linux_5_12: init at 5.12.2

pkgs/os-specific/linux/kernel/linux-5.12.nix

@@ -0,0 +1,20 @@
+{ lib, buildPackages, fetchurl, perl, buildLinux, nixosTests, modDirVersionArg ? null, ... } @ args:
+
+with lib;
+
+buildLinux (args // rec {
+  version = "5.12.2";
+
+  # modDirVersion needs to be x.y.z, will automatically add .0 if needed
+  modDirVersion = if (modDirVersionArg == null) then concatStringsSep "." (take 3 (splitVersion "${version}.0")) else modDirVersionArg;
+
+  # branchVersion needs to be x.y
+  extraMeta.branch = versions.majorMinor version;
+
+  src = fetchurl {
+    url = "mirror://kernel/linux/kernel/v5.x/linux-${version}.tar.xz";
+    sha256 = "03gp5vq8vkwvksjsa1birds37rmrr73s9ik6m1wvgz8mdncvk64c";
+  };
+
+  kernelTests = args.kernelTests or [ nixosTests.kernel-generic.linux_5_12 ];
+} // (args.argsOverride or {}))