diff options
Diffstat (limited to 'kernel/sched/isolation.c')
| -rw-r--r-- | kernel/sched/isolation.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index 373d42c707bc5d..2a262d3ecb3da4 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -46,7 +46,16 @@ int housekeeping_any_cpu(enum hk_type type) if (cpu < nr_cpu_ids) return cpu; - return cpumask_any_and(housekeeping.cpumasks[type], cpu_online_mask); + cpu = cpumask_any_and(housekeeping.cpumasks[type], cpu_online_mask); + if (likely(cpu < nr_cpu_ids)) + return cpu; + /* + * Unless we have another problem this can only happen + * at boot time before start_secondary() brings the 1st + * housekeeping CPU up. + */ + WARN_ON_ONCE(system_state == SYSTEM_RUNNING || + type != HK_TYPE_TIMER); } } return smp_processor_id(); |