From: Andrew Morton Subject: Re: [PATCH] arm: Export needed symbol for ZERO_PAGE usage in modules. Date: Mon, 24 Mar 2008 12:05:41 -0700 Message-ID: <20080324120541.04615a2b.akpm@linux-foundation.org> References: <1206381689-12600-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: cmm@us.ibm.com, rmk@arm.linux.org.uk, linux-ext4@vger.kernel.org, aneesh.kumar@linux.vnet.ibm.com To: "Aneesh Kumar K.V" Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:46113 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761182AbYCXTG1 (ORCPT ); Mon, 24 Mar 2008 15:06:27 -0400 In-Reply-To: <1206381689-12600-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, 24 Mar 2008 23:31:29 +0530 "Aneesh Kumar K.V" wrote: > ext4 use ZERO_PAGE(0) to zero out blocks. We need to export > different symbols in different arch for the usage of ZERO_PAGE > in modules. > > Signed-off-by: Aneesh Kumar K.V > --- > arch/arm/mm/mmu.c | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c > index d41a75e..2d6d682 100644 > --- a/arch/arm/mm/mmu.c > +++ b/arch/arm/mm/mmu.c > @@ -35,6 +35,7 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; > * zero-initialized data and COW. > */ > struct page *empty_zero_page; > +EXPORT_SYMBOL(empty_zero_page); > > /* I wonder if it would be better to do this export in generic code. Architectures which don't implement empty_zero_page: alpha: seems to do something fancy sparc64: need to rename mem_map_zero to empty_zero_page v850: #define ZERO_PAGE(vaddr) ((void *)0x87654321) (wtf?)