* src/inotify.c (add_watch): Add comment.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/inotify.c b/src/inotify.c
index a0a89aa0f41..290701349ef 100644
--- a/src/inotify.c
+++ b/src/inotify.c
@@ -227,6 +227,9 @@ add_watch (int wd, Lisp_Object filename,
         emacs_abort ();
     }
 
+  /* Insert the newly-assigned ID into the previously-discovered gap,
+     which is possibly at the end of the list.  Inserting it there
+     keeps the list sorted.  */
   watch_id = make_number (id);
   watch = list4 (watch_id, filename, callback, mask);
   XSETCDR (tail, Fcons (watch, XCDR (tail)));