Does anyone know why this is required -- and for which systems?
[The reason is that the cost of an I/O instruction is large
and unneccessary ones should be removed. On a 350MHz PII, this
inb(0x21) takes around 600ns. This may not seem like a long time, but
it is around 200 instruction times.]
philip
-- Philip Gladstone +1 781 530 2461 Raptor Systems / Axent Technologies Waltham, MA http://www.raptor.com/- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu