Bug 254440

After upgrading 12.2-RELEASE to 13.0-BETA, 'kldload zfs' spins and doesn't come back.

This only happens with VWare and doesn't with 2~3 other hardwares.
Another note is another 13.0-BETA version which has been following since current-13 doesn't hung same way; only upgrade from 12.2-RELEASE among my environment.

I don't have ZFS boot.
I also don't set zfs_enable as I often connect USB disk and mount zfs file systems.

vmare# procstat -kk 1049
   PID    TID COMM                TDNAME              KSTACK                       
  1049 100215 kldload             -                   spa_init+0xc6 zfs_kmod_init+0x1a
 zfs_modevent+0x34 module_register_init+0x8c linker_load_module+0xaab kern_kldload+0xc1
 sys_kldload+0x50 syscall+0x17d g_ctx+0xe280bf29 

vmware# kgdb101 /usr/usr/lib/debug/boot/kernel/zfs.ko.debug
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Reading symbols from zfs.ko.debug...
(kgdb) info line *spa_init+0xc6
Line 2345 of "/usr/src/sys/contrib/openzfs/module/zfs/spa_misc.c"
   starts at address 0x2b0461 <spa_init+193>
   and ends at 0x2b0467 <spa_init+199>.
(kgdb) 

void
spa_init(spa_mode_t mode)
{
        mutex_init(&spa_namespace_lock, NULL, MUTEX_DEFAULT, NULL);
        mutex_init(&spa_spare_lock, NULL, MUTEX_DEFAULT, NULL); // <- line 2345