diff options
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index be78c07f72ca..d3575f5ec6d2 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -118,9 +118,11 @@ static void handle_update(struct work_struct *work); static BLOCKING_NOTIFIER_HEAD(cpufreq_policy_notifier_list); static struct srcu_notifier_head cpufreq_transition_notifier_list; +static bool init_cpufreq_transition_notifier_list_called; static int __init init_cpufreq_transition_notifier_list(void) { srcu_init_notifier_head(&cpufreq_transition_notifier_list); + init_cpufreq_transition_notifier_list_called = true; return 0; } pure_initcall(init_cpufreq_transition_notifier_list); @@ -1367,6 +1369,8 @@ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list) { int ret; + WARN_ON(!init_cpufreq_transition_notifier_list_called); + switch (list) { case CPUFREQ_TRANSITION_NOTIFIER: ret = srcu_notifier_chain_register( |