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x86, ds: use single debug store cpu configuration 

Use a single configuration for all cpus.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Cc: roland@redhat.com
Cc: eranian@googlemail.com
Cc: oleg@redhat.com
Cc: juan.villacis@intel.com
Cc: ak@linux.jf.intel.com
LKML-Reference: <20090403144602.191165000@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Markus Metzger 2009-04-03 16:43:47 +02:00 committed by Ingo Molnar
parent 2311f0de21
commit ee811517a5
1 changed files with 5 additions and 2 deletions
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7
arch/x86/kernel/ds.c
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@ -47,9 +47,8 @@ struct ds_configuration {
/* Control bit-masks indexed by enum ds_feature: */
unsigned long ctl[dsf_ctl_max];
};
static DEFINE_PER_CPU(struct ds_configuration, ds_cfg_array);
static struct ds_configuration ds_cfg __read_mostly;
#define ds_cfg per_cpu(ds_cfg_array, smp_processor_id())
/* Maximal size of a DS configuration: */
#define MAX_SIZEOF_DS (12 * 8)
@ -1268,6 +1267,10 @@ ds_configure(const struct ds_configuration *cfg,
void __cpuinit ds_init_intel(struct cpuinfo_x86 *c)
{
/* Only configure the first cpu. Others are identical. */
if (ds_cfg.name)
return;
switch (c->x86) {
case 0x6:
switch (c->x86_model) {