[PATCH] block-mq:Fix the null memory access while setting tags cpumask

[Jeff Moyer]

Raghavendra K T <raghavendra.kt at linux.vnet.ibm.com> writes:

> In nr_hw_queues >1 cases when certain number of cpus are onlined/or
> offlined, that results change in request_queue map in block-mq layer,
> we see the kernel dumping like:

What version is that patch against?  This problem should be fixed by the
patch set from Akinobu Mita.  I tested cpu hot-plugging on my system
with an nvme device, and it is fixed there on mainline.

Cheers,
Jeff