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-rw-r--r--commit-slab.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/commit-slab.h b/commit-slab.h
index 69bf0c807c..05b3f2804e 100644
--- a/commit-slab.h
+++ b/commit-slab.h
@@ -24,7 +24,12 @@
* - int *indegree_peek(struct indegree *, struct commit *);
*
* This function is similar to indegree_at(), but it will return NULL
- * until a call to indegree_at() was made for the commit.
+ * if the location to store the data associated with the given commit
+ * has not been allocated yet.
+ * Note that the location to store the data might have already been
+ * allocated even if no indegree_at() call has been made for that commit
+ * yet; in this case this function returns a pointer to a
+ * zero-initialized location.
*
* - void init_indegree(struct indegree *);
* void init_indegree_with_stride(struct indegree *, int);