Greg, then what will you suggest for my case? I mean any alternative ? Thanks
On Wed, Oct 8, 2014 at 9:55 PM, Greg Kroah-Hartman <g...@kroah.com> wrote: > 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 < > jeshkumar...@gmail.com> 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 > -- Regards Jeshwanth Kumar N K Bangalore, India
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