diff options
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 5da35d2cdbd..22bf6c29454 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -1101,6 +1101,7 @@ static __init void disable_smp(void) */ static int __init smp_sanity_check(unsigned max_cpus) { + preempt_disable(); if (!physid_isset(hard_smp_processor_id(), phys_cpu_present_map)) { printk(KERN_WARNING "weird, boot CPU (#%d) not listed" "by the BIOS.\n", hard_smp_processor_id()); @@ -1112,6 +1113,7 @@ static int __init smp_sanity_check(unsigned max_cpus) * get out of here now! */ if (!smp_found_config && !acpi_lapic) { + preempt_enable(); printk(KERN_NOTICE "SMP motherboard not detected.\n"); disable_smp(); if (APIC_init_uniprocessor()) @@ -1130,6 +1132,7 @@ static int __init smp_sanity_check(unsigned max_cpus) boot_cpu_physical_apicid); physid_set(hard_smp_processor_id(), phys_cpu_present_map); } + preempt_enable(); /* * If we couldn't find a local APIC, then get out of here now! @@ -1205,11 +1208,13 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus) return; } + preempt_disable(); if (GET_APIC_ID(read_apic_id()) != boot_cpu_physical_apicid) { panic("Boot APIC ID in local APIC unexpected (%d vs %d)", GET_APIC_ID(read_apic_id()), boot_cpu_physical_apicid); /* Or can we switch back to PIC here? */ } + preempt_enable(); #ifdef CONFIG_X86_32 connect_bsp_APIC(); |