Re: [PATCH 31/36] security,rcu: convert call_rcu(user_update_rcu_disposal) to kfree_rcu()

[David Howells]

David Howells <dhowells@xxxxxxxxxx> wrote:

> > The rcu callback user_update_rcu_disposal() just calls a kfree(),
> > so we use kfree_rcu() instead of the call_rcu(user_update_rcu_disposal).
> > 
> > Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
> 
> Nice idea, but how do you handle the container_of()?

Actually, you simply assume that the rcu_head is at the front of the struct,
right?  If you do that, you should alter the comment on struct
user_key_payload in keys/user-type.h to note that this must be at the front.

David
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