[PATCH] x86_64: Use X86_FEATURE_CONSTANT_TSC now to clean up Intel speedstep drivers

They previously tried to figure this out on their own.

Suggested by Venkatesh.

Cc: venkatesh.pallipadi@intel.com
Cc: davej@redhat.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 4 insertions, 31 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
index 871366b83b3..7975e79d5fa 100644
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -40,8 +40,6 @@
 #include <linux/acpi.h>
 #include <acpi/processor.h>
 
-#include "speedstep-est-common.h"
-
 #define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "acpi-cpufreq", msg)
 
 MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski");
@@ -367,6 +365,7 @@ acpi_cpufreq_cpu_init (
         unsigned int            cpu = policy->cpu;
         struct cpufreq_acpi_io  *data;
         unsigned int            result = 0;
+        struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
 
         union acpi_object               arg0 = {ACPI_TYPE_BUFFER};
         u32                             arg0_buf[3];
@@ -390,7 +389,7 @@ acpi_cpufreq_cpu_init (
         if (result)
                 goto err_free;
 
-        if (is_const_loops_cpu(cpu)) {
+        if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) {
                 acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS;
         }
 
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
index edb9873e27e..9a826cde4fd 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -35,8 +35,6 @@
 #include <asm/processor.h>
 #include <asm/cpufeature.h>
 
-#include "speedstep-est-common.h"
-
 #define PFX             "speedstep-centrino: "
 #define MAINTAINER      "Jeremy Fitzhardinge <jeremy@goop.org>"
 
@@ -493,12 +491,13 @@ static int centrino_cpu_init(struct cpufreq_policy *policy)
         unsigned l, h;
         int ret;
         int i;
+        struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
 
         /* Only Intel makes Enhanced Speedstep-capable CPUs */
         if (cpu->x86_vendor != X86_VENDOR_INTEL || !cpu_has(cpu, X86_FEATURE_EST))
                 return -ENODEV;
 
-        if (is_const_loops_cpu(policy->cpu)) {
+        if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) {
                 centrino_driver.flags |= CPUFREQ_CONST_LOOPS;
         }
 
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-est-common.h b/arch/i386/kernel/cpu/cpufreq/speedstep-est-common.h
deleted file mode 100644
index 5ce995c9d86..00000000000
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-est-common.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Routines common for drivers handling Enhanced Speedstep Technology
- *  Copyright (C) 2004 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
- *
- *  Licensed under the terms of the GNU GPL License version 2 -- see
- *  COPYING for details.
- */
-
-static inline int is_const_loops_cpu(unsigned int cpu)
-{
-        struct cpuinfo_x86      *c = cpu_data + cpu;
-
-        if (c->x86_vendor != X86_VENDOR_INTEL || !cpu_has(c, X86_FEATURE_EST))
-                return 0;
-
-        /*
-         * on P-4s, the TSC runs with constant frequency independent of cpu freq
-         * when we use EST
-         */
-        if (c->x86 == 0xf)
-                return 1;
-
-        return 0;
-}
-