diff --git a/drivers/isdn/capi/kcapi_proc.c b/drivers/isdn/capi/kcapi_proc.c
index c29208bd752131e9d8406c193a48f2a5982df272..50ed778f63fc84cd3c31da19a15b1f6bd60f5754 100644
--- a/drivers/isdn/capi/kcapi_proc.c
+++ b/drivers/isdn/capi/kcapi_proc.c
@@ -239,6 +239,7 @@ static const struct file_operations proc_applstats_ops = {
 // ---------------------------------------------------------------------------
 
 static void *capi_driver_start(struct seq_file *seq, loff_t *pos)
+	__acquires(&capi_drivers_list_lock)
 {
 	read_lock(&capi_drivers_list_lock);
 	return seq_list_start(&capi_drivers, *pos);
@@ -250,6 +251,7 @@ static void *capi_driver_next(struct seq_file *seq, void *v, loff_t *pos)
 }
 
 static void capi_driver_stop(struct seq_file *seq, void *v)
+	__releases(&capi_drivers_list_lock)
 {
 	read_unlock(&capi_drivers_list_lock);
 }