x86: convert cpuinfo_x86 array to a per_cpu array

cpu_data is currently an array defined using NR_CPUS.  This means that
we overallocate since we will rarely really use maximum configured cpus.
When NR_CPU count is raised to 4096 the size of cpu_data becomes
3,145,728 bytes.

These changes were adopted from the sparc64 (and ia64) code.  An
additional field was added to cpuinfo_x86 to be a non-ambiguous cpu
index.  This corresponds to the index into a cpumask_t as well as the
per_cpu index.  It's used in various places like show_cpuinfo().

cpu_data is defined to be the boot_cpu_data structure for the NON-SMP
case.

Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

11 files changed, 19 insertions, 19 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 2ca43ba32bc..fea0af0476b 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -77,7 +77,7 @@ static unsigned int acpi_pstate_strict;
 
 static int check_est_cpu(unsigned int cpuid)
 {
-	struct cpuinfo_x86 *cpu = &cpu_data[cpuid];
+	struct cpuinfo_x86 *cpu = &cpu_data(cpuid);
 
 	if (cpu->x86_vendor != X86_VENDOR_INTEL ||
 	    !cpu_has(cpu, X86_FEATURE_EST))
@@ -560,7 +560,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	unsigned int cpu = policy->cpu;
 	struct acpi_cpufreq_data *data;
 	unsigned int result = 0;
-	struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
+	struct cpuinfo_x86 *c = &cpu_data(policy->cpu);
 	struct acpi_processor_performance *perf;
 
 	dprintk("acpi_cpufreq_cpu_init\n");
diff --git a/arch/x86/kernel/cpu/cpufreq/e_powersaver.c b/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
index c11baaf9f2b..326a4c81f68 100644
--- a/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
+++ b/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
@@ -305,7 +305,7 @@ static struct cpufreq_driver eps_driver = {
 
 static int __init eps_init(void)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 
 	/* This driver will work only on Centaur C7 processors with
 	 * Enhanced SpeedStep/PowerSaver registers */
diff --git a/arch/x86/kernel/cpu/cpufreq/elanfreq.c b/arch/x86/kernel/cpu/cpufreq/elanfreq.c
index 1e7ae7dafcf..94619c22f56 100644
--- a/arch/x86/kernel/cpu/cpufreq/elanfreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/elanfreq.c
@@ -199,7 +199,7 @@ static int elanfreq_target (struct cpufreq_policy *policy,
 
 static int elanfreq_cpu_init(struct cpufreq_policy *policy)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 	unsigned int i;
 	int result;
 
@@ -280,7 +280,7 @@ static struct cpufreq_driver elanfreq_driver = {
 
 static int __init elanfreq_init(void)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 
 	/* Test if we have the right hardware */
 	if ((c->x86_vendor != X86_VENDOR_AMD) ||
diff --git a/arch/x86/kernel/cpu/cpufreq/longhaul.c b/arch/x86/kernel/cpu/cpufreq/longhaul.c
index 5045f5d583c..749d00cb2eb 100644
--- a/arch/x86/kernel/cpu/cpufreq/longhaul.c
+++ b/arch/x86/kernel/cpu/cpufreq/longhaul.c
@@ -780,7 +780,7 @@ static int longhaul_setup_southbridge(void)
 
 static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 	char *cpuname=NULL;
 	int ret;
 	u32 lo, hi;
@@ -959,7 +959,7 @@ static struct cpufreq_driver longhaul_driver = {
 
 static int __init longhaul_init(void)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 
 	if (c->x86_vendor != X86_VENDOR_CENTAUR || c->x86 != 6)
 		return -ENODEV;
diff --git a/arch/x86/kernel/cpu/cpufreq/longrun.c b/arch/x86/kernel/cpu/cpufreq/longrun.c
index b2689514295..af4a867a097 100644
--- a/arch/x86/kernel/cpu/cpufreq/longrun.c
+++ b/arch/x86/kernel/cpu/cpufreq/longrun.c
@@ -172,7 +172,7 @@ static unsigned int __init longrun_determine_freqs(unsigned int *low_freq,
 	u32 save_lo, save_hi;
 	u32 eax, ebx, ecx, edx;
 	u32 try_hi;
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 
 	if (!low_freq || !high_freq)
 		return -EINVAL;
@@ -298,7 +298,7 @@ static struct cpufreq_driver longrun_driver = {
  */
 static int __init longrun_init(void)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 
 	if (c->x86_vendor != X86_VENDOR_TRANSMETA ||
 	    !cpu_has(c, X86_FEATURE_LONGRUN))
diff --git a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
index 793eae854f4..14791ec55cf 100644
--- a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
+++ b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
@@ -195,7 +195,7 @@ static unsigned int cpufreq_p4_get_frequency(struct cpuinfo_x86 *c)
 
