[PATCH 1/6] ACPI / processor: Introduce apic_id in struct processor to save parsed APIC id
From: Jiang Liu jiang.liu@huawei.com
For cpu hot add, we evaluate _MAT or parse MADT twice to get APIC id, here is the code logic: acpi_processor_add() acpi_processor_get_info() acpi_get_cpuid() will evaluate _MAT or parse MADT; acpi_processor_hotadd_init() acpi_map_lsapic() will evaluate _MAT again;
This can be done more effectively, this patch introduces apic_id in struct processor to save parsed APIC id, and then we can use it and remove the duplicated _MAT evaluation.
Signed-off-by: Jiang Liu jiang.liu@huawei.com Signed-off-by: Hanjun Guo hanjun.guo@linaro.org --- drivers/acpi/acpi_processor.c | 3 ++- drivers/acpi/processor_core.c | 26 +++++++++++++++++++++----- include/acpi/processor.h | 3 +++ 3 files changed, 26 insertions(+), 6 deletions(-)
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index f29e06e..d5a6c81 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -270,7 +270,8 @@ static int acpi_processor_get_info(struct acpi_device *device) device_declaration = 1; pr->acpi_id = value; } - cpu_index = acpi_get_cpuid(pr->handle, device_declaration, pr->acpi_id); + pr->apic_id = acpi_get_apicid(pr->handle, device_declaration, pr->acpi_id); + cpu_index = acpi_map_cpuid(pr->apic_id, pr->acpi_id);
/* Handle UP system running SMP kernel, with no LAPIC in MADT */ if (!cpu0_initialized && (cpu_index == -1) && diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c index cf34d90..b3171f3 100644 --- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -162,16 +162,23 @@ exit: return apic_id; }
-int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) +int acpi_get_apicid(acpi_handle handle, int type, u32 acpi_id) { -#ifdef CONFIG_SMP - int i; -#endif - int apic_id = -1; + int apic_id;
apic_id = map_mat_entry(handle, type, acpi_id); if (apic_id == -1) apic_id = map_madt_entry(type, acpi_id); + + return apic_id; +} + +int acpi_map_cpuid(int apic_id, u32 acpi_id) +{ +#ifdef CONFIG_SMP + int i; +#endif + if (apic_id == -1) { /* * On UP processor, there is no _MAT or MADT table. @@ -211,6 +218,15 @@ int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) #endif return -1; } + +int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) +{ + int apic_id; + + apic_id = acpi_get_apicid(handle, type, acpi_id); + + return acpi_map_cpuid(apic_id, acpi_id); +} EXPORT_SYMBOL_GPL(acpi_get_cpuid);
static bool __init processor_physically_present(acpi_handle handle) diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 66096d0..7816e45 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -199,6 +199,7 @@ struct acpi_processor_flags { struct acpi_processor { acpi_handle handle; u32 acpi_id; + u32 apic_id; u32 id; u32 pblk; int performance_platform_limit; @@ -314,6 +315,8 @@ static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
/* in processor_core.c */ void acpi_processor_set_pdc(acpi_handle handle); +int acpi_get_apicid(acpi_handle, int type, u32 acpi_id); +int acpi_map_cpuid(int apic_id, u32 acpi_id); int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
/* in processor_throttling.c */
From: Jiang Liu jiang.liu@huawei.com
Since APIC id is saved in processor struct, just use it and remove the duplicated _MAT evaluation.
