ZFS works on 8.99.34 but fails on 201905260520Z

[Petr Topiarz <petr%topiarz.cz@localhost>]

Hi Tech-kern,

I run two machines with NetBSD amd64 with ZFS, one is with 8.99.34 
kernel from february,

the other is the latest today, 201905260520Z,

It all runs fine with the first one, but as I upgraded the other, ZFS 
does not load and tels me:

modload: zfs: Exec format error

and to /var/log messages it writes:

May 28 18:55:46 poweredge /netbsd: [ 236.3881944] kobj_checksyms, 988: 
[zfs]: linker error: symbol `disk_rename' not found
May 28 18:55:46 poweredge /netbsd: [ 236.4833169] WARNING: module error: 
unable to affix module `zfs', error 8
May 28 18:55:50 poweredge /netbsd: [ 240.2655954] kobj_checksyms, 988: 
[zfs]: linker error: symbol `disk_rename' not found
May 28 18:55:50 poweredge /netbsd: [ 240.3599823] WARNING: module error: 
unable to affix module `zfs', error 8
May 28 18:56:18 poweredge /netbsd: [ 268.0810981] kobj_checksyms, 988: 
[zfs]: linker error: symbol `disk_rename' not found
May 28 18:56:18 poweredge /netbsd: [ 268.1715047] WARNING: module error: 
unable to affix module `zfs', error 8

considering configuration I got:

cat /etc/modules.conf
solaris
zfs

and in /etc/rc.conf I got

modules=YES

Any hint where to look or what to reconfigure in the kernel? I am using 
standard netbsd kernel in both cases.

thanks

Petr