From 1906b44a51d8d364f439f4f6396fc89c0a704c97 Mon Sep 17 00:00:00 2001 From: Asahi Lina Date: Fri, 24 Feb 2023 17:09:47 +0900 Subject: [PATCH] rust: Enable the new_uninit feature for kernel and driver crates The unstable new_uninit feature enables various library APIs to create uninitialized containers, such as `Box::assume_init()`. This is necessary to build abstractions that directly initialize memory at the target location, instead of doing copies through the stack. Will be used by the DRM scheduler abstraction in the kernel crate, and by field-wise initialization (e.g. using `place!()` or a future replacement macro which may itself live in `kernel`) in driver crates. Link: https://github.com/Rust-for-Linux/linux/issues/879 Link: https://github.com/Rust-for-Linux/linux/issues/2 Link: https://github.com/rust-lang/rust/issues/63291 Signed-off-by: Asahi Lina Reviewed-by: Martin Rodriguez Reboredo Reviewed-by: Gary Guo Reviewed-by: Andreas Hindborg Reviewed-by: Vincenzo Palazzo Link: https://lore.kernel.org/r/20230224-rust-new_uninit-v1-1-c951443d9e26@asahilina.net [ Reworded to use `Link` tags. ] Signed-off-by: Miguel Ojeda --- rust/kernel/lib.rs | 1 + scripts/Makefile.build | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs index 223564f9f0cc..1118cd3e0b5f 100644 --- a/rust/kernel/lib.rs +++ b/rust/kernel/lib.rs @@ -17,6 +17,7 @@ #![feature(core_ffi_c)] #![feature(dispatch_from_dyn)] #![feature(generic_associated_types)] +#![feature(new_uninit)] #![feature(receiver_trait)] #![feature(unsize)] diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 76323201232a..1364e3d905fc 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -277,7 +277,7 @@ $(obj)/%.lst: $(src)/%.c FORCE # Compile Rust sources (.rs) # --------------------------------------------------------------------------- -rust_allowed_features := core_ffi_c +rust_allowed_features := core_ffi_c,new_uninit rust_common_cmd = \ RUST_MODFILE=$(modfile) $(RUSTC_OR_CLIPPY) $(rust_flags) \