Kernel 4.14 fails to build with GCC 8 on powerpc64, due to 'in' being
uninitialised in epapr_hypercall*.
This is fixed in commit 186b8f1587c79c2fa04bfa392fdf08 upstream, and
this commit applies cleanly to the 4.14 tree. This commit is already on
the 4.19 branch.
A. Wilcox (awilfox)
Project Lead, Adélie Linux