Eric Biggers <ebiggers3@xxxxxxxxx> wrote: > When 'head' and 'tail' wrap around, 'log->head - log->tail' will be > something like '4 - 252 = -248', and comparing that directly to the > array size is wrong. Fix by casting to 'u8'. I think a better fix is to use CIRC_CNT() or CIRC_SPACE(). David