From bebe107f52af6ce373301a80fbbbc3020018399f Mon Sep 17 00:00:00 2001
From: Aelin <aelin@postmarketos.org>
Date: Sat, 7 Feb 2026 16:46:40 +0100
Subject: [PATCH] kconfigcheck: Only require zstd module (de)compression on 6.2
 or newer

The in-kernel zstd module decompression exists since kernel 6.2 [1], so
in order to accomodate split initramfs devices, we can only safely
require zstd module compression and decompression on 6.2 or newer.

[1]: https://github.com/torvalds/linux/commit/169a58ad824d896b9e291a27193342616e651b82

Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7952>
---
 kconfigcheck.toml | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/kconfigcheck.toml b/kconfigcheck.toml
index 6a8c5930c..591532412 100644
--- a/kconfigcheck.toml
+++ b/kconfigcheck.toml
@@ -85,10 +85,13 @@ LBDAF = "y"
 # Provide a proper dummy null console to improve compatibility
 # on devices that like to coerce console=null
 NULL_TTY = "m"
-["category:default".">=5.13.0"."all"]
+["category:default".">=6.2.0"."all"]
+# MODULE_COMPRESS_ZSTD exists since 5.13, but since kernels prior to 6.2 cannot
+# decompress it, we would break devices with split initramfs which use busybox
+# modprobe, so we only enforce it on 6.2 or newer
 MODULE_COMPRESS = "y"
 MODULE_COMPRESS_ZSTD = "y"
-["category:default".">=5.17.0"."all"]
+# MODULE_DECOMPRESS exists since 5.17, but can only decompress zstd since 6.2
 MODULE_DECOMPRESS = "y"
 ["category:default".">=5.19.0"."all"]
 FW_LOADER_COMPRESS = "y"