kern/{h,s}list: add type declarations to public headers

This change merely documents the types as part of the public interface
of the respective modules.

1 files changed, 4 insertions, 0 deletions

diff --git a/kern/slist.h b/kern/slist.h
index dd6a2d7..c0dcb08 100644
--- a/kern/slist.h
+++ b/kern/slist.h
@@ -28,6 +28,10 @@
 #include <kern/macros.h>
 #include <kern/slist_types.h>
 
+struct slist;
+
+struct slist_node;
+
 /*
  * Static list initializer.
  */