Question on vhost_has_feature()

[Paul E. McKenney]

Hello, Michael,

Just curious about the purpose of the rcu_dereference_index_check() in
vhost_has_feature().  I don't see how it fits in.  The closest thing
I see if the use in handle_rx(), where it selects vq->log or NULL.  But
in that case, I would expect the usual RCU usage pattern to wrap an
rcu_dereference() around the vq->log.

Enlightenment?

							Thanx, Paul

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