From 690a83091bd0e10ce7c70b081c861a6ff2a6d532 Mon Sep 17 00:00:00 2001
From: Tim Steinbach <tim@nequissimus.com>
Date: Thu, 25 May 2017 18:25:08 -0400
Subject: [PATCH] linux: FS_ENCRYPTION only for >= 4.9 kernels

---
 pkgs/os-specific/linux/kernel/common-config.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index cd71d563a2f..1dc161cca54 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -238,7 +238,9 @@ with stdenv.lib;
   FANOTIFY y
   TMPFS y
   TMPFS_POSIX_ACL y
-  FS_ENCRYPTION? m
+  ${optionalString (versionAtLeast version "4.9") ''
+    FS_ENCRYPTION? m
+  ''}
   EXT2_FS_XATTR y
   EXT2_FS_POSIX_ACL y
   EXT2_FS_SECURITY y