diff options
| -rw-r--r-- | arch/x86/kernel/cpu/topology.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/x86/kernel/cpu/topology.c b/arch/x86/kernel/cpu/topology.c index f3397e233ffb..aea408de3be4 100644 --- a/arch/x86/kernel/cpu/topology.c +++ b/arch/x86/kernel/cpu/topology.c @@ -76,10 +76,7 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id) #ifdef CONFIG_SMP static void cpu_mark_primary_thread(unsigned int cpu, unsigned int apicid) { - /* Isolate the SMT bit(s) in the APICID and check for 0 */ - u32 mask = (1U << (fls(smp_num_siblings) - 1)) - 1; - - if (smp_num_siblings == 1 || !(apicid & mask)) + if (!(apicid & (smp_num_siblings - 1))) cpumask_set_cpu(cpu, &__cpu_primary_thread_mask); } #else |