Cmalloc is missing the trait item MIN_ALIGN introduced by commit 1b1a946dc2b5 ("rust: alloc: specify the minimum alignment of each allocator"), causing the following error on the `rusttest` make target. error[E0046]: not all trait items implemented, missing: `MIN_ALIGN` --> rust/kernel/alloc/allocator_test.rs:37:1 | 37 | unsafe impl Allocator for Cmalloc { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `MIN_ALIGN` in implementation | ::: rust/kernel/alloc.rs:146:5 | 146 | const MIN_ALIGN: usize; | ---------------------- `MIN_ALIGN` from trait Implement MIN_ALIGN for Cmalloc to fix this. Reported-by: Miguel Ojeda Closes: https://lore.kernel.org/all/CANiq72k0FSBTB2yOjiAy9PnAuyM=-PHxL3uQQ_Cv+zwswnr_bA@mail.gmail.com/ Fixes: 1b1a946dc2b5 ("rust: alloc: specify the minimum alignment of each allocator") Signed-off-by: Danilo Krummrich --- rust/kernel/alloc/allocator_test.rs | 2 ++ 1 file changed, 2 insertions(+) diff --git a/rust/kernel/alloc/allocator_test.rs b/rust/kernel/alloc/allocator_test.rs index a3074480bd8d..0d3c78ddcd69 100644 --- a/rust/kernel/alloc/allocator_test.rs +++ b/rust/kernel/alloc/allocator_test.rs @@ -35,6 +35,8 @@ // - passing a pointer to a valid memory allocation created by this `Allocator` is always OK, // - `realloc` provides the guarantees as provided in the `# Guarantees` section. unsafe impl Allocator for Cmalloc { + const MIN_ALIGN: usize = bindings::ARCH_KMALLOC_MINALIGN; + unsafe fn realloc( ptr: Option>, layout: Layout, base-commit: ac9eea3d08c25fb213deb113d246ff5dadb31fbc -- 2.50.1