diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index 0f17b1c32718e..1d00a73fb5181 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -595,6 +595,7 @@ bool __weak cpc_supported_by_cpu(void)
 
 /**
  * pcc_data_alloc() - Allocate the pcc_data memory for pcc subspace
+ * @pcc_ss_id: PCC Subspace index as in the PCC client ACPI package.
  *
  * Check and allocate the cppc_pcc_data memory.
  * In some processor configurations it is possible that same subspace
@@ -1536,6 +1537,7 @@ EXPORT_SYMBOL_GPL(cppc_set_perf);
 
 /**
  * cppc_get_transition_latency - returns frequency transition latency in ns
+ * @cpu_num: CPU number for per_cpu().
  *
  * ACPI CPPC does not explicitly specify how a platform can specify the
  * transition latency for performance change requests. The closest we have