Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756376AbYGaTE1 (ORCPT ); Thu, 31 Jul 2008 15:04:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752437AbYGaTER (ORCPT ); Thu, 31 Jul 2008 15:04:17 -0400 Received: from gate.crashing.org ([63.228.1.57]:44541 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753096AbYGaTEQ (ORCPT ); Thu, 31 Jul 2008 15:04:16 -0400 Cc: linuxppc-dev list , Nick Piggin , Linux Kernel list , Kumar Gala Message-Id: From: Kumar Gala To: Josh Boyer In-Reply-To: Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v926) Subject: Re: [PATCH] powerpc/mm: Implement _PAGE_SPECIAL & pte_special() for 32-bit Date: Thu, 31 Jul 2008 13:50:28 -0500 References: X-Mailer: Apple Mail (2.926) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1059 Lines: 39 On Jul 31, 2008, at 1:48 PM, Kumar Gala wrote: > Implement _PAGE_SPECIAL and pte_special() for 32-bit powerpc. This > bit will > be used by the fast get_user_pages() to differenciate PTEs that > correspond > to a valid struct page from special mappings that don't such as IO > mappings > obtained via io_remap_pfn_ranges(). > > We currently only implement this on sub-arch that support SMP or > will so > in the future (6xx, 44x, FSL-BookE) and not (8xx, 40x). > > Signed-off-by: Kumar Gala > --- > Nick, do you forsee using _PAGE_SPECIAL for other applications that > would > be of interested to non-SMP hw? > > We can look at adding it into 8xx and 40x, but was being lazy as I > assume > there is no point. > > - k Josh, Can you test this on 44x for me. thanks - k -- 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/