perlio.c: Add comment

1 files changed, 2 insertions, 0 deletions

diff --git a/perlio.c b/perlio.c
index cf43c40668..f2803a4025 100644
--- a/perlio.c
+++ b/perlio.c
@@ -5123,6 +5123,8 @@ Perl_PerlIO_restore_errno(pTHX_ PerlIO *f)
 const char *
 Perl_PerlIO_context_layers(pTHX_ const char *mode)
 {
+    /* Returns the layers set by "use open" */
+
     const char *direction = NULL;
     SV *layers;
     /*