start              42 kernel/log.c     int start;
start              61 kernel/log.c     log.start = sb->logstart;
start              76 kernel/log.c       struct buf *lbuf = bread(log.dev, log.start + tail + 1); // read log block
start              91 kernel/log.c     struct buf *buf = bread(log.dev, log.start);
start             107 kernel/log.c     struct buf *buf = bread(log.dev, log.start);
start             193 kernel/log.c       struct buf *to = bread(log.dev, log.start + tail + 1); // log block