From e67e4ad4b161bd60b9da4c1872a9d77e0cac95fa Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 5 Aug 2024 21:21:13 +0200 Subject: Merging upstream version 6.9.7. Signed-off-by: Daniel Baumann --- kernel/sched/isolation.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'kernel/sched/isolation.c') diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index 82e2f7fc7c..5891e715f0 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(); -- cgit v1.2.3