start              40 log.c            int start;
start              61 log.c            log.start = sb.logstart;
start              74 log.c              struct buf *lbuf = bread(log.dev, log.start+tail+1); // read log block
start              87 log.c            struct buf *buf = bread(log.dev, log.start);
start             103 log.c            struct buf *buf = bread(log.dev, log.start);
start             180 log.c              struct buf *to = bread(log.dev, log.start+tail+1); // log block