tcon: avoid error 'expected `void *` but argument is of type `const void *`' in tcon_...

[ccan] / ccan / tcon / tcon.h

diff --git a/ccan/tcon/tcon.h b/ccan/tcon/tcon.h
index 1dbadafc9726716e6d19d82794ab22b461ef4903..247a7331c8b98aa52c7da44750b6db0c02c6c872 100644 (file)
--- a/ccan/tcon/tcon.h
+++ b/ccan/tcon/tcon.h
@@ -330,7 +330,7 @@
                canary, tcon_container_of_((member_ptr),                \
                                           tcon_offset((x), canary)))
 
-static inline void *tcon_container_of_(void *member_ptr, size_t offset)
+static inline void *tcon_container_of_(const void *member_ptr, size_t offset)
 {
        return member_ptr ? (char *)member_ptr - offset : NULL;
 }