Messages in this thread |  | | From | David Howells <> | Subject | Re: [PATCH] Use proper lock in fscache_objlist_config. | Date | Tue, 04 Oct 2016 16:43:31 +0100 |
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Artem Savkov <asavkov@redhat.com> wrote:
> fscache_objlist_config doesn't hold rkey->sem when calling user_key_payload, > that can result in a "suspicious RCU usage" warning. It does hold > rcu_read_lock, so it either needs to use unprotected rcu_dereference, > or take rkey->sem instead of rcu_read_lock.
It shouldn't take key->sem. The RCU lock should be necessary as user_key_payload() wraps a call to rcu_dereference().
Did you encounter a lockdep report or did you visually inspect this?
David
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