From 53a9cc2c1dfa5670e7f646f8e72684b88c3ee4b7 Mon Sep 17 00:00:00 2001
From: Johan Gunnarsson <johan.gunnarsson@gmail.com>
Date: Tue, 25 Jul 2023 19:47:59 +0200
Subject: [PATCH] Reduce initramfs size

This will reduce compressed initramfs size on Ubuntu from 89 MB to
28 MB.
---
 .../etc/initramfs-tools/conf.d/modules.conf   |  1 +
 .../initramfs-tools/conf.d/compression.conf   |  2 ++
 .../etc/initramfs-tools/conf.d/modules.conf   |  1 +
 .../etc/initramfs-tools/hooks/storage         | 24 +++++++++++++++++++
 .../initramfs-tools/conf.d/compression.conf   |  2 ++
 .../etc/initramfs-tools/conf.d/modules.conf   |  1 +
 .../etc/initramfs-tools/hooks/storage         | 24 +++++++++++++++++++
 7 files changed, 55 insertions(+)
 create mode 100644 2nd-stage-files/post-2nd-stage-files/etc/initramfs-tools/conf.d/modules.conf
 create mode 100644 2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/conf.d/compression.conf
 create mode 100644 2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/conf.d/modules.conf
 create mode 100755 2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/hooks/storage
 create mode 100644 2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/conf.d/compression.conf
 create mode 100644 2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/conf.d/modules.conf
 create mode 100755 2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/hooks/storage

diff --git a/2nd-stage-files/post-2nd-stage-files/etc/initramfs-tools/conf.d/modules.conf b/2nd-stage-files/post-2nd-stage-files/etc/initramfs-tools/conf.d/modules.conf
new file mode 100644
index 0000000..a47d7de
--- /dev/null
+++ b/2nd-stage-files/post-2nd-stage-files/etc/initramfs-tools/conf.d/modules.conf
@@ -0,0 +1 @@
+MODULES=dep
diff --git a/2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/conf.d/compression.conf b/2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/conf.d/compression.conf
new file mode 100644
index 0000000..1793c9a
--- /dev/null
+++ b/2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/conf.d/compression.conf
@@ -0,0 +1,2 @@
+COMPRESS=gzip
+COMPRESSLEVEL=9
diff --git a/2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/conf.d/modules.conf b/2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/conf.d/modules.conf
new file mode 100644
index 0000000..a724f56
--- /dev/null
+++ b/2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/conf.d/modules.conf
@@ -0,0 +1 @@
+MODULES=list
diff --git a/2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/hooks/storage b/2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/hooks/storage
new file mode 100755
index 0000000..e7e7ffe
--- /dev/null
+++ b/2nd-stage-files/pre-2nd-stage-files-arm64/etc/initramfs-tools/hooks/storage
@@ -0,0 +1,24 @@
+#!/bin/sh -e
+
+PREREQ=""
+
+# Output pre-requisites
+prereqs()
+{
+        echo "$PREREQ"
+}
+
+case "$1" in
+    prereqs)
+        prereqs
+        exit 0
+        ;;
+esac
+
+. /usr/share/initramfs-tools/hook-functions
+
+auto_add_modules base
+auto_add_modules block
+auto_add_modules mmc
+
+manual_add_modules ext4
diff --git a/2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/conf.d/compression.conf b/2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/conf.d/compression.conf
new file mode 100644
index 0000000..1793c9a
--- /dev/null
+++ b/2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/conf.d/compression.conf
@@ -0,0 +1,2 @@
+COMPRESS=gzip
+COMPRESSLEVEL=9
diff --git a/2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/conf.d/modules.conf b/2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/conf.d/modules.conf
new file mode 100644
index 0000000..a724f56
--- /dev/null
+++ b/2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/conf.d/modules.conf
@@ -0,0 +1 @@
+MODULES=list
diff --git a/2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/hooks/storage b/2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/hooks/storage
new file mode 100755
index 0000000..e7e7ffe
--- /dev/null
+++ b/2nd-stage-files/pre-2nd-stage-files-armhf/etc/initramfs-tools/hooks/storage
@@ -0,0 +1,24 @@
+#!/bin/sh -e
+
+PREREQ=""
+
+# Output pre-requisites
+prereqs()
+{
+        echo "$PREREQ"
+}
+
+case "$1" in
+    prereqs)
+        prereqs
+        exit 0
+        ;;
+esac
+
+. /usr/share/initramfs-tools/hook-functions
+
+auto_add_modules base
+auto_add_modules block
+auto_add_modules mmc
+
+manual_add_modules ext4