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fix: x86: support for new UV apic 

Don't warn in read_apic_id() when preemptible but only one CPU online.

Signed-off-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Andi Kleen 2008-04-25 11:45:26 +02:00 committed by Ingo Molnar
parent 575ca7351b
commit f6c133f7d5
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/genapic_64.c
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@ -83,7 +83,7 @@ unsigned int read_apic_id(void)
{ {
unsigned int id; unsigned int id;
WARN_ON(preemptible()); WARN_ON(preemptible() && num_online_cpus() > 1);
id = apic_read(APIC_ID); id = apic_read(APIC_ID);
if (uv_system_type >= UV_X2APIC) if (uv_system_type >= UV_X2APIC)
id |= __get_cpu_var(x2apic_extra_bits); id |= __get_cpu_var(x2apic_extra_bits);