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x86: don't call read_apic_id if !cpu_has_apic

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should not call that if apic is disabled.

[ Impact: fix crash on certain UP configs ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
LKML-Reference: <4A09CCBB.2000306@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2009-05-15 13:05:16 -07:00 committed by Ingo Molnar
parent e5198075c6
commit 2759c3287d
4 changed files with 11 additions and 5 deletions
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2
arch/x86/kernel/apic/apic_flat_64.c
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@ -161,7 +161,7 @@ static int flat_apic_id_registered(void)
static int flat_phys_pkg_id(int initial_apic_id, int index_msb)
{
return hard_smp_processor_id() >> index_msb;
return initial_apic_id >> index_msb;
}
struct apic apic_flat = {

2
arch/x86/kernel/cpu/amd.c
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@ -272,7 +272,7 @@ static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
int cpu = smp_processor_id();
int node;
unsigned apicid = hard_smp_processor_id();
unsigned apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid;
node = c->phys_proc_id;
if (apicid_to_node[apicid] != NUMA_NO_NODE)

6
arch/x86/kernel/cpu/common.c
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@ -761,6 +761,12 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
if (this_cpu->c_identify)
this_cpu->c_identify(c);
/* Clear/Set all flags overriden by options, after probe */
for (i = 0; i < NCAPINTS; i++) {
c->x86_capability[i] &= ~cpu_caps_cleared[i];
c->x86_capability[i] |= cpu_caps_set[i];
}
#ifdef CONFIG_X86_64
c->apicid = apic->phys_pkg_id(c->initial_apicid, 0);
#endif

6
arch/x86/kernel/cpu/intel.c
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@ -229,12 +229,12 @@ static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
}
#endif
static void __cpuinit srat_detect_node(void)
static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
{
#if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
unsigned node;
int cpu = smp_processor_id();
int apicid = hard_smp_processor_id();
int apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid;
/* Don't do the funky fallback heuristics the AMD version employs
for now. */
@ -400,7 +400,7 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
}
/* Work around errata */
srat_detect_node();
srat_detect_node(c);
if (cpu_has(c, X86_FEATURE_VMX))
detect_vmx_virtcap(c);