Re: fix rcu annotations noise in cred.h
From: Paul E. McKenney
Date: Mon Aug 08 2011 - 08:34:49 EST
On Mon, Aug 08, 2011 at 09:18:29AM +0100, David Howells wrote:
> Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
> > #define current_cred() \
> > - (current->cred)
> > + (*(__force struct cred **)¤t->cred)
> No. You've cast away the const. Please don't do that.
> Paul: isn't there some better way of doing this using an RCU wrapper macro?
> #define current_cred() \
> rcu_dereference_protected(current->cred, 1)
This is indeed what rcu_dereference_protected() is intended for.
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