The simple answer would be we do not want to be interrupted during a interrupt handler. For SMP, there are other CPUs which can respond to IRQs.
-daveti > On Nov 2, 2014, at 2:30 PM, mind entropy <mindentr...@gmail.com> wrote: > > Hi, > > When I do spin_lock_irq it disables IRQ's which were enabled. What is > the reason for disabling all the irq's rather than disabling the > specific IRQ line which shares the resource? Wouldn't this be more > efficient and would not lose any interrupts especially if I have a > critical sensor ADC? > > Thanks, > Gautam. > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
