,7 +1548,7 @@ static void __init setup_IO_APIC_irqs(void)
void setup_IO_APIC_irq_extra(u32 gsi)
{
int apic_id = 0, pin, idx, irq;
- int node = cpu_to_node(boot_cpu_id);
+ int node = cpu_to_node(0);
struct irq_desc *desc;
struct irq_cfg *cfg;

@@ -2925,7 +2925,7 @@ static inline void __init check_timer(void)
{
struct irq_desc *desc = irq_to_desc(0);
struct irq_cfg *cfg = desc->chip_data;
- int node = cpu_to_node(boot_cpu_id);
+ int node = cpu_to_node(0);
int apic1, pin1, apic2, pin2;
unsigned long flags;
int no_pin1 = 0;
@@ -3279,7 +3279,7 @@ unsigned int create_irq_nr(unsigned int irq_want, int node)

int create_irq(void)
{
- int node = cpu_to_node(boot_cpu_id);
+ int node = cpu_to_node(0);
unsigned int irq_want;
int irq;

@@ -3901,7 +3901,7 @@ static int __io_apic_set_pci_routing(struct device *dev, int irq,
if (dev)
node = dev_to_node(dev);
else
- node = cpu_to_node(boot_cpu_id);
+ node = cpu_to_node(0);

desc = irq_to_desc_alloc_node(irq, node);
if (!desc) {
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 60a57b1..3a7c852 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -148,7 +148,7 @@ static void __cpuinit amd_k7_smp_check(struct cpuinfo_x86 *c)
{
#ifdef CONFIG_SMP
/* calling is from identify_secondary_cpu() ? */
- if (c->cpu_index == boot_cpu_id)
+ if (!c->cpu_index)
return;

/*
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 490dac6..787b3c7 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -665,7 +665,7 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
this_cpu->c_early_init(c);

#ifdef CONFIG_SMP
- c->cpu_index = boot_cpu_id;
+ c->cpu_index = 0;
#endif
filter_cpuid_features(c, false);
}
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 85f69cd..3a683ea 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -169,7 +169,7 @@ static void __cpuinit intel_smp_check(struct cpuinfo_x86 *c)
{
#ifdef CONFIG_SMP
/* calling is from identify_secondary_cpu() ? */
- if (c->cpu_index == boot_cpu_id)
+ if (!c->cpu_index)
return;

/*
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index e3af342..7a4cf14 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -84,7 +84,7 @@ static int __init reboot_setup(char *str)
}
/* we will leave sorting out the final value
when we are ready to reboot, since we might not
- have set up boot_cpu_id or smp_num_cpu */
+ have detected BSP APIC ID or smp_num_cpu */
break;
#endif /* CONFIG_SMP */

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index b008e78..dede5c4 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -125,7 +125,6 @@ unsigned long max_pfn_mapped;
RESERVE_BRK(dmi_alloc, 65536);
#endif

-unsigned int boot_cpu_id __read_mostly;

static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
unsigned long _brk_end = (unsigned long)__brk_base;
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index a60df9a..2335c15 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -253,7 +253,7 @@ void __init setup_per_cpu_areas(void)
* Up to this point, the boot CPU has been using .init.data
* area. Reload any changed state for the boot CPU.
*/
- if (cpu == boot_cpu_id)
+ if (!cpu)
switch_to_new_gdt(cpu);
}

diff --git a/arch/x86/mm/k8topology_64.c b/arch/x86/mm/k8topology_64.c
index 970ed57..240f864 100644
--- a/arch/x86/mm/k8topology_64.c
+++ b/arch/x86/mm/k8topology_64.c
@@ -54,8 +54,8 @@ static __init int find_northbridge(void)
static __init void early_get_boot_cpu_id(void)
{
/*
- * need to get boot_cpu_id so can use that to create apicid_to_node
- * in k8_scan_nodes()
+ * need to get the APIC ID of the BSP so can use that to
+ * create apicid_to_node in k8_scan_nodes()
*/
#ifdef CONFIG_X86_MPPARSE
/*
@@ -212,7 +212,7 @@ int __init k8_scan_nodes(void)
bits = boot_cpu_data.x86_coreid_bits;
cores = (1<<bits);
apicid_base = 0;
- /* need to get boot_cpu_id early for system with apicid lifting */
+ /* get the APIC ID of the BSP early for systems with apicid lifting */
early_get_boot_cpu_id();
if (boot_cpu_physical_apicid > 0) {
pr_info("BSP APIC ID: %02x\n", boot_cpu_physical_apicid);
--
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