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-rw-r--r--src/lib/ctime/di_ops.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/lib/ctime/di_ops.c b/src/lib/ctime/di_ops.c
index 011baf2654..73441f84f8 100644
--- a/src/lib/ctime/di_ops.c
+++ b/src/lib/ctime/di_ops.c
@@ -23,6 +23,9 @@
* This implementation differs from memcmp in that its timing behavior is not
* data-dependent: it should return in the same amount of time regardless of
* the contents of <b>a</b> and <b>b</b>.
+ *
+ * Note that if all you care about is equality, this implementation is
+ * overkill: it would be better to use tor_memeq() or tor_memneq().
*/
int
tor_memcmp(const void *a, const void *b, size_t len)