On Fri, 24 Feb 2023 17:09:47 +0900 Asahi Lina <lina@xxxxxxxxxxxxx> wrote: > 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. > > See [1] [2] [3] for background information. > > [1] https://github.com/Rust-for-Linux/linux/issues/879 > [2] https://github.com/Rust-for-Linux/linux/issues/2 > [3] https://github.com/rust-lang/rust/issues/63291 > > Signed-off-by: Asahi Lina <lina@xxxxxxxxxxxxx> Reviewed-by: Gary Guo <gary@xxxxxxxxxxx> > --- > 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 a0d5c6cca76d..0f637e1ca8dc 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) \ > > --- > base-commit: 83f978b63fa7ad474ca22d7e2772c5988101c9bd > change-id: 20230224-rust-new_uninit-a575d34987c3 > > Thank you, > ~~ Lina >
