[PATCH] x86: use hard_smp_processor_id to get apic id for amd k8cpus

From: Yinghai Lu
Date: Sat Aug 29 2009 - 16:22:22 EST



otherwise, system with apci id lifting will have wrong apicid in
/proc/cpuinfo

and use that in srat_detect_node

Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Acked-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>

---
arch/x86/kernel/cpu/amd.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

Index: linux-2.6/arch/x86/kernel/cpu/amd.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/cpu/amd.c
+++ linux-2.6/arch/x86/kernel/cpu/amd.c
@@ -277,7 +277,7 @@ static void __cpuinit srat_detect_node(s
#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
int cpu = smp_processor_id();
int node;
- unsigned apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid;
+ unsigned apicid = c->apicid;

node = c->phys_proc_id;
if (apicid_to_node[apicid] != NUMA_NO_NODE)
@@ -437,6 +437,9 @@ static void __cpuinit init_amd(struct cp
}
if (c->x86 == 0x10 || c->x86 == 0x11)
set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+
+ /* get apicid instead of initial apic id from cpuid */
+ c->apicid = hard_smp_processor_id();
#else

/*
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/