665dfe93185a1decdb422f9e5b65a7e39415f129
This is useful so that callers know whether anything at all and how much was flushed. This patches through users of this functions to ensure that the return values > 0 which may be returned now are not propagated in public APIs. Also, users that ignore the return value are changed to do so explicitly now.
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systemd - System and Service Manager
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