From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E91A3C433F5 for ; Tue, 22 Mar 2022 13:02:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235192AbiCVNEJ (ORCPT ); Tue, 22 Mar 2022 09:04:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232538AbiCVNEI (ORCPT ); Tue, 22 Mar 2022 09:04:08 -0400 Received: from out30-42.freemail.mail.aliyun.com (out30-42.freemail.mail.aliyun.com [115.124.30.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7094285BC7; Tue, 22 Mar 2022 06:02:40 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R491e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04426;MF=xiaoguang.wang@linux.alibaba.com;NM=1;PH=DS;RN=7;SR=0;TI=SMTPD_---0V7wHIq1_1647954157; Received: from 30.225.28.195(mailfrom:xiaoguang.wang@linux.alibaba.com fp:SMTPD_---0V7wHIq1_1647954157) by smtp.aliyun-inc.com(127.0.0.1); Tue, 22 Mar 2022 21:02:37 +0800 Message-ID: <37d6b269-dd9d-dbd1-74b1-4191cc3d4bf9@linux.alibaba.com> Date: Tue, 22 Mar 2022 21:02:34 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [RFC 2/3] mm: export zap_page_range() Content-Language: en-US To: David Hildenbrand , linux-mm@kvack.org, target-devel@vger.kernel.org, linux-scsi@vger.kernel.org Cc: linux-block@vger.kernel.org, xuyu@linux.alibaba.com, bostroesser@gmail.com References: <20220318095531.15479-1-xiaoguang.wang@linux.alibaba.com> <20220318095531.15479-3-xiaoguang.wang@linux.alibaba.com> From: Xiaoguang Wang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org hi, > On 18.03.22 10:55, Xiaoguang Wang wrote: >> Module target_core_user will use it to implement zero copy feature. >> >> Signed-off-by: Xiaoguang Wang >> --- >> mm/memory.c | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/mm/memory.c b/mm/memory.c >> index 1f745e4d11c2..9974d0406dad 100644 >> --- a/mm/memory.c >> +++ b/mm/memory.c >> @@ -1664,6 +1664,7 @@ void zap_page_range(struct vm_area_struct *vma, unsigned long start, >> mmu_notifier_invalidate_range_end(&range); >> tlb_finish_mmu(&tlb); >> } >> +EXPORT_SYMBOL_GPL(zap_page_range); >> >> /** >> * zap_page_range_single - remove user pages in a given range > To which VMAs will you be applying zap_page_range? I assume only to some > special ones where you previously vm_insert_page(s)_mkspecial'ed pages, > not to some otherwise random VMAs, correct? Yes, you're right :) Regards, Xiaoguang Wang >