From afa0e02d64b15707262f13a348b33dad735bd80f Mon Sep 17 00:00:00 2001
From: Matthieu Coudron <mattator@gmail.com>
Date: Wed, 18 Sep 2019 17:34:02 +0900
Subject: [PATCH] lib.kernel: make public

Remove the "version" parameter in order to make it more widely
available.
Starts making some kernel configuration helpers available.
The intent is to be able to better build and check the linux kernel
configuration.
---
 lib/default.nix                                   | 3 +++
 lib/kernel.nix                                    | 7 +------
 pkgs/os-specific/linux/kernel/common-config.nix   | 9 +++++++--
 pkgs/os-specific/linux/kernel/hardened-config.nix | 3 +--
 pkgs/os-specific/linux/kernel/mptcp-config.nix    | 2 +-
 5 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/lib/default.nix b/lib/default.nix
index 18d2dfae1e1..efa47a67f96 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -52,6 +52,9 @@ let
     # back-compat aliases
     platforms = systems.doubles;
 
+    # linux kernel configuration
+    kernel = callLibs ./kernel.nix;
+
     inherit (builtins) add addErrorContext attrNames concatLists
       deepSeq elem elemAt filter genericClosure genList getAttr
       hasAttr head isAttrs isBool isInt isList isString length
diff --git a/lib/kernel.nix b/lib/kernel.nix
index 36ea3083828..bfadf148be2 100644
--- a/lib/kernel.nix
+++ b/lib/kernel.nix
@@ -1,12 +1,7 @@
-{ lib, version }:
+{ lib }:
 
 with lib;
 {
-  # Common patterns/legacy
-  whenAtLeast = ver: mkIf (versionAtLeast version ver);
-  whenOlder   = ver: mkIf (versionOlder version ver);
-  # range is (inclusive, exclusive)
-  whenBetween = verLow: verHigh: mkIf (versionAtLeast version verLow && versionOlder version verHigh);
 
 
   # Keeping these around in case we decide to change this horrible implementation :)
diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 3b409f15aba..d414a084262 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -16,10 +16,15 @@
 }:
 
 with stdenv.lib;
-
-  with import ../../../../lib/kernel.nix { inherit (stdenv) lib; inherit version; };
+with stdenv.lib.kernel;
 
 let
+  # Common patterns/legacy
+  whenAtLeast = ver: mkIf (versionAtLeast version ver);
+  whenOlder   = ver: mkIf (versionOlder version ver);
+  # range is (inclusive, exclusive)
+  whenBetween = verLow: verHigh: mkIf (versionAtLeast version verLow && versionOlder version verHigh);
+
 
   # configuration items have to be part of a subattrs
   flattenKConf =  nested: mapAttrs (_: head) (zipAttrs (attrValues nested));
diff --git a/pkgs/os-specific/linux/kernel/hardened-config.nix b/pkgs/os-specific/linux/kernel/hardened-config.nix
index 156a4cf4423..b72994d6dd6 100644
--- a/pkgs/os-specific/linux/kernel/hardened-config.nix
+++ b/pkgs/os-specific/linux/kernel/hardened-config.nix
@@ -11,8 +11,7 @@
 { stdenv, version }:
 
 with stdenv.lib;
-with import ../../../../lib/kernel.nix { inherit (stdenv) lib; inherit version; };
-
+with stdenv.lib.kernel;
 assert (versionAtLeast version "4.9");
 
 optionalAttrs (stdenv.hostPlatform.platform.kernelArch == "x86_64") {
diff --git a/pkgs/os-specific/linux/kernel/mptcp-config.nix b/pkgs/os-specific/linux/kernel/mptcp-config.nix
index e5e3ee283ff..9752e63d9f9 100644
--- a/pkgs/os-specific/linux/kernel/mptcp-config.nix
+++ b/pkgs/os-specific/linux/kernel/mptcp-config.nix
@@ -1,5 +1,5 @@
 { stdenv }:
-with import ../../../../lib/kernel.nix { inherit (stdenv) lib; version = null; };
+with stdenv.lib.kernel;
 {
     # DRM_AMDGPU = yes;