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authorMike Travis <travis@sgi.com>2009-01-16 15:22:16 -0800
committerIngo Molnar <mingo@elte.hu>2009-01-18 21:15:27 +0100
commitb2b815d80a5c4e5b50be0a98aba8c445ce8f3e1f (patch)
tree3d1acce71d3917d1aadb4a59603d99330530abc8
parent64dec40ddee9d36d7b83f8a0513fdeaffe260a0e (diff)
x86: put trigger in to detect mismatched apic versions
Impact: add debug warning Fire off one message if two apic's discovered with different apic versions. (this code is only called during CPU init) The goal of this is to pave the way of the removal of the apic_version[] array. We dont expect any apic version incompatibilities in the x86 landscape of systems [if so we dont handle them very well and probably never will handle deep apic version assymetries well], but it's prudent to have a debug check for one kernel cycle nevertheless. Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/kernel/apic.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index d19aa3aab62..4b6df2469fe 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -1837,6 +1837,11 @@ void __cpuinit generic_processor_info(int apicid, int version)
num_processors++;
cpu = cpumask_next_zero(-1, cpu_present_mask);
+ if (version != apic_version[boot_cpu_physical_apicid])
+ WARN_ONCE(1,
+ "ACPI: apic version mismatch, bootcpu: %x cpu %d: %x\n",
+ apic_version[boot_cpu_physical_apicid], cpu, version);
+
physid_set(apicid, phys_cpu_present_map);
if (apicid == boot_cpu_physical_apicid) {
/*