From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758200AbZLKNxp (ORCPT ); Fri, 11 Dec 2009 08:53:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758244AbZLKNxj (ORCPT ); Fri, 11 Dec 2009 08:53:39 -0500 Received: from mx1.redhat.com ([209.132.183.28]:41609 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757855AbZLKNxh (ORCPT ); Fri, 11 Dec 2009 08:53:37 -0500 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <20091210004703.187264393@linutronix.de> References: <20091210004703.187264393@linutronix.de> <20091210001308.247025548@linutronix.de> To: Thomas Gleixner Cc: dhowells@redhat.com, LKML , "Paul E. McKenney" , Dipankar Sarma , Ingo Molnar , Peter Zijlstra , Oleg Nesterov , Al Viro , James Morris , Andrew Morton , Linus Torvalds , linux-security-module@vger.kernel.org Subject: Re: [patch 5/9] security: Use get_task_cred() in keyctl_session_to_parent() Date: Fri, 11 Dec 2009 13:52:43 +0000 Message-ID: <13415.1260539563@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Thomas Gleixner wrote: > Strictly this is not necessary today, but according to Paul McKenney > it's not guaranteed that irq disabled regions will prevent RCU > progress. That's a property of the current implementation. In > preempt-rt this assumption is not true anymore. > > Use get_task_cred() to make this future proof. > > Signed-off-by: Thomas Gleixner Acked-by: David Howells