From 8c9283d617563599a54082940b7735acea2789b0 Mon Sep 17 00:00:00 2001
From: Alyssa Ross <hi@alyssa.is>
Date: Wed, 17 Dec 2025 19:21:05 +0100
Subject: [PATCH] linux/common-config: enable FUNCTION_GRAPH_RETVAL

Enables recording return values of functions with ftrace.  Already
enabled by Fedora.
---
 pkgs/os-specific/linux/kernel/common-config.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 5f285fa3eb5f..d026c6107fe0 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -931,6 +931,7 @@ let
       BPF_EVENTS = yes;
       FUNCTION_PROFILER = yes;
       RING_BUFFER_BENCHMARK = no;
+      FUNCTION_GRAPH_RETVAL = whenAtLeast "6.5" yes;
     };
 
     perf = {