sd_journal_flush_matches  918 src/journal/journalctl.c                 sd_journal_flush_matches(j);
sd_journal_flush_matches 1876 src/journal/sd-journal.c         sd_journal_flush_matches(j);
sd_journal_flush_matches  111 src/systemd/sd-journal.h void sd_journal_flush_matches(sd_journal *j);