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    SubjectRe: [PATCH tip/urgent] rcu: add rcu_access_pointer and rcu_dereference_protected
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    Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:

    > The new rcu_access_pointer() primitive is for the case where the pointer
    > is be fetch and not dereferenced. This primitive may be used without
    > protection, RCU or otherwise, due to the fact that it uses ACCESS_ONCE().
    > ...
    > +#define rcu_access_pointer(p, c) \

    NAK. This shouldn't have the conditional parameter 'c'. Given that 'c' (by
    analogy to rcu_dereference_check()) is there to describe the conditions under
    which it's permitted to dereference the pointer, why is that relevant here?
    What is it you're proving?

    David


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