On Wed, Oct 08, 2014 at 05:57:50PM +0200, Kristof Provost wrote: > On 2014-10-08 21:14:43 (+0530), Jeshwanth Kumar N K <jeshkumar555@xxxxxxxxx> wrote: > > Wayback when I was working on some project to wake up userspace program for > > every rising edge in GPIO pin (hall sensor), I use to send signal to the > > PID from kernel, before that userspace has to register its PID with kernel > > module. > > > I've seen a certain vendor[1] do something similar. They saved the task > pointer for whichever process made the magical ioctl() call and used it > to send signals from the interrupt handler. It worked, right up to the > point where the process went away and then the kernel panicked. Exactly, don't do that :) Finding out the real problem that is attempting to be solved would be good... greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
