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ACPI / processor: use apic_id and remove duplicated _MAT evaluation 

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>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jiang Liu 2013-09-02 11:57:35 +08:00 committed by Rafael J. Wysocki
parent ca9f62ac78
commit d536bf3dc9
4 changed files with 9 additions and 71 deletions
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38
arch/ia64/kernel/acpi.c
View File

@ -882,40 +882,10 @@ __init void prefill_possible_map(void)
set_cpu_possible(i, true); 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; cpumask_t tmp_map;
int cpu, physid; int cpu;
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;
cpumask_complement(&tmp_map, cpu_present_mask); cpumask_complement(&tmp_map, cpu_present_mask);
cpu = cpumask_first(&tmp_map); 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 */ /* 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); EXPORT_SYMBOL(acpi_map_lsapic);

38
arch/x86/kernel/acpi/boot.c
View File

@ -614,44 +614,12 @@ static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
#endif #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; cpumask_var_t tmp_map, new_map;
u8 physid;
int cpu; int cpu;
int retval = -ENOMEM; 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)) if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
goto out; goto out;
@ -689,9 +657,9 @@ out:
} }
/* wrapper to silence section mismatch warning */ /* 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); EXPORT_SYMBOL(acpi_map_lsapic);

2
drivers/acpi/acpi_processor.c
View File

@ -181,7 +181,7 @@ static int acpi_processor_hotadd_init(struct acpi_processor *pr)
cpu_maps_update_begin(); cpu_maps_update_begin();
cpu_hotplug_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) if (ret)
goto out; goto out;

2
include/linux/acpi.h
View File

@ -116,7 +116,7 @@ void acpi_numa_arch_fixup(void);
#ifdef CONFIG_ACPI_HOTPLUG_CPU #ifdef CONFIG_ACPI_HOTPLUG_CPU
/* Arch dependent functions for cpu hotplug support */ /* 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); int acpi_unmap_lsapic(int cpu);
#endif /* CONFIG_ACPI_HOTPLUG_CPU */ #endif /* CONFIG_ACPI_HOTPLUG_CPU */