Looks like: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/arch/arm64/include/asm/xen/page-coherent.h?id=702e8ed37bed9b39e1d323511e0038444dd569b8 is causing a build breakage in -next: https://travis-ci.com/ClangBuiltLinux/continuous-integration/jobs/172324829 -- Thanks, ~Nick Desaulniers
