On Mon, 10 Jul 2023 02:17:01 +0000 Nadav Amit namit@vmware.com wrote:

...

On Jul 9, 2023, at 6:54 PM, Steven Rostedt rostedt@goodmis.org wrote:

•   union {
  

•           struct rcu_head         rcu;
  

•           struct llist_node       llist;  /* For freeing after RCU */
  

•   };  
  

The memory savings from using a union might not be worth the potential impact of type confusion and bugs.

It's also documentation. The two are related, as one is the hand off to the other. It's not a random union, and I'd like to leave it that way.

-- Steve