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>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 6f66551d9e51..5c82ec7f8bbd 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -150,7 +150,7 @@ static struct coretemp_data *coretemp_update_device(struct device *dev)
 static int __devinit coretemp_probe(struct platform_device *pdev)
 {
         struct coretemp_data *data;
-        struct cpuinfo_x86 *c = &(cpu_data)[pdev->id];
+        struct cpuinfo_x86 *c = &cpu_data(pdev->id);
         int err;
         u32 eax, edx;
 
@@ -359,7 +359,7 @@ static int __init coretemp_init(void)
         struct pdev_entry *p, *n;
 
         /* quick check if we run Intel */
-        if (cpu_data[0].x86_vendor != X86_VENDOR_INTEL)
+        if (cpu_data(0).x86_vendor != X86_VENDOR_INTEL)
                 goto exit;
 
         err = platform_driver_register(&coretemp_driver);
@@ -367,7 +367,7 @@ static int __init coretemp_init(void)
                 goto exit;
 
         for_each_online_cpu(i) {
-                struct cpuinfo_x86 *c = &(cpu_data)[i];
+                struct cpuinfo_x86 *c = &cpu_data(i);
 
                 /* check if family 6, models e, f, 16 */
                 if ((c->cpuid_level < 0) || (c->x86 != 0x6) ||