From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752794AbZBDFcT (ORCPT ); Wed, 4 Feb 2009 00:32:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750910AbZBDFcH (ORCPT ); Wed, 4 Feb 2009 00:32:07 -0500 Received: from smtp109.mail.mud.yahoo.com ([209.191.85.219]:24284 "HELO smtp109.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750886AbZBDFcH (ORCPT ); Wed, 4 Feb 2009 00:32:07 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:From:To:Subject:Date:User-Agent:Cc:References:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id; b=JIOorKJoKpUEWtprC6yTqcS1abEQmLUYWbiCdLi5TnGqwZXTvcJC0ZAno/6OK+NxTiJFLsTwZog+P+NAMcxJvK3ZKa03wcZYSOF+V6LjiHZ800JLFu9YY6afH5yVjZgxPW+s0xBSKb7xgCFIxxT84oB5/W3sgjnNnUYXuhT9MLY= ; X-YMail-OSG: 0A0pJ3oVM1lc6xDS1biz_dfZ0isTdg8XpCWatfwxpuAKChcQF0FGb7rYcmYzBhv1QTDBr0lXNbShZ2xoxbKqxovx7VUPG9yNzBdB9MllFjvbXDtWLPz5WVIC3LisoZM.27jPSACDDtUZxeMMUcFpmUa3DeFQZXvmPOTBTXrf5if4174gv7H7XdEBnurVdQ-- X-Yahoo-Newman-Property: ymail-3 From: Nick Piggin To: Andrew Morton Subject: Re: FW: [PATCH] powerpc/mm: Export HPAGE_SHIFT Date: Wed, 4 Feb 2009 16:31:38 +1100 User-Agent: KMail/1.9.51 (KDE/4.0.4; ; ) Cc: Benjamin Herrenschmidt , Roland Dreier , Eli Cohen , linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org References: <20090203164930.GA10101@mtls03> <1233712248.16867.131.camel@pasglop> <20090203211329.d6190a08.akpm@linux-foundation.org> In-Reply-To: <20090203211329.d6190a08.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200902041631.39784.nickpiggin@yahoo.com.au> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 04 February 2009 16:13:29 Andrew Morton wrote: > On Wed, 04 Feb 2009 12:50:48 +1100 Benjamin Herrenschmidt > > Do the generic hugetlbfs code provides such an API ? If not, we may need > > to add one. > > I think it's something like > > huge_page_size(page_hstate(page)) That would work if you have a page, yes. If you want to query which hugepage sizes are available, then you probably want for_each_hstate() (which is only within mm/hugetlb.c at the moment, but I have no objections to exporting it and symbols it requires).