sys-kernel/coreos-kernel: Decompress the minimal initrd kernel modules

The initrd itself is already compressed with xz, so compressing the
modules within with xz as well just makes the image bigger and slower.

Not compressing all the kernel modules in the first place is not such a
clear win because it is zlib and zstd compression that is applied
elsewhere.

Signed-off-by: James Le Cuirot <jlecuirot@microsoft.com>

Author: chewi

sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-kernel/coreos-kernel-6.12.54.ebuild

@@ -108,15 +108,16 @@ src_compile() {
 	ln -s usr/lib64 lib || die
 	ln -s usr/lib64 lib64 || die
 	ln -s lib64 usr/lib || die
-	mkdir -p lib/modules/"${KV_FULL}"/ || die
 	# Instead from ESYSROOT we can also copy kernel modules from the dracut pre-selection
-	cp "${S}"/build/bootengine/usr/lib/modules/"${KV_FULL}"/modules.* lib/modules/"${KV_FULL}"/ || die
 	mkdir -p lib/modprobe.d/ || die
 	cp "${S}"/build/bootengine/lib/modprobe.d/* lib/modprobe.d/ || die
 	# Only include modules related to mounting /usr and for interacting with the emergency console
 	pushd "${S}/build/bootengine/usr/lib/modules/${KV_FULL}" || die
 	find kernel/drivers/{ata,block,hid,hv,input/serio,mmc,nvme,pci,scsi,usb} kernel/fs/{btrfs,overlayfs,squashfs} kernel/security/keys -name "*.ko.*" -printf "%f\0" | DRACUT_NO_XATTR=1 xargs --null "${BROOT}"/usr/lib/dracut/dracut-install --destrootdir "${S}"/build/minimal --kerneldir . --sysrootdir "${S}"/build/bootengine/ --firmwaredirs "${S}"/build/bootengine/usr/lib/firmware --module dm-verity dm-mod virtio_console || die
 	popd || die
+	# Double compression only makes the image bigger and slower
+	find . -name "*.ko.xz" -exec unxz {} + || die
+	depmod -a -b . "${KV_FULL}" || die
 	echo '$MODALIAS=.*	0:0 660 @/sbin/modprobe "$MODALIAS"' > ./etc/mdev.conf || die
 	# We can't use busybox's modprobe because it doesn't support the globs in module.alias, breaking module loading
 	DRACUT_NO_XATTR=1 "${BROOT}"/usr/lib/dracut/dracut-install --destrootdir . --sysrootdir "${ESYSROOT}" --ldd /bin/veritysetup /bin/dmsetup /bin/busybox /sbin/modprobe || die