Signed-off-by: Jiang Liu jiang.liu@huawei.com Signed-off-by: Hanjun Guo hanjun.guo@linaro.org --- arch/ia64/kernel/acpi.c | 38 ++++---------------------------------- arch/x86/kernel/acpi/boot.c | 38 +++----------------------------------- drivers/acpi/acpi_processor.c | 2 +- include/linux/acpi.h | 2 +- 4 files changed, 9 insertions(+), 71 deletions(-)
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c index 5eb71d2..59d52e3 100644 --- a/arch/ia64/kernel/acpi.c +++ b/arch/ia64/kernel/acpi.c @@ -882,40 +882,10 @@ __init void prefill_possible_map(void) set_cpu_possible(i, true); }
-static int _acpi_map_lsapic(acpi_handle handle, int *pcpu) +static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) { - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - struct acpi_madt_local_sapic *lsapic; cpumask_t tmp_map; - int cpu, physid; - - if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) - return -EINVAL; - - if (!buffer.length || !buffer.pointer) - return -EINVAL; - - obj = buffer.pointer; - if (obj->type != ACPI_TYPE_BUFFER) - { - kfree(buffer.pointer); - return -EINVAL; - } - - lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer; - - if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) || - (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) { - kfree(buffer.pointer); - return -EINVAL; - } - - physid = ((lsapic->id << 8) | (lsapic->eid)); - - kfree(buffer.pointer); - buffer.length = ACPI_ALLOCATE_BUFFER; - buffer.pointer = NULL; + int cpu;
cpumask_complement(&tmp_map, cpu_present_mask); cpu = cpumask_first(&tmp_map); @@ -934,9 +904,9 @@ static int _acpi_map_lsapic(acpi_handle handle, int *pcpu) }
/* wrapper to silence section mismatch warning */ -int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) +int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) { - return _acpi_map_lsapic(handle, pcpu); + return _acpi_map_lsapic(handle, physid, pcpu); } EXPORT_SYMBOL(acpi_map_lsapic);
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 2627a81..3e186d1 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -620,44 +620,12 @@ static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) #endif }
-static int _acpi_map_lsapic(acpi_handle handle, int *pcpu) +static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) { - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *obj; - struct acpi_madt_local_apic *lapic; cpumask_var_t tmp_map, new_map; - u8 physid; int cpu; int retval = -ENOMEM;
- if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) - return -EINVAL; - - if (!buffer.length || !buffer.pointer) - return -EINVAL; - - obj = buffer.pointer; - if (obj->type != ACPI_TYPE_BUFFER || - obj->buffer.length < sizeof(*lapic)) { - kfree(buffer.pointer); - return -EINVAL; - } - - lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; - - if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || - !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { - kfree(buffer.pointer); - return -EINVAL; - } - - physid = lapic->id; - - kfree(buffer.pointer); - buffer.length = ACPI_ALLOCATE_BUFFER; - buffer.pointer = NULL; - lapic = NULL; - if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) goto out;
@@ -695,9 +663,9 @@ out: }
/* wrapper to silence section mismatch warning */ -int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) +int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) { - return _acpi_map_lsapic(handle, pcpu); + return _acpi_map_lsapic(handle, physid, pcpu); } EXPORT_SYMBOL(acpi_map_lsapic);
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index d5a6c81..488e5d8 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -181,7 +181,7 @@ static int acpi_processor_hotadd_init(struct acpi_processor *pr) cpu_maps_update_begin(); cpu_hotplug_begin();
- ret = acpi_map_lsapic(pr->handle, &pr->id); + ret = acpi_map_lsapic(pr->handle, pr->apic_id, &pr->id); if (ret) goto out;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index a5db4ae..3bc7414 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -116,7 +116,7 @@ void acpi_numa_arch_fixup(void);
#ifdef CONFIG_ACPI_HOTPLUG_CPU /* Arch dependent functions for cpu hotplug support */ -int acpi_map_lsapic(acpi_handle handle, int *pcpu); +int acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu); int acpi_unmap_lsapic(int cpu); #endif /* CONFIG_ACPI_HOTPLUG_CPU */
From: Jiang Liu jiang.liu@huawei.com
In acpi_register_lapic(), it will generates a new logical cpu number and maps to the local APIC id, this logical cpu number can be returned to simplify _acpi_map_lsapic() implementation.
