From f6c133f7d5ee3b82f5b34b988e897ea38cd8219c Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Fri, 25 Apr 2008 11:45:26 +0200 Subject: [PATCH] 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 Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/genapic_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/genapic_64.c b/arch/x86/kernel/genapic_64.c index 021624c835..cbaaf69bed 100644 --- a/arch/x86/kernel/genapic_64.c +++ b/arch/x86/kernel/genapic_64.c @@ -83,7 +83,7 @@ unsigned int read_apic_id(void) { unsigned int id; - WARN_ON(preemptible()); + WARN_ON(preemptible() && num_online_cpus() > 1); id = apic_read(APIC_ID); if (uv_system_type >= UV_X2APIC) id |= __get_cpu_var(x2apic_extra_bits); -- 2.39.5