Hi, On Wed, Oct 6, 2010 at 10:14 PM, Mulyadi Santosa <[email protected]> wrote: > Hi :) > > > > On Thu, Oct 7, 2010 at 04:52, Sengottuvelan S <[email protected]> > wrote: >> Hi Santosa, > > You forgot to cc: kernelnewbies :) > >> Can you let me point me how to disable premption and interrupts in kernel >> mode. > > I think spin_lock_irqsave() followed by tight loop will do the > job...tight loop, ok? not schedule_timeout.... I forgot the function's > name to disable preemption, IIRC spin_lock_irqsave implies disabling > preemption, but that's just my guess.
You can should only need to use local_irq_disable. Using a spinlock only helps if you have another thread executing the same code. If only one thread executes a given piece of code then the spinlock doesn't actually do anything. Disabling interrupts disables preemption on the current core. You can call preempt_disable to disable preemption on all cores. -- Dave Hylands Shuswap, BC, Canada http://www.DaveHylands.com/ -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
