nixos/kernel: correct kernelPatches.extraConfig documentation

It hasn't expected the prefix for a long time (possibly ever). Other
documentation and patches within nixpkgs itself (such as the crashdump
module) do not have the prefix.

1 files changed, 5 insertions, 4 deletions

diff --git a/nixos/modules/system/boot/kernel.nix b/nixos/modules/system/boot/kernel.nix
index 6b07686efcb..a46331ccd43 100644
--- a/nixos/modules/system/boot/kernel.nix
+++ b/nixos/modules/system/boot/kernel.nix
@@ -96,8 +96,8 @@ in
                                         # (required, but can be null if only config changes
                                         # are needed)
 
-          extraStructuredConfig = {     # attrset of extra configuration parameters
-            FOO = lib.kernel.yes;       # (without the CONFIG_ prefix, optional)
+          extraStructuredConfig = {     # attrset of extra configuration parameters without the CONFIG_ prefix
+            FOO = lib.kernel.yes;       # (optional)
           };                            # values should generally be lib.kernel.yes,
                                         # lib.kernel.no or lib.kernel.module
 
@@ -105,8 +105,9 @@ in
             foo = true;                 # (may be checked by other NixOS modules, optional)
           };
 
-          extraConfig = "CONFIG_FOO y"; # extra configuration options in string form
-                                        # (deprecated, use extraStructuredConfig instead, optional)
+          extraConfig = "FOO y";        # extra configuration options in string form without the CONFIG_ prefix
+                                        # (optional, multiple lines allowed to specify multiple options)
+                                        # (deprecated, use extraStructuredConfig instead)
         }
         ```