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acpi throttling: Use this_cpu_has and simplify code current cpu 

With the this_cpu_xx we no longer need to pass an acpi
structure to the msr management code. Simplifies code and improves
performance.

NOTE: This code is x86 specific (see #ifdef CONFIG_X86) but not under
      arch/x86.

Signed-off-by: Christoph Lameter <cl@linux.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Christoph Lameter 2011-03-12 12:51:12 +01:00 committed by Tejun Heo
parent fe5042138b
commit 9d42a53e0f
1 changed files with 10 additions and 22 deletions
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32
drivers/acpi/processor_throttling.c
View File

@ -710,20 +710,14 @@ static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr)
} }
#ifdef CONFIG_X86 #ifdef CONFIG_X86
static int acpi_throttling_rdmsr(struct acpi_processor *pr, static int acpi_throttling_rdmsr(u64 *value)
u64 *value)
{ {
struct cpuinfo_x86 *c;
u64 msr_high, msr_low; u64 msr_high, msr_low;
unsigned int cpu;
u64 msr = 0; u64 msr = 0;
int ret = -1; int ret = -1;
cpu = pr->id; if ((this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_INTEL) ||
c = &cpu_data(cpu); !this_cpu_has(X86_FEATURE_ACPI)) {
if ((c->x86_vendor != X86_VENDOR_INTEL) ||
!cpu_has(c, X86_FEATURE_ACPI)) {
printk(KERN_ERR PREFIX printk(KERN_ERR PREFIX
"HARDWARE addr space,NOT supported yet\n"); "HARDWARE addr space,NOT supported yet\n");
} else { } else {
@ -738,18 +732,13 @@ static int acpi_throttling_rdmsr(struct acpi_processor *pr,
return ret; return ret;
} }
static int acpi_throttling_wrmsr(struct acpi_processor *pr, u64 value) static int acpi_throttling_wrmsr(u64 value)
{ {
struct cpuinfo_x86 *c;
unsigned int cpu;
int ret = -1; int ret = -1;
u64 msr; u64 msr;
cpu = pr->id; if ((this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_INTEL) ||
c = &cpu_data(cpu); !this_cpu_has(X86_FEATURE_ACPI)) {
if ((c->x86_vendor != X86_VENDOR_INTEL) ||
!cpu_has(c, X86_FEATURE_ACPI)) {
printk(KERN_ERR PREFIX printk(KERN_ERR PREFIX
"HARDWARE addr space,NOT supported yet\n"); "HARDWARE addr space,NOT supported yet\n");
} else { } else {
@ -761,15 +750,14 @@ static int acpi_throttling_wrmsr(struct acpi_processor *pr, u64 value)
return ret; return ret;
} }
#else #else
static int acpi_throttling_rdmsr(struct acpi_processor *pr, static int acpi_throttling_rdmsr(u64 *value)
u64 *value)
{ {
printk(KERN_ERR PREFIX printk(KERN_ERR PREFIX
"HARDWARE addr space,NOT supported yet\n"); "HARDWARE addr space,NOT supported yet\n");
return -1; return -1;
} }
static int acpi_throttling_wrmsr(struct acpi_processor *pr, u64 value) static int acpi_throttling_wrmsr(u64 value)
{ {
printk(KERN_ERR PREFIX printk(KERN_ERR PREFIX
"HARDWARE addr space,NOT supported yet\n"); "HARDWARE addr space,NOT supported yet\n");
@ -801,7 +789,7 @@ static int acpi_read_throttling_status(struct acpi_processor *pr,
ret = 0; ret = 0;
break; break;
case ACPI_ADR_SPACE_FIXED_HARDWARE: case ACPI_ADR_SPACE_FIXED_HARDWARE:
ret = acpi_throttling_rdmsr(pr, value); ret = acpi_throttling_rdmsr(value);
break; break;
default: default:
printk(KERN_ERR PREFIX "Unknown addr space %d\n", printk(KERN_ERR PREFIX "Unknown addr space %d\n",
@ -834,7 +822,7 @@ static int acpi_write_throttling_state(struct acpi_processor *pr,
ret = 0; ret = 0;
break; break;
case ACPI_ADR_SPACE_FIXED_HARDWARE: case ACPI_ADR_SPACE_FIXED_HARDWARE:
ret = acpi_throttling_wrmsr(pr, value); ret = acpi_throttling_wrmsr(value);
break; break;
default: default:
printk(KERN_ERR PREFIX "Unknown addr space %d\n", printk(KERN_ERR PREFIX "Unknown addr space %d\n",