Benno Lossin 701608bd03 rust: sync: reduce stack usage of UniqueArc::try_new_uninit ...

`UniqueArc::try_new_uninit` calls `Arc::try_new(MaybeUninit::uninit())`.
This results in the uninitialized memory being placed on the stack,
which may be arbitrarily large due to the generic `T` and thus could
cause a stack overflow for large types.

Change the implementation to use the pin-init API which enables in-place
initialization. In particular it avoids having to first construct and
then move the uninitialized memory from the stack into the final location.

Signed-off-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Andreas Hindborg <a.hindborg@samsung.com>
Link: https://lore.kernel.org/r/20230408122429.1103522-15-y86-dev@protonmail.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

2023-04-12 18:41:05 +02:00

..

init

rust: init: add stack_pin_init! macro

2023-04-12 18:41:05 +02:00

sync

rust: sync: reduce stack usage of UniqueArc::try_new_uninit

2023-04-12 18:41:05 +02:00

allocator.rs

rust: add kernel crate

2022-09-28 08:58:24 +02:00

build_assert.rs

rust: build_assert: add build_{error,assert}! macros

2022-12-04 01:59:16 +01:00

error.rs

rust: error: Add from_result() helper

2023-04-12 18:41:04 +02:00

init.rs

rust: types: add Opaque::ffi_init

2023-04-12 18:41:05 +02:00

lib.rs

rust: sync: reduce stack usage of UniqueArc::try_new_uninit

2023-04-12 18:41:05 +02:00

prelude.rs

rust: prelude: add pin-init API items to prelude

2023-04-12 18:41:05 +02:00

print.rs

rust: print: avoid evaluating arguments in pr_* macros in unsafe blocks

2023-01-16 00:54:35 +01:00

static_assert.rs

rust: static_assert: add static_assert! macro

2022-12-04 01:59:16 +01:00

std_vendor.rs

rust: std_vendor: add dbg! macro based on std's one

2022-12-04 01:59:16 +01:00

str.rs

rust: str: add fmt! macro

2022-12-04 01:59:16 +01:00

sync.rs

rust: sync: introduce UniqueArc

2023-01-16 23:48:06 +01:00

types.rs

rust: types: add Opaque::ffi_init

2023-04-12 18:41:05 +02:00