>>>>> "Grant" == Grant Likely <[EMAIL PROTECTED]> writes:
Hi, Grant> From: Grant Likely <[EMAIL PROTECTED]> Grant> Change the wait_tx routine to call cpu_relax() instead of udelay() to Grant> reduce console output latency and test for the TXFULL bit instead of Grant> TXEMPTY. That way the FIFO doesn't need to by 100% flushed before Grant> writing the next character. Sorry for the slow response - I had a misunderstanding with the phone company, and I'm now without inet :/ Looks good to me. I gave it a quick spin to check the speed difference: Old: [ 0.453101] Freeing unused kernel memory: 52k init New: [ 0.433686] Freeing unused kernel memory: 52k init So it shaves off ~20ms (~4%) of bootup. It ofcause means that the console routines return before the data is actually transmitted on the wire, but I guess you have to screw seriously up for the UART to die before emptying it's FIFO. Grant> Signed-off-by: Grant Likely <[EMAIL PROTECTED]> Acked-by: Peter Korsgaard <[EMAIL PROTECTED]> -- Bye, Peter Korsgaard _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
