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[$] Standards for use of unsafe Rust in the kernel
Wednesday August 14, 2024. 04:17 PM , from LWN.net
Rust is intended to let programmers write safer code.
But compilers are not omniscient, and writing Rust code that interfaces with hardware (or that works with memory outside of Rust's lifetime paradigm) requires, at some point, the programmer's assurance that some operations are permissible. Benno Lossin suggested adding some more documentation to the Rust-for-Linux project clarifying the standards for commenting uses of unsafe in kernel code. There's general agreement that such standards are necessary, but less agreement on exactly when it is appropriate to use unsafe.
https://lwn.net/Articles/982868/
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