nr_freq_lock 4381 kernel/events/core.c static DEFINE_SPINLOCK(nr_freq_lock); nr_freq_lock 4387 kernel/events/core.c spin_lock(&nr_freq_lock); nr_freq_lock 4390 kernel/events/core.c spin_unlock(&nr_freq_lock); nr_freq_lock 10335 kernel/events/core.c spin_lock(&nr_freq_lock); nr_freq_lock 10338 kernel/events/core.c spin_unlock(&nr_freq_lock);