From 280d62a559bc9d96259b4d784b942bee3c725573 Mon Sep 17 00:00:00 2001
From: Rahix <rahix@rahix.de>
Date: Thu, 16 May 2024 12:00:07 +0200
Subject: [PATCH] fw: iec: Fix warning about references to static mut

References to static mut quickly lead to undefined behavior.  Adjust the
code such that no direct references to static mut variables are created.
---
 Firmware-IEC/src-rust/matiec/ext.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Firmware-IEC/src-rust/matiec/ext.rs b/Firmware-IEC/src-rust/matiec/ext.rs
index 2ba022b..f262df7 100644
--- a/Firmware-IEC/src-rust/matiec/ext.rs
+++ b/Firmware-IEC/src-rust/matiec/ext.rs
@@ -22,13 +22,13 @@ macro_rules! io_tags_def {
         paste::paste! {
             $(
                 #[export_name = concat!("__", stringify!($IO))]
-                static mut [<$IO _ADDR>]: *const $Ty = unsafe { &$IO };
+                static mut [<$IO _ADDR>]: *const $Ty = unsafe { ::core::ptr::addr_of!($IO) };
                 pub static mut $IO: $Ty = 0;
             )*
 
             pub unsafe fn all_mut<'a>() -> [&'a mut $Ty; $N] {
                 [
-                    $(&mut $IO,)*
+                    $(&mut *::core::ptr::addr_of_mut!($IO),)*
                 ]
             }
         }