lkml.org 
[lkml]   [2023]   [Feb]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Date
    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.

    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@asahilina.net>
    ---
    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

    \
     
     \ /
      Last update: 2023-03-27 00:34    [W:3.523 / U:0.028 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site