Signed-off-by: Jiang Liu jiang.liu@huawei.com Signed-off-by: Hanjun Guo hanjun.guo@linaro.org --- arch/x86/include/asm/mpspec.h | 2 +- arch/x86/kernel/acpi/boot.c | 48 +++++++++++++---------------------------- arch/x86/kernel/apic/apic.c | 8 ++++--- 3 files changed, 21 insertions(+), 37 deletions(-)
diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h index 626cf70..3142a94 100644 --- a/arch/x86/include/asm/mpspec.h +++ b/arch/x86/include/asm/mpspec.h @@ -94,7 +94,7 @@ static inline void early_reserve_e820_mpc_new(void) { } #define default_get_smp_config x86_init_uint_noop #endif
-void generic_processor_info(int apicid, int version); +int generic_processor_info(int apicid, int version); #ifdef CONFIG_ACPI extern void mp_register_ioapic(int id, u32 address, u32 gsi_base); extern void mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 3e186d1..ca73370 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -195,24 +195,31 @@ static int __init acpi_parse_madt(struct acpi_table_header *table) return 0; }
-static void acpi_register_lapic(int id, u8 enabled) +/** + * acpi_register_lapic - register a local apic and generates a logic cpu number + * @id: local apic id to register + * @enabled: this cpu is enabled or not + * + * Returns the logic cpu number which maps to the local apic + */ +static int acpi_register_lapic(int id, u8 enabled) { unsigned int ver = 0;
if (id >= (MAX_LOCAL_APIC-1)) { printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); - return; + return -1; }
if (!enabled) { ++disabled_cpus; - return; + return -1; }
if (boot_cpu_physical_apicid != -1U) ver = apic_version[boot_cpu_physical_apicid];
- generic_processor_info(id, ver); + return generic_processor_info(id, ver); }
static int __init @@ -622,44 +629,19 @@ static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) { - cpumask_var_t tmp_map, new_map; int cpu; - int retval = -ENOMEM; - - if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) - goto out;
- if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) - goto free_tmp_map; - - cpumask_copy(tmp_map, cpu_present_mask); - acpi_register_lapic(physid, ACPI_MADT_ENABLED); - - /* - * If acpi_register_lapic successfully generates a new logical cpu - * number, then the following will get us exactly what was mapped - */ - cpumask_andnot(new_map, cpu_present_mask, tmp_map); - if (cpumask_empty(new_map)) { + cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); + if (cpu == -1) { printk ("Unable to map lapic to logical cpu number\n"); - retval = -EINVAL; - goto free_new_map; + return -EINVAL; }
acpi_processor_set_pdc(handle); - - cpu = cpumask_first(new_map); acpi_map_cpu2node(handle, cpu, physid);
*pcpu = cpu; - retval = 0; - -free_new_map: - free_cpumask_var(new_map); -free_tmp_map: - free_cpumask_var(tmp_map); -out: - return retval; + return 0; }
/* wrapper to silence section mismatch warning */ diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index eca89c5..87128778 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -2107,7 +2107,7 @@ void disconnect_bsp_APIC(int virt_wire_setup) apic_write(APIC_LVT1, value); }
-void generic_processor_info(int apicid, int version) +int generic_processor_info(int apicid, int version) { int cpu, max = nr_cpu_ids; bool boot_cpu_detected = physid_isset(boot_cpu_physical_apicid, @@ -2127,7 +2127,7 @@ void generic_processor_info(int apicid, int version) " Processor %d/0x%x ignored.\n", max, thiscpu, apicid);
disabled_cpus++; - return; + return -1; }
if (num_processors >= nr_cpu_ids) { @@ -2138,7 +2138,7 @@ void generic_processor_info(int apicid, int version) " Processor %d/0x%x ignored.\n", max, thiscpu, apicid);
disabled_cpus++; - return; + return -1; }
num_processors++; @@ -2183,6 +2183,8 @@ void generic_processor_info(int apicid, int version) #endif set_cpu_possible(cpu, true); set_cpu_present(cpu, true); + + return cpu; }
int hard_smp_processor_id(void)
On Saturday, August 31, 2013 06:15:58 PM Hanjun Guo wrote:
From: Jiang Liu jiang.liu@huawei.com
In acpi_register_lapic(), it will generates a new logical cpu number and maps to the local APIC id, this logical cpu number can be returned to simplify _acpi_map_lsapic() implementation.
