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iflib: Make if_shared_ctx_t a pointer to const
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Authored by markj on Mar 5 2021, 9:10 PM.

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Summary

This structure is shared among multiple instances of a driver, so we
should ensure that it doesn't somehow get treated as if there's a
separate instance per interface. This is especially important for
software-only drivers like wg.

We could perhaps make DEVICE_REGISTER return a pointer to const as well,
so the sctx structures themselves could be defined as const. I don't
quite understand what this method is supposed to do in the general case
though, so I didn't modify it.

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R10 FreeBSD src repository
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