imxrt-hal
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Eagerly address select Rust 2024 edition changes
The 2024 edition enables unsafe_op_in_unsafe_fn
by default. This PR adds unsafe
blocks and safety considerations throughout HAL and logging packages. There shouldn't be any functional changes.
Today's stable toolchain (1.77) also warns about the explicit references to static mut
s. I'm taking the simple approach to resolve this eventual hard error.
Tested on an 1170EVK using the rtic_logging
example, with both backends and both frontends.