From: Onur Özkan <work@onurozkan.dev>
Date: Sun, 20 Jul 2025 09:48:37 +0000 (+0300)
Subject: rust: make `ArrayLayout::new_unchecked` a `const fn`
X-Git-Tag: v6.18-rc1~174^2~39^2~8
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8d3e8057eeadab134a71d6a495d6f1b6818144fe;p=thirdparty%2Flinux.git

rust: make `ArrayLayout::new_unchecked` a `const fn`

Makes `ArrayLayout::new_unchecked` a `const fn` to allow
compile-time evaluation.

Signed-off-by: Onur Özkan <work@onurozkan.dev>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Benno Lossin <lossin@kernel.org>
Link: https://lore.kernel.org/r/20250720094838.29530-3-work@onurozkan.dev
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
---

diff --git a/rust/kernel/alloc/layout.rs b/rust/kernel/alloc/layout.rs
index 93ed514f7cc7e..52cbf61c4539e 100644
--- a/rust/kernel/alloc/layout.rs
+++ b/rust/kernel/alloc/layout.rs
@@ -80,7 +80,7 @@ impl<T> ArrayLayout<T> {
     /// # Safety
     ///
     /// `len` must be a value, for which `len * size_of::<T>() <= isize::MAX` is true.
-    pub unsafe fn new_unchecked(len: usize) -> Self {
+    pub const unsafe fn new_unchecked(len: usize) -> Self {
         // INVARIANT: By the safety requirements of this function
         // `len * size_of::<T>() <= isize::MAX`.
         Self {