Update Kernel to 6.18 version (#207)

Updates kernel version to 6.18 for the nightly builds

6.18 is 'stable' as of now, but documented as the next LTS version [here](https://www.kernel.org/category/releases.html)

Fixes gardenlinux/gardenlinux#3974

Author: SujanaSubr

.github/workflows/pr-if-new-kernel.yml

@@ -9,7 +9,7 @@ jobs:
     # Matrix build for maintenance of multiple kernels
     strategy:
       matrix:
-        branch: ['main', 'maint-6.6']
+        branch: ['main', 'maint-6.12', 'maint-6.6']
     permissions:
       pull-requests: write
       contents: write

README.md

@@ -27,9 +27,10 @@ In some cases, we need to make changes to those to get a working build.
 
 | branch | description |
 | ------------- | -------------- |
-| `main` | latest lts kernel we maintain (6.12 as of December 2025) |
+| `main` | latest lts kernel we maintain (6.18) |
+| `maint-6.12` | maintenance of source code for kernel 6.12 |
 | `maint-6.6` | maintenance of source code for kernel 6.6 | 
-| `rel-1877` | backport for 1877, merge code from `main` | 
+| `rel-1877` | backport for 1877, merge code from `maint-6.12` | 
 | `rel-1592` | backport for 1592, merge code from `maint-6.6` |
 
 
@@ -55,10 +56,10 @@ git push
 ```
 
 > [!Tip]
-> You can find out the correct `.container` file by copying it from the corresponding tag of the https://github.com/gardenlinux/repo branch, for example [1443.0](https://github.com/gardenlinux/repo/blob/1443.0/.container)
+> You can find out the correct `.container` file by copying it from the corresponding tag of the https://github.com/gardenlinux/repo branch, for example [1877.0](https://github.com/gardenlinux/repo/blob/1877.0/.container)
 
 > [!Note]
-> We must create rel- branches to include the respective `.container` file, and not use maint for backports. This is required because multiple releases can use the same kernel version (e.g. rel-1443 and rel-1592 both use maint-6.6) 
+> We must create `rel-*` branches to include the respective `.container` file, and not use `maint-*` for backports. This is required because multiple releases can use the same kernel version (e.g. `rel-1443` and `rel-1592` both use `maint-6.6`) 
 
 ## Automated kernel patch level upgrades 
 

config/amd64/defines.toml

@@ -24,8 +24,6 @@ config = [
  'amd64/config.cloud-amd64',
  'config.gardenlinux'
 ]
-[flavour.defs]
-is_quick = true
 [flavour.description]
 hardware = 'x86-64 cloud'
 hardware_long = 'cloud platforms including Amazon EC2, Microsoft Azure, and Google Compute Engine'
@@ -34,8 +32,8 @@ hardware_long = 'cloud platforms including Amazon EC2, Microsoft Azure, and Goog
 name = 'none'
 
 [build]
+enable_rust = true
 enable_signed = false
-enable_vdso = true
 kernel_file = 'arch/x86/boot/bzImage'
 kernel_stem = 'vmlinuz'
 

config/arm64/defines.toml

@@ -25,8 +25,6 @@ config = [
  'arm64/config.cloud-arm64',
  'config.gardenlinux'
 ]
-[flavour.defs]
-is_quick = true
 [flavour.description]
 hardware = 'arm64 cloud'
 hardware_long = 'cloud platforms supporting arm64 virtual machines'
@@ -36,8 +34,8 @@ name = 'none'
 
 [build]
 compiler_gnutype_compat = 'arm-linux-gnueabihf'
+enable_rust = true
 enable_signed = false
-enable_vdso = true
 kernel_file = 'arch/arm64/boot/Image'
 kernel_stem = 'vmlinuz'
 

config/defines.toml

@@ -13,7 +13,12 @@ name = 'x86'
 name = 'none'
 
 [build]
-compiler = 'gcc'
+c_compiler = 'gcc'
+rust_build_depends = [
+  'rustc:native',
+  'bindgen:native',
+  'rust-src',
+]
 
 [relations.image]
 depends = [

config/riscv64/defines.toml

@@ -11,6 +11,6 @@ installer = true
 name = 'none'
 
 [build]
-enable_vdso = true
+enable_rust = true
 kernel_file = 'arch/riscv/boot/Image'
 kernel_stem = 'vmlinux'

finalize_source

@@ -1,5 +1,5 @@
 (
 	apt-get install --no-install-recommends -y kernel-wedge python3-jinja2 python3-dacite
 	cd "$dir/src"
-	{ PYTHONDONTWRITEBYTECODE=1 make -f debian/rules debian/control-real || true; } | grep 'generated SUCCESSFULLY'
+	PYTHONDONTWRITEBYTECODE=1 make -f debian/rules debian/control-real && echo "PASS" || echo "FAIL"
 )

fixes_debian/series

@@ -1,10 +1,10 @@
 pkg=linux
-version_orig=6.12.63
-version="$version_orig-3"
+version_orig=6.18.3
+version="$version_orig-1"
 
 (
 	debian_repo=https://salsa.debian.org/kernel-team/linux.git
-	debian_ref="debian/6.12.43-1"
+	debian_ref="debian/6.18.3-1"
 
 	tmp_dir="$(mktemp -d)"
 	trap 'cd / && rm -rf "$tmp_dir"' EXIT