Bug#923173: Fwd: Bug#923173: Acknowledgement (linux-image-4.9.0-8-amd64: Kernel Panic, HALT when detach-ing bcache)

[Henrie Cuijpers]

I tested this for a few older kernels:

linux-image-4.9.0-8-amd64: kernel panic
linux-image-4.9.0-7-amd64: kernel panic
linux-image-4.9.0-6-amd64: works fine
linux-image-4.9.0-5-amd64: not tested
linux-image-4.9.0-4-amd64: works fine