Zoned block device regression test 11

[Bart Van Assche <bvanassche@xxxxxxx>]

Hello Michael,

If I run the fio code from https://github.com/bvanassche/fio against 
Linux kernel v4.18 as follows:

./fio/t/zbd/run-tests-against-zoned-nullb

then all tests except test number 11 pass. If I revert your axmap 
patches however then test 11 passes. I think this means that your axmap 
patches introduced a regression in the axmap code. Can you have a look 
at this?

Thanks,

Bart.