X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftcon%2Ftcon.h;h=e0f84b383976c4d106e6d9fe3ee9043c449d1ed8;hp=1dbadafc9726716e6d19d82794ab22b461ef4903;hb=cd2d09063cdfb0e730e7d3c344c85716d3217028;hpb=0ddea4131eca28437638cdaf9394324fafab33da

diff --git a/ccan/tcon/tcon.h b/ccan/tcon/tcon.h
index 1dbadafc..e0f84b38 100644
--- a/ccan/tcon/tcon.h
+++ b/ccan/tcon/tcon.h
@@ -321,6 +321,8 @@
  * tcon_container_of() evaluates to a pointer to the container
  * structure.  With sufficient compiler support, the pointer will be
  * correctly typed, and the type of @member_ptr will be verified.
+ * Note that const is discarded; a const @member_ptr still yields a
+ * non-const container (unless @canary is const).
  *
  * Returns NULL if @member_ptr is NULL.
  */
@@ -330,7 +332,7 @@
 		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;
 }