Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759934AbcDMHn0 (ORCPT ); Wed, 13 Apr 2016 03:43:26 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:35773 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758175AbcDMHnY (ORCPT ); Wed, 13 Apr 2016 03:43:24 -0400 Date: Wed, 13 Apr 2016 09:43:19 +0200 From: Ingo Molnar To: Srikar Dronamraju Cc: Anton Blanchard , Peter Zijlstra , tglx@linutronix.de, efault@gmx.de, htejun@gmail.com, linux-kernel@vger.kernel.org, tj@kernel.org, torvalds@linux-foundation.org, zhaolei@cn.fujitsu.com, yangds.fnst@cn.fujitsu.com, hpa@zytor.com, Stephen Rothwell , Michael Ellerman , linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH] sched/cpuacct: Check for NULL when using task_pt_regs() Message-ID: <20160413074319.GA8968@gmail.com> References: <20160404140312.GA28495@linux.vnet.ibm.com> <20160406065436.GB3078@gmail.com> <20160406203219.788ae7cf@kryten> <20160406110803.GI2906@worktop> <20160406215950.04bc3f0b@kryten> <20160406132637.GA2108@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160406132637.GA2108@linux.vnet.ibm.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 573 Lines: 24 * Srikar Dronamraju wrote: > * Anton Blanchard [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 > > Works for me too. > > Reported-and-Tested-by: Srikar Dronamraju Could someone please re-send the fix, because it has not reached me nor lkml. Thanks, Ingo