Re: [PATCH] sched/cpuacct: Check for NULL when using task_pt_regs()

From: Michael Ellerman
Date: Wed Apr 13 2016 - 07:02:15 EST


On Wed, 2016-04-13 at 09:43 +0200, Ingo Molnar wrote:
> * Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx> wrote:
>
> > * Anton Blanchard <anton@xxxxxxxxx> [2016-04-06 21:59:50]:
> >
> > > Looks good, and the patch below does fix the oops for me.
> > >
> > > Anton
> > > --
> > >
> > > task_pt_regs() can return NULL for kernel threads, so add a check.
> > > This fixes an oops at boot on ppc64.
> > >
> > > Signed-off-by: Anton Blanchard <anton@xxxxxxxxx>
> >
> > Works for me too.
> >
> > Reported-and-Tested-by: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
>
> Could someone please re-send the fix, because it has not reached me nor lkml.

It did hit LKML:

http://lkml.kernel.org/r/20160406215950.04bc3f0b@kryten

But that did have some verbiage at the top.

Anton's also resent it directly To you.

cheers