svn commit: r223989 - head/sys/dev/usb/input
Hans Petter Selasky
hselasky at freebsd.org
Mon Aug 29 14:57:00 UTC 2011
On Monday 29 August 2011 16:33:00 Andriy Gapon wrote:
> Not sure if this answers my question, which is not about pause vs
> ukbd_yield, but is about ukbd_yield vs kern_yield.
> In other words, why you couldn't simply use kern_yield where you used
> ukbd_yield?
Is this a new function. I think I used the following as an example:
void
uio_yield(void)
{
struct thread *td;
td = curthread;
DROP_GIANT();
thread_lock(td);
sched_prio(td, td->td_user_pri);
mi_switch(SW_INVOL | SWT_RELINQUISH, NULL);
thread_unlock(td);
PICKUP_GIANT();
}
As long as the kern_yield() lets the USB worker threads and XHCI interrupts
run it should be fine. pause() is better though.
--HPS
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