Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935173Ab1ETB7v (ORCPT ); Thu, 19 May 2011 21:59:51 -0400 Received: from gate.crashing.org ([63.228.1.57]:49048 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934642Ab1ETB7t (ORCPT ); Thu, 19 May 2011 21:59:49 -0400 Subject: Re: [PATCH 5/7] [RFC] force 32-byte aligned kmallocs From: Benjamin Herrenschmidt To: Eric Van Hensbergen Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, bg-linux@lists.anl-external.org In-Reply-To: <1305753895-24845-5-git-send-email-ericvh@gmail.com> References: <1305753895-24845-1-git-send-email-ericvh@gmail.com> <1305753895-24845-5-git-send-email-ericvh@gmail.com> Content-Type: text/plain; charset="UTF-8" Date: Fri, 20 May 2011 10:36:09 +1000 Message-ID: <1305851769.7481.90.camel@pasglop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1096 Lines: 34 On Wed, 2011-05-18 at 16:24 -0500, Eric Van Hensbergen wrote: > For BGP, it is convenient for 'kmalloc' to come back with 32-byte > aligned units for torus DMA > > Signed-off-by: Eric Van Hensbergen > --- > arch/powerpc/include/asm/page_32.h | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/arch/powerpc/include/asm/page_32.h b/arch/powerpc/include/asm/page_32.h > index 68d73b2..fb0a7ae 100644 > --- a/arch/powerpc/include/asm/page_32.h > +++ b/arch/powerpc/include/asm/page_32.h > @@ -9,7 +9,7 @@ > > #define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32 > > -#ifdef CONFIG_NOT_COHERENT_CACHE > +#if defined(CONFIG_NOT_COHERENT_CACHE) || defined(CONFIG_BGP) > #define ARCH_DMA_MINALIGN L1_CACHE_BYTES > #endif Is DMA cache coherent on BG/P ? That's odd for a 4xx base :-) Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/