From feefca1b1cfcb04b0c749dca9d4996a9c1b73618 Mon Sep 17 00:00:00 2001
From: Bryce Kahle <bryce.kahle@datadoghq.com>
Date: Tue, 15 Feb 2022 17:20:34 -0800
Subject: [PATCH] features: add LinuxVersionCode function to obtain
 LINUX_VERSION_CODE

In order to allow userspace to determine the value used for LINUX_VERSION_CODE
at compile time, expose the constant here.

This is useful when building eBPF objects at runtime.
---
 features/version.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 features/version.go

diff --git a/features/version.go b/features/version.go
new file mode 100644
index 000000000..f95d049e7
--- /dev/null
+++ b/features/version.go
@@ -0,0 +1,16 @@
+package features
+
+import "github.com/cilium/ebpf/internal"
+
+// LinuxVersionCode returns the version of the currently running kernel
+// as defined in the LINUX_VERSION_CODE compile-time macro.
+//
+// The kernel version and patch level are represented as a single value
+// equal to the KERNEL_VERSION macro from linux/version.h.
+func LinuxVersionCode() (uint32, error) {
+	v, err := internal.KernelVersion()
+	if err != nil {
+		return 0, err
+	}
+	return v.Kernel(), nil
+}