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kbuild: rust: remove the alloc crate and GlobalAlloc

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Now that we have our own `Allocator`, `Box` and `Vec` types we can remove
Rust's `alloc` crate and the `new_uninit` unstable feature.

Also remove `Kmalloc`'s `GlobalAlloc` implementation -- we can't remove
this in a separate patch, since the `alloc` crate requires a
`#[global_allocator]` to set, that implements `GlobalAlloc`.

Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20241004154149.93856-29-dakr@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Danilo Krummrich 2024-10-04 17:41:32 +02:00 • committed by Miguel Ojeda
parent 8ae740c391
commit 392e34b6bc
5 changed files with 16 additions and 108 deletions
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11
scripts/generate_rust_analyzer.py
View file

@ -64,13 +64,6 @@ def generate_crates(srctree, objtree, sysroot_src, external_src, cfgs):
[],
)
append_crate(
"alloc",
sysroot_src / "alloc" / "src" / "lib.rs",
["core", "compiler_builtins"],
cfg=crates_cfgs.get("alloc", []),
)
append_crate(
"macros",
srctree / "rust" / "macros" / "lib.rs",
@ -96,7 +89,7 @@ def generate_crates(srctree, objtree, sysroot_src, external_src, cfgs):
append_crate(
"kernel",
srctree / "rust" / "kernel" / "lib.rs",
["core", "alloc", "macros", "build_error", "bindings"],
["core", "macros", "build_error", "bindings"],
cfg=cfg,
)
crates[-1]["source"] = {
@ -133,7 +126,7 @@ def generate_crates(srctree, objtree, sysroot_src, external_src, cfgs):
append_crate(
name,
path,
["core", "alloc", "kernel"],
["core", "kernel"],
cfg=cfg,
)