linuxPackages: properly propagate `features` and `extraConfig`

`kernel.override { features = ... }` didn't work before, now it works as
expected.

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

···
 
   lib = stdenv.lib;
 
+  # Combine the `features' attribute sets of all the kernel patches.
+  kernelFeatures = lib.fold (x: y: (x.features or {}) // y) ({
+    iwlwifi = true;
+    efiBootStub = true;
+    needsCifsUtils = true;
+    netfilterRPFilter = true;
+  } // features) kernelPatches;
+
+  configWithPlatform = kernelPlatform: import ./common-config.nix {
+    inherit stdenv version kernelPlatform extraConfig;
+    features = kernelFeatures; # Ensure we know of all extra patches, etc.
+  };
+
+  config = configWithPlatform stdenv.platform;
+  configCross = configWithPlatform hostPlatform.platform;
+
   kernelConfigFun = baseConfig:
     let
       configFromPatches =
···
   };
 
   passthru = {
-    # Combine the `features' attribute sets of all the kernel patches.
-    features = lib.fold (x: y: (x.features or {}) // y) features kernelPatches;
+    features = kernelFeatures;
 
     meta = kernel.meta // extraMeta;
 
     passthru = kernel.passthru // (removeAttrs passthru [ "passthru" "meta" ]);
   };
 
-  configWithPlatform = kernelPlatform: import ./common-config.nix
-    { inherit stdenv version kernelPlatform extraConfig;
-      features = passthru.features; # Ensure we know of all extra patches, etc.
-    };
-
-  config = configWithPlatform stdenv.platform;
-  configCross = configWithPlatform hostPlatform.platform;
-
   nativeDrv = lib.addPassthru kernel.nativeDrv passthru;
 
   crossDrv = lib.addPassthru kernel.crossDrv passthru;
-in if kernel ? crossDrv then nativeDrv // { inherit nativeDrv crossDrv; } else lib.addPassthru kernel passthru
+
+in if kernel ? crossDrv
+   then nativeDrv // { inherit nativeDrv crossDrv; }
+   else lib.addPassthru kernel passthru

pkgs/os-specific/linux/kernel/linux-4.12.nix

···
     url = "mirror://kernel/linux/kernel/v4.x/linux-${version}.tar.xz";
     sha256 = "18sxw7mw4fya7381mkah70s3di6b8xxfigjhrhb7zcczrffb4vl9";
   };
-
-  kernelPatches = args.kernelPatches;
-
-  features.iwlwifi = true;
-  features.efiBootStub = true;
-  features.needsCifsUtils = true;
-  features.netfilterRPFilter = true;
 } // (args.argsOverride or {}))

pkgs/os-specific/linux/kernel/linux-4.13.nix

···
     url = "mirror://kernel/linux/kernel/v4.x/linux-${version}.tar.xz";
     sha256 = "1lgwgw9yp5ywbylnmahsmqzs98yfq53mvvqqdgp7ljiqg8bxqjh6";
   };
-
-  kernelPatches = args.kernelPatches;
-
-  features.iwlwifi = true;
-  features.efiBootStub = true;
-  features.needsCifsUtils = true;
-  features.netfilterRPFilter = true;
 } // (args.argsOverride or {}))

pkgs/os-specific/linux/kernel/linux-4.9.nix

···
     url = "mirror://kernel/linux/kernel/v4.x/linux-${version}.tar.xz";
     sha256 = "0dhm5w7qa1hyqp254r41b4nhf10a8w7sv1mhd16f61inpb41829c";
   };
-
-  kernelPatches = args.kernelPatches;
-
-  features.iwlwifi = true;
-  features.efiBootStub = true;
-  features.needsCifsUtils = true;
-  features.netfilterRPFilter = true;
 } // (args.argsOverride or {}))

pkgs/os-specific/linux/kernel/linux-hardened-copperhead.nix

···
     repo = "linux-hardened";
     rev = "${version}.${revision}";
   };
-
-  kernelPatches = args.kernelPatches;
-
-  features.iwlwifi = true;
-  features.efiBootStub = true;
-  features.needsCifsUtils = true;
-  features.netfilterRPFilter = true;
 } // (args.argsOverride or {}))

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

···
     sha256 = "0vqjnkzcbbvyq24w3cryfmw7hhws1xqkkxqcv71szkbqqs6mcr14";
   };
 
-  kernelPatches = args.kernelPatches;
-
   extraConfig = ''
     IPV6 y
     MPTCP y
···
     TCP_CONG_OLIA m
     TCP_CONG_WVEGAS m
     TCP_CONG_BALIA m
-  '';
 
-  features.iwlwifi = true;
-  features.efiBootStub = true;
-  features.needsCifsUtils = true;
-  features.netfilterRPFilter = true;
+  '' + (args.extraConfig or "");
 } // (args.argsOverride or {}))

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

···
     sha256 = "1ly0x7a43zvig0fv7lc6rpq49pcdb7i9sdb78p4gi5485zap40kb";
   };
 
-  features.iwlwifi = true;
-  features.needsCifsUtils = true;
-  features.netfilterRPFilter = true;
+  features = {
+    efiBootStub = false;
+  } // (args.features or {});
 
   extraMeta.hydraPlatforms = [];
 })) (oldAttrs: {

pkgs/os-specific/linux/kernel/linux-samus-4.12.nix

···
       sha256 = "1dr74i79p8r13522w2ppi8gnjd9bhngc9d2hsn91ji6f5a8fbxx9";
     }; in "${upstream}/build/linux";
 
-  features.iwlwifi = true;
-  features.efiBootStub = true;
-  features.needsCifsUtils = true;
-  features.netfilterRPFilter = true;
-
   extraMeta.hydraPlatforms = [];
 } // (args.argsOverride or {}))

pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix

···
     BCACHEFS_FS m
   '';
 
-  features.iwlwifi = true;
-  features.efiBootStub = true;
-  features.needsCifsUtils = true;
-  features.netfilterRPFilter = true;
-
   # Should the testing kernels ever be built on Hydra?
   extraMeta.hydraPlatforms = [];
 

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

···
     sha256 = "0dhcsjgcy28pyyzwf2s0862p92bwb324kapli2y9n90bw0kl53gi";
   };
 
-  features.iwlwifi = true;
-  features.efiBootStub = true;
-  features.needsCifsUtils = true;
-  features.netfilterRPFilter = true;
-
   # Should the testing kernels ever be built on Hydra?
   extraMeta.hydraPlatforms = [];