From 3e5c0306ccaa277a6bcf189a26789825841a0402 Mon Sep 17 00:00:00 2001
From: William Cohen <wcohen@redhat.com>
Date: Wed, 6 Nov 2024 16:24:06 -0500
Subject: [PATCH] Deal with kernels pre-6.12 kernel that relocated unaligned.h

Observed on kernel-6.11.0-28.el10 the <asm/unaligned.h> was moved to
<linux/unaligned.h>.  The check was just looking at the kernel version
which was not sufficient on this Linux 6.11 with a backport moving
unaligned.h.
---
 buildrun.cxx                               | 3 +++
 runtime/linux/autoconf-linux-unaligned-h.c | 1 +
 runtime/sym.c                              | 2 +-
 3 files changed, 5 insertions(+), 1 deletion(-)
 create mode 100644 runtime/linux/autoconf-linux-unaligned-h.c

diff --git a/buildrun.cxx b/buildrun.cxx
index b08d06ed3..e5cb563b8 100644
--- a/buildrun.cxx
+++ b/buildrun.cxx
@@ -555,6 +555,9 @@ compile_pass (systemtap_session& s)
   output_autoconf(s, o, cs, "autoconf-files_lookup_fd_raw.c",
                   "STAPCONF_FILES_LOOKUP_FD_RAW", NULL);
   output_autoconf(s, o, cs, "autoconf-task-state.c", "STAPCONF_TASK_STATE", NULL);
+
+  output_autoconf(s, o, cs, "autoconf-linux-unaligned-h.c", "STAPCONF_LINUX_UNALIGNED_H", NULL);
+
   
   // used by runtime/linux/netfilter.c
   output_exportconf(s, o2, "nf_register_hook", "STAPCONF_NF_REGISTER_HOOK");
diff --git a/runtime/linux/autoconf-linux-unaligned-h.c b/runtime/linux/autoconf-linux-unaligned-h.c
new file mode 100644
index 000000000..6359283b3
--- /dev/null
+++ b/runtime/linux/autoconf-linux-unaligned-h.c
@@ -0,0 +1 @@
+#include <linux/unaligned.h>
diff --git a/runtime/sym.c b/runtime/sym.c
index acae95818..a1a25f30e 100644
--- a/runtime/sym.c
+++ b/runtime/sym.c
@@ -18,7 +18,7 @@
 #ifdef STP_NEED_LINE_DATA
 #include "unwind/unwind.h"
 #endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(6,12,0)
+#ifdef STAPCONF_LINUX_UNALIGNED_H
 #include <linux/unaligned.h>
 #else
 #include <asm/unaligned.h>
-- 
2.43.5