Merge branch 'smc-next'

Ursula Braun says:

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net/smc: patches 2019-02-07

here are patches for SMC:
* patches 1, 3, and 6 are cleanups without functional change
* patch 2 postpones closing of internal clcsock
* patches 4 and 5 improve link group creation locking
* patch 7 restores AF_SMC as diag_family field
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Signed-off-by: David S. Miller <davem@davemloft.net>