summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/ds.c
diff options
context:
space:
mode:
authorMarkus Metzger <markus.t.metzger@intel.com>2009-04-03 16:43:47 +0200
committerIngo Molnar <mingo@elte.hu>2009-04-07 13:36:29 +0200
commitee811517a5604aa63fae803b7c044712699e1303 (patch)
treeec82f4ec9ae246a6e73f94693cb9d034d14647c5 /arch/x86/kernel/ds.c
parent2311f0de21c17b2a8b960677a9cccfbfa52beb35 (diff)
downloadop-kernel-dev-ee811517a5604aa63fae803b7c044712699e1303.zip
op-kernel-dev-ee811517a5604aa63fae803b7c044712699e1303.tar.gz
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>
Diffstat (limited to 'arch/x86/kernel/ds.c')
-rw-r--r--arch/x86/kernel/ds.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c
index 71cab3b..443f415 100644
--- a/arch/x86/kernel/ds.c
+++ b/arch/x86/kernel/ds.c
@@ -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) {
OpenPOWER on IntegriCloud