sysctl weirdness on m68k

On NetBSD/atari, luna68k and x68k, kernels print the following
sysctl_createv errors during boot:

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NetBSD 6.99.49 (ATARITT) #243: Sat Jul 26 21:45:00 JST 2014
        tsutsui@mirage:/usr/src/sys/arch/atari/compile/ATARITT
Atari TT (m68030 CPU/MMU mc68882 FPU)
total memory = 69632 KB
avail memory = 64744 KB
sysctl_createv: sysctl_locate(multicast) returned 2
sysctl_createv: sysctl_locate(multicast_kludge) returned 2
mainbus0 (root)
 :

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NetBSD 6.99.49 (GENERIC) #214: Sat Jul 26 21:42:32 JST 2014
        tsutsui@mirage:/usr/src/sys/arch/luna68k/compile/GENERIC
LUNA-II (MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches)
total memory = 65536 KB
avail memory = 60700 KB
sysctl_createv: sysctl_locate(multicast) returned 2
sysctl_createv: sysctl_locate(multicast_kludge) returned 2
mainbus0 (root)
 :

---
NetBSD 6.99.49 (GENERIC) #211: Sun Jul 27 00:13:08 JST 2014
        tsutsui@mirage:/usr/src/sys/arch/x68k/compile/GENERIC
X68030 (m68030 CPU/MMU, m68881 FPU, 24MHz clock) on XM6i v0.44
total memory = 140 MB
avail memory = 133 MB
sysctl_createv: sysctl_locate(multicast) returned 2
sysctl_createv: sysctl_locate(multicast_kludge) returned 2
mainbus0 (root)
 :

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Is there anyone who also sees these
"sysctl_createv: sysctl_locate(multicast) returned 2"
messages on other ports?

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Izumi Tsutsui