From 9d42a53e0f46505b39494041d514372235817e15 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Sat, 12 Mar 2011 12:51:12 +0100 Subject: [PATCH] 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 Acked-by: Tejun Heo Signed-off-by: Tejun Heo --- drivers/acpi/processor_throttling.c | 32 +++++++++-------------------- 1 file changed, 10 insertions(+), 22 deletions(-) diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c index fa84e9744330..6f2c6d914cbc 100644 --- a/drivers/acpi/processor_throttling.c +++ b/drivers/acpi/processor_throttling.c @@ -710,20 +710,14 @@ static int acpi_processor_get_throttling_fadt(struct acpi_processor *pr) } #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 { @@ -738,18 +732,13 @@ static int acpi_throttling_rdmsr(struct acpi_processor *pr, 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 { @@ -761,15 +750,14 @@ static int acpi_throttling_wrmsr(struct acpi_processor *pr, u64 value) 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"); @@ -801,7 +789,7 @@ static int acpi_read_throttling_status(struct acpi_processor *pr, 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", @@ -834,7 +822,7 @@ static int acpi_write_throttling_state(struct acpi_processor *pr, 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", -- 2.34.1