Greetings everybody,

Doing a little experiment with docker, I encountered this scary error message:

This QEMU binary requires the membarrier system call.
Please upgrade your system to a newer version of Linux

So I believe the 4.12.y kernel of openSUSE does not have this feature.
Therefore the solution appears to be rebuilding qemu-linux-user with
--disable-membarrier.

relevant part of Dockerfile:
FROM arm32v7/openjdk:8-jre-alpine AS run
COPY qemu-arm qemu-arm-binfmt /usr/bin/
RUN apk add bash bluez libc6-compat iptables

I then rebuilt the qemu-linux-user package with
s/--enable/membarrier/--disable-membarrier/ --> and the resulting binaries
worked fine as expected.

Please consider enabling the membarrier syscall in the kernel, or disable the
feature in qemu builds for leap 15.1.