1 files changed, 4 insertions, 0 deletions
diff --git a/commit.h b/commit.h
index 42728c2..a3f2b2e 100644
--- a/commit.h
+++ b/commit.h
@@ -257,6 +257,10 @@ extern void setup_alternate_shallow(struct lock_file *shallow_lock,
 extern const char *setup_temporary_shallow(const struct oid_array *extra);
 extern void advertise_shallow_grafts(int);
 
+/*
+ * Initialize with prepare_shallow_info() or zero-initialize (equivalent to
+ * prepare_shallow_info with a NULL oid_array).
+ */
 struct shallow_info {
 	struct oid_array *shallow;
 	int *ours, nr_ours;