From a06d64ea6989797978757142e5a1c1750b95d5ba Mon Sep 17 00:00:00 2001
From: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Date: Sat, 7 Oct 2017 10:58:30 +0300
Subject: [PATCH] kernel config: Explicitly enable device mapper

A no-op change on x86 but enables it on ARM.
---
 pkgs/os-specific/linux/kernel/common-config.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 6d04340ab46..a528df26964 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -245,6 +245,9 @@ with stdenv.lib;
   USB_SERIAL_KEYSPAN_USA49W y
   USB_SERIAL_KEYSPAN_USA49WLC y
 
+  # Device mapper (RAID, LVM, etc.)
+  MD y
+
   # Filesystem options - in particular, enable extended attributes and
   # ACLs for all filesystems that support them.
   FANOTIFY y