Signed-off-by: Jiang Liu jiang.liu@huawei.com Signed-off-by: Hanjun Guo hanjun.guo@linaro.org
arch/x86/include/asm/mpspec.h | 2 +- arch/x86/kernel/acpi/boot.c | 48 +++++++++++++---------------------------- arch/x86/kernel/apic/apic.c | 8 ++++--- 3 files changed, 21 insertions(+), 37 deletions(-)
diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h index 626cf70..3142a94 100644 --- a/arch/x86/include/asm/mpspec.h +++ b/arch/x86/include/asm/mpspec.h @@ -94,7 +94,7 @@ static inline void early_reserve_e820_mpc_new(void) { } #define default_get_smp_config x86_init_uint_noop #endif -void generic_processor_info(int apicid, int version); +int generic_processor_info(int apicid, int version); #ifdef CONFIG_ACPI extern void mp_register_ioapic(int id, u32 address, u32 gsi_base); extern void mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 3e186d1..ca73370 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -195,24 +195,31 @@ static int __init acpi_parse_madt(struct acpi_table_header *table) return 0; } -static void acpi_register_lapic(int id, u8 enabled) +/**
- acpi_register_lapic - register a local apic and generates a logic cpu number
- @id: local apic id to register
- @enabled: this cpu is enabled or not
- Returns the logic cpu number which maps to the local apic
- */
+static int acpi_register_lapic(int id, u8 enabled) { unsigned int ver = 0; if (id >= (MAX_LOCAL_APIC-1)) { printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
return;
return -1;if (!enabled) { ++disabled_cpus;
return;
return -1;
If this returned -EINVAL instead of just -1, ->
if (boot_cpu_physical_apicid != -1U) ver = apic_version[boot_cpu_physical_apicid];
- generic_processor_info(id, ver);
- return generic_processor_info(id, ver);
-> and this too (on errors), -->
} static int __init @@ -622,44 +629,19 @@ static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) {
- cpumask_var_t tmp_map, new_map; int cpu;
- int retval = -ENOMEM;
- if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
goto out;
- if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
goto free_tmp_map;- cpumask_copy(tmp_map, cpu_present_mask);
- acpi_register_lapic(physid, ACPI_MADT_ENABLED);
- /*
* If acpi_register_lapic successfully generates a new logical cpu* number, then the following will get us exactly what was mapped*/- cpumask_andnot(new_map, cpu_present_mask, tmp_map);
- if (cpumask_empty(new_map)) {
- cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
- if (cpu == -1) { printk ("Unable to map lapic to logical cpu number\n");
retval = -EINVAL;goto free_new_map;
return -EINVAL;
--> then this could be
if (cpu < 0) { ... return cpu; }
acpi_processor_set_pdc(handle);
- cpu = cpumask_first(new_map); acpi_map_cpu2node(handle, cpu, physid);
*pcpu = cpu;
- retval = 0;
-free_new_map:
- free_cpumask_var(new_map);
-free_tmp_map:
- free_cpumask_var(tmp_map);
-out:
- return retval;
- return 0;
} /* wrapper to silence section mismatch warning */ diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index eca89c5..87128778 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -2107,7 +2107,7 @@ void disconnect_bsp_APIC(int virt_wire_setup) apic_write(APIC_LVT1, value); } -void generic_processor_info(int apicid, int version) +int generic_processor_info(int apicid, int version) { int cpu, max = nr_cpu_ids; bool boot_cpu_detected = physid_isset(boot_cpu_physical_apicid, @@ -2127,7 +2127,7 @@ void generic_processor_info(int apicid, int version) " Processor %d/0x%x ignored.\n", max, thiscpu, apicid); disabled_cpus++;
return;
return -1;if (num_processors >= nr_cpu_ids) { @@ -2138,7 +2138,7 @@ void generic_processor_info(int apicid, int version) " Processor %d/0x%x ignored.\n", max, thiscpu, apicid); disabled_cpus++;
return;
return -1;num_processors++; @@ -2183,6 +2183,8 @@ void generic_processor_info(int apicid, int version) #endif set_cpu_possible(cpu, true); set_cpu_present(cpu, true);
- return cpu;
} int hard_smp_processor_id(void)
On 2013-9-1 4:14, Rafael J. Wysocki wrote:
On Saturday, August 31, 2013 06:15:58 PM Hanjun Guo wrote:
[...]
