>>>>> On Thu, 01 Jul 2004 21:14:56 +0900 (JST), Atsushi Nemoto <anemo@xxxxxxxxxxxxx> said: anemo> Current __udelay implementation will cause internal overflow on anemo> the first multiplication. anemo> Basically, the multiplication is: anemo> X = usecs * 2**64 / (100000 / HZ) anemo> And maximum input usecs value is 5000 (MAX_UDELAY_MS * 1000). anemo> If usecs == 5000 and HZ == 1000, X is 5 * 2**64. Of course anemo> this can not be held in 64bit variable. anemo> How should we avoid the overflow? anemo> .... Don't you really have any comments? I believe, for example, mdelay(10) does not work properly on most MIPS ports (except for DECSTATION and JAZZ which have smaller HZ value). --- Atsushi Nemoto
