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x86: convert cpuinfo_x86 array to a per_cpu array

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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>
This commit is contained in:
Mike Travis 2007-10-19 20:35:04 +02:00 • committed by Thomas Gleixner
parent f1df280f53
commit 92cb7612ae
39 changed files with 148 additions and 128 deletions
Download patch file Download diff file Expand all files Collapse all files

6
arch/x86/kernel/microcode.c
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@ -132,7 +132,7 @@ static struct ucode_cpu_info {
static void collect_cpu_info(int cpu_num)
{
struct cpuinfo_x86 *c = cpu_data + cpu_num;
struct cpuinfo_x86 *c = &cpu_data(cpu_num);
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
unsigned int val[2];
@ -522,7 +522,7 @@ static struct platform_device *microcode_pdev;
static int cpu_request_microcode(int cpu)
{
char name[30];
struct cpuinfo_x86 *c = cpu_data + cpu;
struct cpuinfo_x86 *c = &cpu_data(cpu);
const struct firmware *firmware;
void *buf;
unsigned long size;
@ -570,7 +570,7 @@ static int cpu_request_microcode(int cpu)
static int apply_microcode_check_cpu(int cpu)
{
struct cpuinfo_x86 *c = cpu_data + cpu;
struct cpuinfo_x86 *c = &cpu_data(cpu);
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
cpumask_t old;
unsigned int val[2];