I implemented a timer that can operate without interrupts. but it relies on smp or smt. what do you need it for ?
On Fri, Mar 6, 2009 at 5:08 PM, Greg Freemyer <[email protected]> wrote: > On Fri, Mar 6, 2009 at 9:59 AM, Asim <[email protected]> wrote: >> Yes - Actually I need to wait for a device to finish something after >> which I(device) error out. Ideally, I would like a simple >> function using the standard apis that works on most kernels. I cannot >> use jiffies as I mentioned earlier. Still working on it. >> >> -Asim > > In general the idea of waiting 2 whole ticks with interrupts disabled > is such a bad idea that I don't think you will find a pre-existing API > to do that. > > You definitely will not be able to simply check a variable because > with interrupts disabled, their is no one to update the variable. > > If you really need this, you will likely need a call into a routine > the gets the current time from a hardware clock. > > IMHO, such misbehaving code will never get into mainline and is not > even a good learning experience. > > Greg > -- > Greg Freemyer > Litigation Triage Solutions Specialist > http://www.linkedin.com/in/gregfreemyer > First 99 Days Litigation White Paper - > http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf > > The Norcross Group > The Intersection of Evidence & Technology > http://www.norcrossgroup.com > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to [email protected] > Please read the FAQ at http://kernelnewbies.org/FAQ > > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
