Andrew Morton <akpm(a)linux-foundation.org> writes:
On Mon, 1 Jul 2019 19:10:38 +0530 "Aneesh Kumar K.V"
> Architectures like powerpc use different address range to map ioremap
> and vmalloc range. The memunmap() check used by the nvdimm layer was
> wrongly using is_vmalloc_addr() to check for ioremap range which fails for
> ppc64. This result in ppc64 not freeing the ioremap mapping. The side effect
> of this is an unbind failure during module unload with papr_scm nvdimm driver
The patch applies to 5.1. Does it need a Fixes: and a Cc:stable?
Actually, we want it to be backported to an older kernel possibly one
that added papr-scm driver, b5beae5e224f ("powerpc/pseries: Add driver
for PAPR SCM regions"). But that doesn't apply easily. It does apply
without conflicts to 5.0