diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/tsc_sync.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c index 8fde44f8cfec..a75f696011d5 100644 --- a/arch/x86/kernel/tsc_sync.c +++ b/arch/x86/kernel/tsc_sync.c @@ -84,6 +84,7 @@ bool tsc_store_and_check_tsc_adjust(void) { struct tsc_adjust *ref, *cur = this_cpu_ptr(&tsc_adjust); unsigned int refcpu, cpu = smp_processor_id(); + struct cpumask *mask; s64 bootval; if (!boot_cpu_has(X86_FEATURE_TSC_ADJUST)) @@ -98,9 +99,11 @@ bool tsc_store_and_check_tsc_adjust(void) * Check whether this CPU is the first in a package to come up. In * this case do not check the boot value against another package * because the package might have been physically hotplugged, where - * TSC_ADJUST is expected to be different. + * TSC_ADJUST is expected to be different. When called on the boot + * CPU topology_core_cpumask() might not be available yet. */ - refcpu = cpumask_any_but(topology_core_cpumask(cpu), cpu); + mask = topology_core_cpumask(cpu); + refcpu = mask ? cpumask_any_but(mask, cpu) : nr_cpu_ids; if (refcpu >= nr_cpu_ids) { /* |