From mboxrd@z Thu Jan 1 00:00:00 1970 From: Catalin Marinas Subject: Re: [RFC PATCH V4 3/7] arm: mm: Enable HAVE_RCU_TABLE_FREE logic Date: Thu, 1 May 2014 12:11:21 +0100 Message-ID: <20140501111120.GF22316@arm.com> References: <1396018892-6773-1-git-send-email-steve.capper@linaro.org> <1396018892-6773-4-git-send-email-steve.capper@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from fw-tnat.austin.arm.com ([217.140.110.23]:12713 "EHLO collaborate-mta1.arm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755244AbaEALME (ORCPT ); Thu, 1 May 2014 07:12:04 -0400 Content-Disposition: inline In-Reply-To: <1396018892-6773-4-git-send-email-steve.capper@linaro.org> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Steve Capper Cc: "linux-arm-kernel@lists.infradead.org" , "linux@arm.linux.org.uk" , "linux-mm@kvack.org" , "linux-arch@vger.kernel.org" , "peterz@infradead.org" , "gary.robertson@linaro.org" , "anders.roxell@linaro.org" , "akpm@linux-foundation.org" On Fri, Mar 28, 2014 at 03:01:28PM +0000, Steve Capper wrote: > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index 1594945..7d5340d 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -58,6 +58,7 @@ config ARM > select HAVE_PERF_EVENTS > select HAVE_PERF_REGS > select HAVE_PERF_USER_STACK_DUMP > + select HAVE_RCU_TABLE_FREE if SMP You select this if (SMP && CPU_V7). On ARMv6 SMP systems we use IPI for TLB maintenance already. -- Catalin