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Ubuntu20.04 when config conditionnal syscall deny I met a compile error ``` error: linking with `cc` failed: exit status: 1 ... ... = note: /usr/bin/ld: cannot find -lseccomp ``` solution:...

Hi, I'm learning concurrency programming these days, just curious to know if it is OK to use ptr::read() below: https://github.com/Amanieu/seqlock/blob/b72653fd9c38141da7e588a97a1b654239f5d4df/src/lib.rs#L136 when write operation finished, there is a `Release` ording here:...