New issue by emacsomancer on void-packages repository

https://github.com/void-linux/void-packages/issues/12519
Description: ### System

* xuname:  
`Void 4.19.50_1 x86_64 GenuineIntel uptodate rrrmFFFF`
* package:  
`linux-4.19.51`, `linux-4.14.126`, `linux-5.1.10` (and I think `linux-5.1.9`) and both `zfs-0.8.0` and `zfs-0.8.1`.

### Expected behavior
The kernel versions which boot —  including `linux-4.19.50`, `linux-4.14.125` — proceed loading after enabling the ZFS kernel module, and successfully boot, e.g.:

```
.....
[    3.908527] dracut: luksOpen /dev/sda1 cryptz /rootkey.bin luks
[    6.366046] NET: Registered protocol family 38
[   11.486374] spl: loading out-of-tree module taints kernel.
[   11.492145] icp: module license 'CDDL' taints kernel.
[   11.492147] Disabling lock debugging due to kernel taint
[   12.410694] ZFS: Loaded module v0.8.0-1, ZFS pool version 5000, ZFS filesystem version 5
[   12.441836] dracut: ZFS: No sysroot.mount exists or zfs-generator did not extend it.
[   12.441902] dracut: ZFS: Mounting root with the traditional mount-zfs.sh instead.
[   12.457191] dracut: ZFS: Importing pool dozer...
[   13.388974] dracut: ZFS: Mounting dataset dozer/ROOT/system...
[   13.462031] dracut: Mounted root filesystem dozer/ROOT/system
[   13.482632] dracut: ZFS: There is an active pool, will export it.
[   13.530312] dracut: Switching root
[   13.715111] fuse init (API version 7.27)
[   13.742556] raid6: sse2x1   gen()  8789 MB/s
[   13.759555] raid6: sse2x1   xor()  7705 MB/s
[   13.776556] raid6: sse2x2   gen() 12730 MB/s
.....
```

### Actual behavior
All of the newer versions of kernels hang during boot, only proceeding as far as:
```
....
[    3.908527] dracut: luksOpen /dev/sda1 cryptz /rootkey.bin luks
[    6.366046] NET: Registered protocol family 38
[   11.486374] spl: loading out-of-tree module taints kernel.
[   11.492145] icp: module license 'CDDL' taints kernel.
[   11.492147] Disabling lock debugging due to kernel taint
[   12.410694] ZFS: Loaded module v0.8.0-1, ZFS pool version 5000, ZFS filesystem version 5

```
and then hangs indefinitely.


### Steps to reproduce the behavior
Choose one of the newer kernel releases  (e.g. anything more recent than `linux-4.19.50`, `linux-4.14.125`, or (I think) `linux-5.1.8`) in GRUB.