kernel: Remove 4.16.x as it is EOLed

The previous commit updated to 4.16.18, which is the last
4.16.x kernel. The 4.16.18 kernel was compiled and pushed
but we may as well now remove it as it has been EOLed.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

kernel/Makefile

@@ -219,7 +219,6 @@ endef
 #
 ifeq ($(ARCH),x86_64)
 $(eval $(call kernel,4.17.3,4.17.x,$(EXTRA),$(DEBUG)))
-$(eval $(call kernel,4.16.18,4.16.x,$(EXTRA),$(DEBUG)))
 $(eval $(call kernel,4.14.52,4.14.x,$(EXTRA),$(DEBUG)))
 $(eval $(call kernel,4.14.52,4.14.x,,-dbg))
 $(eval $(call kernel,4.14.40,4.14.x,-rt,))

test/cases/020_kernel/008_config_4.16.x/test.sh

@@ -1,24 +0,0 @@
-#!/bin/sh
-# SUMMARY: Sanity check on the kernel config file
-# LABELS:
-# REPEAT:
-
-set -e
-
-# Source libraries. Uncomment if needed/defined
-#. "${RT_LIB}"
-. "${RT_PROJECT_ROOT}/_lib/lib.sh"
-
-NAME=kconfig
-
-clean_up() {
-	rm -rf ${NAME}-*
-}
-trap clean_up EXIT
-
-# Test code goes here
-linuxkit build -format kernel+initrd -name "${NAME}" test.yml
-RESULT="$(linuxkit run ${NAME})"
-echo "${RESULT}" | grep -q "suite PASSED"
-
-exit 0

test/cases/020_kernel/008_config_4.16.x/test.yml

@@ -1,15 +0,0 @@
-kernel:
-  image: linuxkit/kernel:4.16.17
-  cmdline: "console=ttyS0 console=ttyAMA0"
-init:
-  - linuxkit/init:923355a5ed75f40ee394741829d42bf4b78cce46
-  - linuxkit/runc:v0.4
-onboot:
-  - name: check-kernel-config
-    image: linuxkit/test-kernel-config:a62a6a7ed9ad857c3e1a5a265f3a2e9f6ab1d643
-  - name: poweroff
-    image: linuxkit/poweroff:d75d94d9603bde9ab95b914deed0d069d05d8b20
-    command: ["/bin/sh", "/poweroff.sh", "3"]
-trust:
-  org:
-    - linuxkit

test/cases/020_kernel/018_kmod_4.16.x/Dockerfile

@@ -1,23 +0,0 @@
-# This Dockerfile extracts the kernel headers from the kernel image
-# and then compiles a simple hello world kernel module against them.
-# In the last stage, it creates a package, which can be used for
-# testing.
-
-FROM linuxkit/kernel:4.16.17 AS ksrc
-
-# Extract headers and compile module
-FROM linuxkit/alpine:f3cd219615428b2bd943411723eb28875275fae7 AS build
-RUN apk add build-base libelf-dev
-
-COPY --from=ksrc /kernel-dev.tar /
-RUN tar xf kernel-dev.tar
-
-WORKDIR /kmod
-COPY ./src/* ./
-RUN make all
-
-# Package
-FROM alpine:3.7
-COPY --from=build /kmod/hello_world.ko /
-COPY check.sh /check.sh
-ENTRYPOINT ["/bin/sh", "/check.sh"]

test/cases/020_kernel/018_kmod_4.16.x/check.sh

@@ -1,15 +0,0 @@
-#!/bin/sh
-function failed {
-	printf "Kernel module test suite FAILED\n"
-	/sbin/poweroff -f
-}
-
-uname -a
-modinfo hello_world.ko || failed
-insmod hello_world.ko || failed
-[ -n "$(dmesg | grep -o 'Hello LinuxKit')" ] || failed
-rmmod hello_world || failed
-
-printf "Kernel module test suite PASSED\n"
-
-/sbin/poweroff -f

test/cases/020_kernel/018_kmod_4.16.x/src/Makefile

@@ -1,6 +0,0 @@
-obj-m += hello_world.o
-KVER=$(shell basename /usr/src/linux-headers-*)
-all:
-	make -C /usr/src/$(KVER) M=$(PWD) modules
-clean:
-	make -C /usr/src/$(KVER) M=$(PWD) clean

test/cases/020_kernel/018_kmod_4.16.x/src/hello_world.c

@@ -1,22 +0,0 @@
-/*  
- * A simple Hello World kernel module 
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-
-int init_hello(void)
-{
-	printk(KERN_INFO "Hello LinuxKit\n");
-	return 0;
-}
-
-void exit_hello(void)
-{
-	printk(KERN_INFO "Goodbye LinuxKit.\n");
-}
-
-module_init(init_hello);
-module_exit(exit_hello);
-MODULE_AUTHOR("Rolf Neugebauer <rolf.neugebauer@docker.com>");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("A simple Hello World kernel module for testing");

test/cases/020_kernel/018_kmod_4.16.x/test.sh

@@ -1,31 +0,0 @@
-#!/bin/sh
-# SUMMARY: Test build and insertion of kernel modules
-# LABELS:
-# REPEAT:
-
-set -e
-
-# Source libraries. Uncomment if needed/defined
-#. "${RT_LIB}"
-. "${RT_PROJECT_ROOT}/_lib/lib.sh"
-
-NAME=kmod
-IMAGE_NAME=kmod-test
-
-clean_up() {
-	docker rmi ${IMAGE_NAME} || true
-	rm -rf ${NAME}-*
-}
-trap clean_up EXIT
-
-# Make sure we have the latest kernel image
-docker pull linuxkit/kernel:4.16.17
-# Build a package
-docker build -t ${IMAGE_NAME} .
-
-# Build and run a LinuxKit image with kernel module (and test script)
-linuxkit build -format kernel+initrd -name "${NAME}" test.yml
-RESULT="$(linuxkit run ${NAME})"
-echo "${RESULT}" | grep -q "Hello LinuxKit"
-
-exit 0

test/cases/020_kernel/018_kmod_4.16.x/test.yml

@@ -1,20 +0,0 @@
-kernel:
-  image: linuxkit/kernel:4.16.17
-  cmdline: "console=ttyS0 console=ttyAMA0"
-init:
-  - linuxkit/init:923355a5ed75f40ee394741829d42bf4b78cce46
-  - linuxkit/runc:v0.4
-onboot:
-  - name: check
-    image: kmod-test
-    binds:
-     - /dev:/dev
-     - /lib/modules:/lib/modules
-    capabilities:
-     - all
-  - name: poweroff
-    image: linuxkit/poweroff:d75d94d9603bde9ab95b914deed0d069d05d8b20
-    command: ["/bin/sh", "/poweroff.sh", "3"]
-trust:
-  org:
-    - linuxkit