kernel: Remove support for v5.3.x kernels

Signed-off-by: Rolf Neugebauer <rn@rneugeba.io>

kernel/Makefile

@@ -253,7 +253,6 @@ endef
 #
 ifeq ($(ARCH),x86_64)
 $(eval $(call kernel,5.4.4,5.4.x,$(EXTRA),$(DEBUG)))
-$(eval $(call kernel,5.3.17,5.3.x,$(EXTRA),$(DEBUG)))
 $(eval $(call kernel,4.19.90,4.19.x,$(EXTRA),$(DEBUG)))
 $(eval $(call kernel,4.19.90,4.19.x,,-dbg))
 $(eval $(call kernel,4.19.59,4.19.x,-rt,))

kernel/patches-5.3.x/0001-include-uapi-linux-swab-Fix-potentially-missing-__al.patch

@@ -1,55 +0,0 @@
-From b0d01878810994958fccb117030fefb250f9f949 Mon Sep 17 00:00:00 2001
-From: Matt Redfearn <matt.redfearn@mips.com>
-Date: Wed, 3 Jan 2018 09:57:30 +0000
-Subject: [PATCH] include/uapi/linux/swab: Fix potentially missing
- __always_inline
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Commit bc27fb68aaad ("include/uapi/linux/byteorder, swab: force inlining
-of some byteswap operations") added __always_inline to swab functions
-and commit 283d75737837 ("uapi/linux/stddef.h: Provide __always_inline to
-userspace headers") added a definition of __always_inline for use in
-exported headers when the kernel's compiler.h is not available.
-
-However, since swab.h does not include stddef.h, if the header soup does
-not indirectly include it, the definition of __always_inline is missing,
-resulting in a compilation failure, which was observed compiling the
-perf tool using exported headers containing this commit:
-
-In file included from /usr/include/linux/byteorder/little_endian.h:12:0,
-                 from /usr/include/asm/byteorder.h:14,
-                 from tools/include/uapi/linux/perf_event.h:20,
-                 from perf.h:8,
-                 from builtin-bench.c:18:
-/usr/include/linux/swab.h:160:8: error: unknown type name ‘__always_inline’
- static __always_inline __u16 __swab16p(const __u16 *p)
-
-Fix this by replacing the inclusion of linux/compiler.h with
-linux/stddef.h to ensure that we pick up that definition if required,
-without relying on it's indirect inclusion. compiler.h is then included
-indirectly, via stddef.h.
-
-Fixes: 283d75737837 ("uapi/linux/stddef.h: Provide __always_inline to userspace headers")
-Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
----
- include/uapi/linux/swab.h | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/include/uapi/linux/swab.h b/include/uapi/linux/swab.h
-index 23cd84868cc3..f6a8cf737abf 100644
---- a/include/uapi/linux/swab.h
-+++ b/include/uapi/linux/swab.h
-@@ -3,7 +3,7 @@
- #define _UAPI_LINUX_SWAB_H
- 
- #include <linux/types.h>
--#include <linux/compiler.h>
-+#include <linux/stddef.h>
- #include <asm/swab.h>
- 
- /*
--- 
-2.24.0
-

test/cases/020_kernel/010_config_5.3.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/010_config_5.3.x/test.yml

@@ -1,15 +0,0 @@
-kernel:
-  image: linuxkit/kernel:5.3.17
-  cmdline: "console=ttyS0 console=ttyAMA0"
-init:
-  - linuxkit/init:a4fcf333298f644dfac6adf680b83140927aa85e
-  - linuxkit/runc:69b4a35eaa22eba4990ee52cccc8f48f6c08ed03
-onboot:
-  - name: check-kernel-config
-    image: linuxkit/test-kernel-config:94fdeb494e09200fc05b6da39822aabfaca234e4
-  - name: poweroff
-    image: linuxkit/poweroff:b498d30dd9660090565537fceb9e757618737a85
-    command: ["/bin/sh", "/poweroff.sh", "3"]
-trust:
-  org:
-    - linuxkit

test/cases/020_kernel/110_kmod_5.3.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:5.3.17 AS ksrc
-
-# Extract headers and compile module
-FROM linuxkit/alpine:3fdc49366257e53276c6f363956a4353f95d9a81 AS build
-RUN apk add build-base elfutils-dev
-
-COPY --from=ksrc /kernel-dev.tar /
-RUN tar xf kernel-dev.tar
-
-WORKDIR /kmod
-COPY ./src/* ./
-RUN make all
-
-# Package
-FROM alpine:3.9
-COPY --from=build /kmod/hello_world.ko /
-COPY check.sh /check.sh
-ENTRYPOINT ["/bin/sh", "/check.sh"]

test/cases/020_kernel/110_kmod_5.3.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/110_kmod_5.3.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/110_kmod_5.3.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/110_kmod_5.3.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:5.3.17
-# 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/110_kmod_5.3.x/test.yml

@@ -1,20 +0,0 @@
-kernel:
-  image: linuxkit/kernel:5.3.17
-  cmdline: "console=ttyS0 console=ttyAMA0"
-init:
-  - linuxkit/init:a4fcf333298f644dfac6adf680b83140927aa85e
-  - linuxkit/runc:69b4a35eaa22eba4990ee52cccc8f48f6c08ed03
-onboot:
-  - name: check
-    image: kmod-test
-    binds:
-     - /dev:/dev
-     - /lib/modules:/lib/modules
-    capabilities:
-     - all
-  - name: poweroff
-    image: linuxkit/poweroff:b498d30dd9660090565537fceb9e757618737a85
-    command: ["/bin/sh", "/poweroff.sh", "3"]
-trust:
-  org:
-    - linuxkit