Re: [B.A.T.M.A.N.] [PATCH] Re: batman-adv: Correct rcu refcounting for gw_node

Linus Lüssing wrote:

...

I think it should look that way:

...

•   struct gw_node *curr_gw;
  

•   struct gw_node __rcu *curr_gw;
  

Eh, had been looking at whatisRCU.txt and there gbl_foo in section 3 did not have a "__rcu" (actually I hadn't seen that in any of the documentations before).

$ git show v2.6.37:Documentation/RCU/checklist.txt|grep __rcu

That document explains it quite well how the sparse check works and why you must use __rcu to say "hey, this is a pointer which is used in a special way).

Best regards, Sven