Hi, Alan, We are making a SMP like patch to blackfin, cpu_relax() is replaced by a data cache flush function which will count it to a per-cpu counter. If this serial function is called too early, the per-cpu data area have not been initialized, this call will cause crash. So we'd like to use barrier() instead of cpu_relax(). BRs, Graf 在 2008-10-14二的 14:27 +0100，Alan Cox写道： > > - cpu_relax(); > > + barrier(); > > + > > Seems to be an odd unrelated change ? -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
