Remove 'static mut' usage in features::os::kernel_version. #2029
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Resolves #2028
Note that this is (AFAICT) the first use of
Atomic*
types innix
(other than tests). However, this shouldn't be a portability issue, sincenix
is not#![no_std]
, and (IIUC)std
requires at least loads and stores of pointer-sized atomics (i.e.AtomicUsize
), which is all this PR uses.