Use a single configuration for all cpus.
Initialize once for the first cpu. Change the warning since the function
is now called only once.
Reported-by: Ingo Molnar <[email protected]>
Signed-off-by: Markus Metzger <[email protected]>
---
Index: git-tip/arch/x86/kernel/ds.c
===================================================================
--- git-tip.orig/arch/x86/kernel/ds.c 2009-03-27 08:04:53.000000000 +0100
+++ git-tip/arch/x86/kernel/ds.c 2009-03-27 08:04:58.000000000 +0100
@@ -46,9 +46,8 @@ 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)
@@ -1223,11 +1222,15 @@ ds_configure(const struct ds_configurati
printk("bts/pebs record: %u/%u bytes\n",
ds_cfg.sizeof_rec[ds_bts], ds_cfg.sizeof_rec[ds_pebs]);
- WARN_ON_ONCE(MAX_SIZEOF_DS < (12 * ds_cfg.sizeof_ptr_field));
+ WARN_ON(MAX_SIZEOF_DS < (12 * ds_cfg.sizeof_ptr_field));
}
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) {
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