From 0cfe38cf30be4f00a68eb3206f91df612fec9726 Mon Sep 17 00:00:00 2001
From: Philipp Schuster <phip1611@gmail.com>
Date: Wed, 19 Aug 2026 08:35:29 +0200
Subject: [PATCH] xtask: allow align 8 in check-raw

We need this for the layout fix for MemoryDescriptor.
---
 xtask/src/check_raw.rs | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/xtask/src/check_raw.rs b/xtask/src/check_raw.rs
index 6f638ff4..d5c326eb 100644
--- a/xtask/src/check_raw.rs
+++ b/xtask/src/check_raw.rs
@@ -323,7 +323,12 @@ fn check_fields(fields: &Punctuated<Field, Comma>, src: &Path) -> Result<(), Err
 }
 
 /// List with allowed combinations of representations (see [`Repr`]).
-const ALLOWED_REPRS: &[&[Repr]] = &[&[Repr::C], &[Repr::C, Repr::Packed], &[Repr::Transparent]];
+const ALLOWED_REPRS: &[&[Repr]] = &[
+    &[Repr::C],
+    &[Repr::C, Repr::Packed],
+    &[Repr::Align(8), Repr::C],
+    &[Repr::Transparent],
+];
 
 fn check_type_attrs(attrs: &[Attribute], spanned: &dyn Spanned, src: &Path) -> Result<(), Error> {
     let attrs = parse_attrs(attrs, src)?;
@@ -606,6 +611,20 @@ mod tests {
             .is_ok()
         );
 
+        // Valid `repr(C, align(8))` struct.
+        assert!(
+            check_struct(
+                &parse_quote! {
+                    #[repr(C, align(8))]
+                    pub struct S {
+                        pub f: u32,
+                    }
+                },
+                src(),
+            )
+            .is_ok()
+        );
+
         // Missing `pub` on struct.
         check_item_err(
             parse_quote! {