NUM_CPU_FTR_KEYS
extern struct static_key_true cpu_feature_keys[NUM_CPU_FTR_KEYS];
struct static_key_true cpu_feature_keys[NUM_CPU_FTR_KEYS] = {
[0 ... NUM_CPU_FTR_KEYS - 1] = STATIC_KEY_TRUE_INIT
for (i = 0; i < NUM_CPU_FTR_KEYS; i++) {