Revert "Kernel: T2843: upgrade Kernel to v5.8.5"

This reverts commit 78c43c2078e292ac9b53d2d6a41a47466d283914.

Unfortunately we must revert the Kernel upgrade as there are two problematic
issues. One which is the break of ABI functionality with parted [1] and second
the internal cryptop API [2] which removed required literals for the build of
Intel QAT acceleration.

In the two weeks running 5.8 we still learned a lot - we experienced a
performance improvement of ~30% when doing NAT @ > 10GBit/s and also utilizing
the build in updated drivers for Intel NICs and WireGuard.

We are looking forward to the release of this years LTS kernel and we hope to
ship this in the final 1.3 release.

1: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.8.y&id=692d062655
2: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.5.y&id=d63007eb95

1 files changed, 56 insertions, 2 deletions

diff --git a/packages/linux-kernel/Jenkinsfile b/packages/linux-kernel/Jenkinsfile
index 09771a5..908a302 100644
--- a/packages/linux-kernel/Jenkinsfile
+++ b/packages/linux-kernel/Jenkinsfile
@@ -22,7 +22,7 @@
 
 /* Only keep the most recent builds. */
 def projectProperties = [
-    [$class: 'BuildDiscarderProperty',strategy: [$class: 'LogRotator', numToKeepStr: '20']],
+    [$class: 'BuildDiscarderProperty',strategy: [$class: 'LogRotator', numToKeepStr: '1']],
 ]
 
 properties(projectProperties)
@@ -92,7 +92,7 @@ pipeline {
                                 doGenerateSubmoduleConfigurations: false,
                                 extensions: [[$class: 'CleanCheckout'],
                                              [$class: 'CloneOption', depth: 1, noTags: false, reference: '', shallow: true]],
-                                branches: [[name: 'v5.8.8' ]],
+                                branches: [[name: 'v4.19.142' ]],
                                 userRemoteConfigs: [[credentialsId: 'GitHub-vyosbot', url: 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git']]])
                         }
                     }
@@ -118,6 +118,26 @@ pipeline {
                         }
                     }
                 }
+                stage('WireGuard') {
+                    when {
+                        beforeOptions true
+                        beforeAgent true
+                        anyOf {
+                            changeset pattern: "${env.CHANGESET_DIR}"
+                            triggeredBy 'TimerTrigger'
+                            triggeredBy cause: "UserIdCause"
+                        }
+                    }
+                    steps {
+                        dir(env.BASE_DIR + '/wireguard-linux-compat') {
+                            checkout([$class: 'GitSCM',
+                                doGenerateSubmoduleConfigurations: false,
+                                extensions: [[$class: 'CleanCheckout']],
+                                branches: [[name: 'debian/1.0.20200712-1_bpo10+1' ]],
+                                userRemoteConfigs: [[credentialsId: 'GitHub-vyosbot', url: 'https://salsa.debian.org/debian/wireguard-linux-compat.git']]])
+                        }
+                    }
+                }
                 stage('Accel-PPP') {
                     when {
                         beforeOptions true
@@ -159,6 +179,24 @@ pipeline {
 
         stage('Kernel Module(s)') {
             parallel {
+                stage('WireGuard') {
+                    when {
+                        beforeOptions true
+                        beforeAgent true
+                        anyOf {
+                            changeset pattern: "${env.CHANGESET_DIR}"
+                            triggeredBy 'TimerTrigger'
+                            triggeredBy cause: "UserIdCause"
+                        }
+                    }
+                    steps {
+                        dir(env.BASE_DIR) {
+                            // In Debian wireguard repo commit edb7124c866ea0e506278c311fc82dfde1f957be
+                            // they decided to split source code of the kernel part and tools
+                            sh "./build-wireguard-modules.sh"
+                        }
+                    }
+                }
                 stage('Accel-PPP') {
                     when {
                         beforeOptions true
@@ -175,6 +213,22 @@ pipeline {
                         }
                     }
                 }
+                stage('Intel Driver(s)') {
+                    when {
+                        beforeOptions true
+                        beforeAgent true
+                        anyOf {
+                            changeset pattern: "${env.CHANGESET_DIR}"
+                            triggeredBy 'TimerTrigger'
+                            triggeredBy cause: "UserIdCause"
+                        }
+                    }
+                    steps {
+                        dir(env.BASE_DIR) {
+                            sh "./build-intel-drivers.sh"
+                        }
+                    }
+                }
                 stage('Intel QuickAssist Technology') {
                     when {
                         beforeOptions true