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To allow LLD to do lookups on rports without grabbing a mutex, make them RCU-safe. The caller of lport->tt.rport_lookup will have the choice of holding disc_mutex or the rcu_read_lock(). Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>