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Subjectacpi throttling: Use this_cpu_has and simplify code

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

Signed-off-by: Christoph Lameter <cl@linux.com>

---
drivers/acpi/processor_throttling.c | 32 ++++++++++----------------------
1 file changed, 10 insertions(+), 22 deletions(-)
Index: linux-2.6/drivers/acpi/processor_throttling.c
===================================================================
--- linux-2.6.orig/drivers/acpi/processor_throttling.c 2010-12-16 11:56:57.000000000 -0600
+++ linux-2.6/drivers/acpi/processor_throttling.c 2010-12-16 12:00:17.000000000 -0600
@@ -662,20 +662,14 @@ static int acpi_processor_get_throttling
}

#ifdef CONFIG_X86
-static int acpi_throttling_rdmsr(struct acpi_processor *pr,
- u64 *value)
+static int acpi_throttling_rdmsr(u64 *value)
{
- struct cpuinfo_x86 *c;
u64 msr_high, msr_low;
- unsigned int cpu;
u64 msr = 0;
int ret = -1;

- cpu = pr->id;
- c = &cpu_data(cpu);
-
- if ((c->x86_vendor != X86_VENDOR_INTEL) ||
- !cpu_has(c, X86_FEATURE_ACPI)) {
+ if ((this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_INTEL) ||
+ !this_cpu_has(X86_FEATURE_ACPI)) {
printk(KERN_ERR PREFIX
"HARDWARE addr space,NOT supported yet\n");
} else {
@@ -690,18 +684,13 @@ static int acpi_throttling_rdmsr(struct
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;
u64 msr;

- cpu = pr->id;
- c = &cpu_data(cpu);
-
- if ((c->x86_vendor != X86_VENDOR_INTEL) ||
- !cpu_has(c, X86_FEATURE_ACPI)) {
+ if ((this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_INTEL) ||
+ !this_cpu_has(X86_FEATURE_ACPI)) {
printk(KERN_ERR PREFIX
"HARDWARE addr space,NOT supported yet\n");
} else {
@@ -713,15 +702,14 @@ static int acpi_throttling_wrmsr(struct
return ret;
}
#else
-static int acpi_throttling_rdmsr(struct acpi_processor *pr,
- u64 *value)
+static int acpi_throttling_rdmsr(u64 *value)
{
printk(KERN_ERR PREFIX
"HARDWARE addr space,NOT supported yet\n");
return -1;
}

-static int acpi_throttling_wrmsr(struct acpi_processor *pr, u64 value)
+static int acpi_throttling_wrmsr(u64 value)
{
printk(KERN_ERR PREFIX
"HARDWARE addr space,NOT supported yet\n");
@@ -753,7 +741,7 @@ static int acpi_read_throttling_status(s
ret = 0;
break;
case ACPI_ADR_SPACE_FIXED_HARDWARE:
- ret = acpi_throttling_rdmsr(pr, value);
+ ret = acpi_throttling_rdmsr(value);
break;
default:
printk(KERN_ERR PREFIX "Unknown addr space %d\n",
@@ -786,7 +774,7 @@ static int acpi_write_throttling_state(s
ret = 0;
break;
case ACPI_ADR_SPACE_FIXED_HARDWARE:
- ret = acpi_throttling_wrmsr(pr, value);
+ ret = acpi_throttling_wrmsr(value);
break;
default:
printk(KERN_ERR PREFIX "Unknown addr space %d\n",


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