[SRU][I/kvm][PATCH] UBUNTU: [Packaging] use ZSTD to compress kernel

[Dimitri John Ledkov]

BugLink: https://bugs.launchpad.net/bugs/1931725

Follow generic kernel bootspeed improvement in the kvm flavour by
switching from lz4 to zstd compressed kernel image.

Signed-off-by: Dimitri John Ledkov <dimitri.ledkov at canonical.com>
---
 debian.kvm/config/config.common.ubuntu | 4 ++--
 debian.kvm/control.stub.in             | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/debian.kvm/config/config.common.ubuntu b/debian.kvm/config/config.common.ubuntu
index a06bc85299..9e21d07187 100644
--- a/debian.kvm/config/config.common.ubuntu
+++ b/debian.kvm/config/config.common.ubuntu
@@ -1451,11 +1451,11 @@ CONFIG_KCMP=y
 # CONFIG_KCSAN is not set
 # CONFIG_KERNEL_BZIP2 is not set
 # CONFIG_KERNEL_GZIP is not set
-CONFIG_KERNEL_LZ4=y
+# CONFIG_KERNEL_LZ4 is not set
 # CONFIG_KERNEL_LZMA is not set
 # CONFIG_KERNEL_LZO is not set
 # CONFIG_KERNEL_XZ is not set
-# CONFIG_KERNEL_ZSTD is not set
+CONFIG_KERNEL_ZSTD=y
 CONFIG_KERNFS=y
 CONFIG_KEXEC=y
 # CONFIG_KEXEC_BZIMAGE_VERIFY_SIG is not set
diff --git a/debian.kvm/control.stub.in b/debian.kvm/control.stub.in
index 7d0dbf9569..2fc410edd8 100644
--- a/debian.kvm/control.stub.in
+++ b/debian.kvm/control.stub.in
@@ -35,7 +35,7 @@ Build-Depends:
  libnuma-dev [amd64 arm64 ppc64el s390x] <!stage1>,
  dkms <!stage1>,
  curl <!stage1>,
- lz4 [amd64 s390x] <!stage1>,
+ zstd [amd64 s390x] <!stage1>,
  dwarves [amd64 arm64 armhf ppc64el s390x] <!stage1>,
 Build-Depends-Indep:
  xmlto <!stage1>,
-- 
2.30.2