 static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy)
 {
-	struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
+	struct cpuinfo_x86 *c = &cpu_data(policy->cpu);
 	int cpuid = 0;
 	unsigned int i;
 
@@ -279,7 +279,7 @@ static struct cpufreq_driver p4clockmod_driver = {
 
 static int __init cpufreq_p4_init(void)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 	int ret;
 
 	/*
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
index 6d028533931..42405b4e34e 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
@@ -215,7 +215,7 @@ static struct cpufreq_driver powernow_k6_driver = {
  */
 static int __init powernow_k6_init(void)
 {
-	struct cpuinfo_x86      *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 
 	if ((c->x86_vendor != X86_VENDOR_AMD) || (c->x86 != 5) ||
 		((c->x86_model != 12) && (c->x86_model != 13)))
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
index f3686a5f230..b5a9863d6cd 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
@@ -114,7 +114,7 @@ static int check_fsb(unsigned int fsbspeed)
 
 static int check_powernow(void)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 	unsigned int maxei, eax, ebx, ecx, edx;
 
 	if ((c->x86_vendor != X86_VENDOR_AMD) || (c->x86 !=6)) {
diff --git a/arch/x86/kernel/cpu/cpufreq/sc520_freq.c b/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
index d9f3e90a7ae..42da9bd677d 100644
--- a/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
+++ b/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
@@ -102,7 +102,7 @@ static int sc520_freq_target (struct cpufreq_policy *policy,
 
 static int sc520_freq_cpu_init(struct cpufreq_policy *policy)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 	int result;
 
 	/* capability check */
@@ -151,7 +151,7 @@ static struct cpufreq_driver sc520_freq_driver = {
 
 static int __init sc520_freq_init(void)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 	int err;
 
 	/* Test if we have the right hardware */
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
index 811d4743854..3031f119619 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -230,7 +230,7 @@ static struct cpu_model models[] =
 
 static int centrino_cpu_init_table(struct cpufreq_policy *policy)
 {
-	struct cpuinfo_x86 *cpu = &cpu_data[policy->cpu];
+	struct cpuinfo_x86 *cpu = &cpu_data(policy->cpu);
 	struct cpu_model *model;
 
 	for(model = models; model->cpu_id != NULL; model++)
@@ -340,7 +340,7 @@ static unsigned int get_cur_freq(unsigned int cpu)
 
 static int centrino_cpu_init(struct cpufreq_policy *policy)
 {
-	struct cpuinfo_x86 *cpu = &cpu_data[policy->cpu];
+	struct cpuinfo_x86 *cpu = &cpu_data(policy->cpu);
 	unsigned freq;
 	unsigned l, h;
 	int ret;
@@ -612,7 +612,7 @@ static struct cpufreq_driver centrino_driver = {
  */
 static int __init centrino_init(void)
 {
-	struct cpuinfo_x86 *cpu = cpu_data;
+	struct cpuinfo_x86 *cpu = &cpu_data(0);
 
 	if (!cpu_has(cpu, X86_FEATURE_EST))
 		return -ENODEV;
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
index b1acc8ce316..76c3ab0da46 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-lib.c
@@ -228,7 +228,7 @@ EXPORT_SYMBOL_GPL(speedstep_get_processor_frequency);
 
 unsigned int speedstep_detect_processor (void)
 {
-	struct cpuinfo_x86 *c = cpu_data;
+	struct cpuinfo_x86 *c = &cpu_data(0);
 	u32 ebx, msr_lo, msr_hi;
 
 	dprintk("x86: %x, model: %x\n", c->x86, c->x86_model);