From 591118c56da2bfcea060e3b7671bc87b23c0e44a Mon Sep 17 00:00:00 2001
From: Antonio Alvarez Feijoo <antonio.feijoo@suse.com>
Date: Fri, 10 Sep 2021 13:45:46 +0200
Subject: [PATCH] feat(dracut.sh): check if target kernel has zstd support
 compiled in

If compression option is zstd, check if target kernel supports it.
Otherwise, do not compress the initramfs image.
---
 dracut.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/dracut.sh b/dracut.sh
index 19d21ed971..0f111e80cf 100755
--- a/dracut.sh
+++ b/dracut.sh
@@ -2381,6 +2381,11 @@ case $compress in
         ;;
 esac
 
+if [[ $compress == $DRACUT_COMPRESS_ZSTD* ]] && ! check_kernel_config CONFIG_RD_ZSTD; then
+    dwarn "dracut: kernel has no zstd support compiled in."
+    compress="cat"
+fi
+
 if ! (
     umask 077
     cd "$initdir"