Re: [PATCH] NFS: Fix RCU warnings in nfs_inode_return_delegation_noreclaim() [ver #2]

[David Howells]

Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> wrote:

> OK, just to make sure I understand you...  You are asking for two additional
> RCU API members:
> 
> 1.	rcu_access_pointer() or some such that includes ACCESS_ONCE(),
> 	but not smp_read_barrier_depends(), which may be used when
> 	we are simply examining the value of the RCU-protected pointer
> 	(as in the NFS case).  It could also be used when the
> 	appropriate update-side lock is held, but for that we have:
> 
> 2.	rcu_dereference_protected() or some such that includes neither
> 	ACCESS_ONCE() nor smp_read_barrier_depends(), and that may
> 	only be used if updates are prevented, for example, by holding
> 	the appropriate update-side lock.
> 
> Does this fit?

Yep.  I think so.

David
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