zfs_2_1: 2.1.14 -> 2.1.15

This adds compatibility with newer kernels, which fixes
nixosTests.zfs.series_2_1, which broke when the default kernel version
was bumped.

This means we no longer need the removeLinuxDRM option at all, but
I've kept it around as a no-op so people can leave it set in case the
same thing happens again in future.

(cherry picked from commit 45f1428902a6fe08ff343a7ebb7254cd1ca98785)

2 files changed, 9 insertions, 42 deletions

diff --git a/nixos/modules/tasks/filesystems/zfs.nix b/nixos/modules/tasks/filesystems/zfs.nix
index f1faf474c93d7..a9aaf84877117 100644
--- a/nixos/modules/tasks/filesystems/zfs.nix
+++ b/nixos/modules/tasks/filesystems/zfs.nix
@@ -340,24 +340,12 @@ in
       removeLinuxDRM = lib.mkOption {
         type = types.bool;
         default = false;
-        description = lib.mdDoc ''
-          Linux 6.2 dropped some kernel symbols required on aarch64 required by zfs.
-          Enabling this option will bring them back to allow this kernel version.
-          Note that in some jurisdictions this may be illegal as it might be considered
-          removing copyright protection from the code.
-          See https://www.ifross.org/?q=en/artikel/ongoing-dispute-over-value-exportsymbolgpl-function for further information.
-
-          If configure your kernel package with `zfs.latestCompatibleLinuxPackages`, you will need to also pass removeLinuxDRM to that package like this:
+        description = ''
+          Patch the kernel to change symbols needed by ZFS from
+          EXPORT_SYMBOL_GPL to EXPORT_SYMBOL.
 
-          ```
-          { pkgs, ... }: {
-            boot.kernelPackages = (pkgs.zfs.override {
-              removeLinuxDRM = pkgs.hostPlatform.isAarch64;
-            }).latestCompatibleLinuxPackages;
-
-            boot.zfs.removeLinuxDRM = true;
-          }
-          ```
+          Currently has no effect, but may again in future if a kernel
+          update breaks ZFS due to symbols being newly changed to GPL.
         '';
       };
     };
@@ -583,9 +571,7 @@ in
         kernelParams = lib.optionals (!config.boot.zfs.allowHibernation) [ "nohibernate" ];
 
         extraModulePackages = [
-          (cfgZfs.modulePackage.override
-            (lib.optionalAttrs (lib.versionOlder cfgZfs.package.version "2.2.3")
-              { inherit (cfgZfs) removeLinuxDRM; }))
+          cfgZfs.modulePackage
         ];
       };
 
@@ -712,21 +698,6 @@ in
       services.udev.packages = [ cfgZfs.package ]; # to hook zvol naming, etc.
       systemd.packages = [ cfgZfs.package ];
 
-      # Export kernel_neon_* symbols again.
-      # This change is necessary until ZFS figures out a solution
-      # with upstream or in their build system to fill the gap for
-      # this symbol.
-      # In the meantime, we restore what was once a working piece of code
-      # in the kernel.
-      boot.kernelPatches = lib.optional (lib.versionOlder cfgZfs.package.version "2.2.3" && cfgZfs.removeLinuxDRM && pkgs.stdenv.hostPlatform.system == "aarch64-linux") {
-        name = "export-neon-symbols-as-gpl";
-        patch = pkgs.fetchpatch {
-          url = "https://github.com/torvalds/linux/commit/aaeca98456431a8d9382ecf48ac4843e252c07b3.patch";
-          hash = "sha256-L2g4G1tlWPIi/QRckMuHDcdWBcKpObSWSRTvbHRIwIk=";
-          revert = true;
-        };
-      };
-
       systemd.services = let
         createImportService' = pool: createImportService {
           inherit pool;
diff --git a/pkgs/os-specific/linux/zfs/2_1.nix b/pkgs/os-specific/linux/zfs/2_1.nix
index 7da642c5278b1..97173a5154a59 100644
--- a/pkgs/os-specific/linux/zfs/2_1.nix
+++ b/pkgs/os-specific/linux/zfs/2_1.nix
@@ -2,7 +2,6 @@
 , kernel ? null
 , stdenv
 , linuxKernel
-, removeLinuxDRM ? false
 , lib
 , nixosTests
 , ...
@@ -16,18 +15,15 @@ callPackage ./generic.nix args {
   # this attribute is the correct one for this package.
   kernelModuleAttribute = "zfs_2_1";
   # check the release notes for compatible kernels
-  kernelCompatible =
-    if stdenv'.isx86_64 || removeLinuxDRM
-    then kernel.kernelOlder "6.6"
-    else kernel.kernelOlder "6.2";
+  kernelCompatible = kernel.kernelOlder "6.8";
 
   latestCompatibleLinuxPackages = linuxKernel.packages.linux_6_6;
 
   # This is a fixed version to the 2.1.x series, move only
   # if the 2.1.x series moves.
-  version = "2.1.14";
+  version = "2.1.15";
 
-  hash = "sha256-RVAoZbV9yclGuN+D37SB6UCRFbbLEpBoyrQOQCVsQwE=";
+  hash = "sha256-zFO8fMbirEOrn5W57rAN7IWY6EIXG8jDXqhP7BWJyiY=";
 
   tests = [
     nixosTests.zfs.series_2_1