From d735743b3984a9b0a0808adab35ccc8c174bdd95 Mon Sep 17 00:00:00 2001
From: Alyssa Ross <hi@alyssa.is>
Date: Tue, 24 Jun 2025 12:41:55 +0200
Subject: [PATCH] linux/common-config: enable AX25

This will allow dropping the linuxPackages_ham variant.  Fedora sets
these in their default kernel, so I don't anticipate any problem with
us doing the same.

Tested building linux_5_4, linux, and linux_latest on x86_64.
---
 nixos/tests/ax25.nix                            | 1 -
 pkgs/os-specific/linux/kernel/common-config.nix | 4 ++++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/nixos/tests/ax25.nix b/nixos/tests/ax25.nix
index df4e3de04cb1..abfa003a077e 100644
--- a/nixos/tests/ax25.nix
+++ b/nixos/tests/ax25.nix
@@ -7,7 +7,6 @@ let
   socatPort = 1234;
 
   createAX25Node = nodeId: {
-    boot.kernelPackages = pkgs.linuxPackages_ham;
     boot.kernelModules = [ "ax25" ];
 
     networking.firewall.allowedTCPPorts = [ socatPort ];
diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 2e233e073177..0408659f19c6 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -398,6 +398,10 @@ let
         # Enable debugfs for wireless drivers
         CFG80211_DEBUGFS = yes;
         MAC80211_DEBUGFS = yes;
+
+        # HAM radio
+        HAMRADIO = yes;
+        AX25 = module;
       }
       // lib.optionalAttrs (stdenv.hostPlatform.system == "aarch64-linux") {
         # Not enabled by default, hides modules behind it