+static int acpi_register_lapic(int id, u8 enabled) { unsigned int ver = 0; if (id >= (MAX_LOCAL_APIC-1)) { printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
return;
return -1;if (!enabled) { ++disabled_cpus;
return;
return -1;If this returned -EINVAL instead of just -1, ->
if (boot_cpu_physical_apicid != -1U) ver = apic_version[boot_cpu_physical_apicid];
- generic_processor_info(id, ver);
- return generic_processor_info(id, ver);
-> and this too (on errors), -->
} static int __init @@ -622,44 +629,19 @@ static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) {
- cpumask_var_t tmp_map, new_map; int cpu;
- int retval = -ENOMEM;
- if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
goto out;
- if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
goto free_tmp_map;- cpumask_copy(tmp_map, cpu_present_mask);
- acpi_register_lapic(physid, ACPI_MADT_ENABLED);
- /*
* If acpi_register_lapic successfully generates a new logical cpu* number, then the following will get us exactly what was mapped*/- cpumask_andnot(new_map, cpu_present_mask, tmp_map);
- if (cpumask_empty(new_map)) {
- cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
- if (cpu == -1) { printk ("Unable to map lapic to logical cpu number\n");
retval = -EINVAL;goto free_new_map;
return -EINVAL;--> then this could be
if (cpu < 0) { ... return cpu; }
Thanks for the suggestion, and I find out some grammar mistake in the changelog too, I will update this patch set and send out soon.
Thanks Hanjun
From: Jiang Liu jiang.liu@huawei.com
errata.smp is used by anywhere, so variable assignment is meanless, remove it.
Signed-off-by: Jiang Liu jiang.liu@huawei.com Signed-off-by: Hanjun Guo hanjun.guo@linaro.org --- drivers/acpi/acpi_processor.c | 3 --- 1 file changed, 3 deletions(-)
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 488e5d8..a2a71d0 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -220,9 +220,6 @@ static int acpi_processor_get_info(struct acpi_device *device) acpi_status status = AE_OK; static int cpu0_initialized;
- if (num_online_cpus() > 1) - errata.smp = TRUE; - acpi_processor_errata(pr);
/*
acpi_processor_errata() is only called in acpi_processor_get_info(), and the argument 'pr' passed to acpi_processor_errata() will be never NULL, so the if (!pr) check is unnecessary.
Since the 'pr' argument is not used by acpi_processor_errata() any more, so change the argument into void.
Signed-off-by: Hanjun Guo hanjun.guo@linaro.org --- drivers/acpi/acpi_processor.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index a2a71d0..d1cabe5 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -140,15 +140,11 @@ static int acpi_processor_errata_piix4(struct pci_dev *dev) return 0; }
-static int acpi_processor_errata(struct acpi_processor *pr) +static int acpi_processor_errata(void) { int result = 0; struct pci_dev *dev = NULL;
- - if (!pr) - return -EINVAL; - /* * PIIX4 */ @@ -220,7 +216,7 @@ static int acpi_processor_get_info(struct acpi_device *device) acpi_status status = AE_OK; static int cpu0_initialized;
- acpi_processor_errata(pr); + acpi_processor_errata();
/* * Check to see if we have bus mastering arbitration control. This
acpi_get_processor_id() can be find nowhere, and the acpi id is synchronized to APIC id when acpi_get_cpuid() is called, so the comments can be removed.
Signed-off-by: Hanjun Guo hanjun.guo@linaro.org --- drivers/acpi/acpi_processor.c | 5 ----- 1 file changed, 5 deletions(-)
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index d1cabe5..fa2412e 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -240,11 +240,6 @@ static int acpi_processor_get_info(struct acpi_device *device) return -ENODEV; }
- /* - * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. - * >>> 'acpi_get_processor_id(acpi_id, &id)' in - * arch/xxx/acpi.c - */ pr->acpi_id = object.processor.proc_id; } else { /*
linaro-kernel@lists.linaro.org
-
Hanjun Guo -
Rafael J. Wysocki