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Mark usage function as __dead2 in programs where it does not return
In most cases, usage does not return, so mark them as __dead2. For the cases where they do return, they have not been marked __dead2. Reviewed by: imp Pull Request: https://github.com/freebsd/freebsd-src/pull/735
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@ -61,7 +61,7 @@ static bool tcpswitchall(const char *, int);
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static bool tcpswitchbyname(const char *, const char *, const char *,
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const char *, int);
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static bool tcpswitchconn(const struct in_conninfo *, int);
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static void usage(void);
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static void usage(void) __dead2;
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/*
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* Switch a tcp connection.
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