TRACING_MAP_KEYS_MAX
if (WARN_ON(hist_data->n_keys > TRACING_MAP_KEYS_MAX))
for (i = n_vals; i < n_vals + TRACING_MAP_KEYS_MAX; i++) {
for (i = 0; i < TRACING_MAP_KEYS_MAX; i++)
#define TRACING_MAP_FIELDS_MAX (TRACING_MAP_KEYS_MAX + \
int key_idx[TRACING_MAP_KEYS_MAX];