From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161270AbcFOVsH (ORCPT ); Wed, 15 Jun 2016 17:48:07 -0400 Received: from b.ns.miles-group.at ([95.130.255.144]:44723 "EHLO radon.swed.at" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933102AbcFOVru (ORCPT ); Wed, 15 Jun 2016 17:47:50 -0400 Subject: Re: [PATCH tip/core/rcu 08/12] rcu: Disable TASKS_RCU for usermode Linux To: "Paul E. McKenney" , linux-kernel@vger.kernel.org References: <20160615214550.GA4931@linux.vnet.ibm.com> <1466027173-5501-8-git-send-email-paulmck@linux.vnet.ibm.com> Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, dvhart@linux.intel.com, fweisbec@gmail.com, oleg@redhat.com, bobby.prani@gmail.com, Jeff Dike From: Richard Weinberger Message-ID: <5761CCFE.9000308@nod.at> Date: Wed, 15 Jun 2016 23:47:42 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.7.1 MIME-Version: 1.0 In-Reply-To: <1466027173-5501-8-git-send-email-paulmck@linux.vnet.ibm.com> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am 15.06.2016 um 23:46 schrieb Paul E. McKenney: > Usermode Linux currently does not implement arch_irqs_disabled_flags(), > which results in a build failure in TASKS_RCU. Therefore, this commit > disables the TASKS_RCU Kconfig option in usermode Linux builds. The > usermode Linux maintainers expect to merge arch_irqs_disabled_flags() > into 4.8, at which point this commit may be reverted. > > Signed-off-by: Paul E. McKenney > Cc: Richard Weinberger > Cc: Jeff Dike > --- > init/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/init/Kconfig b/init/Kconfig > index f755a602d4a1..a068265fbcaf 100644 > --- a/init/Kconfig > +++ b/init/Kconfig > @@ -517,6 +517,7 @@ config SRCU > config TASKS_RCU > bool > default n > + depends on !UML > select SRCU > help > This option enables a task-based RCU implementation that uses Acked-by: Richard Weinberger Thanks, //richard