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 67050C4332F for ; Mon, 21 Mar 2022 12:01:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346746AbiCUMDQ (ORCPT ); Mon, 21 Mar 2022 08:03:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37028 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347050AbiCUMDP (ORCPT ); Mon, 21 Mar 2022 08:03:15 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CD36C53E2F for ; Mon, 21 Mar 2022 05:01:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647864108; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hjyieAFQj3bcVjxdPEDIjVTjL278YKH95kf+yFJHAWk=; b=XkJGtS4eAvnKpNIaz8QX4XLpjNLeFWhPWGhL/JOamaVjjwehye3806k+MYCJrWratEPnEa LyVJjd3lu9DdOcuWtCyrXhxDgOKA9EUQqna9c1nvchluMlIwQu89hbRUEw02SF4tdDIgqw I3dLrcBpoVWGsfOb7mgku2bRCaVmmPM= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-605-Gc-YAZZgOtODheWWLJZmdg-1; Mon, 21 Mar 2022 08:01:47 -0400 X-MC-Unique: Gc-YAZZgOtODheWWLJZmdg-1 Received: by mail-wr1-f69.google.com with SMTP id f18-20020adf9f52000000b00203d86759beso3027217wrg.11 for ; Mon, 21 Mar 2022 05:01:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:organization:in-reply-to :content-transfer-encoding; bh=hjyieAFQj3bcVjxdPEDIjVTjL278YKH95kf+yFJHAWk=; b=BH7JHRle8tY2SXHas16TI5Hc3dHk2sWFUNZBt+QUThdMEXbamUnTtAm3Hgd3FTa+1J uohT7S6kYuxoVdmoNcbrqUqvuhW1ytrmM0PSJIfCG94yUnvwDITvXFwJzZ5OWFGDAHCy IiiSGfuQntfEUsjoGtdP0hj2P8ZpDjnEd/P4hziCcOM81mXgIY4Fs5osTIG3kFug7uy2 Ko0EIEISsjxlQ4RT1R+HcCbMlppB9nTnTDqhta9GqxkqkK725cIMQrhFh+t9QBZO46x0 bthHLL8ytdIZkVjn4ntYm1rR95DvZ5oIwZgsMc3tE3bxsVKYqcjjYSEHLweTdQEEISfF OguA== X-Gm-Message-State: AOAM533+ollxf02BAIjqKqkneCRbOntpqL8mAV1kCYYyQh+NujDJ2v6c L4EuBvKKrFZYRTh5DyaA381rdevME2cDosCPGiO+jtg9mqBCIW2Ig9ObW0syzyLcXFJo1gDO8+q G6F4VWbcTB0GElsWTXfk9BwA= X-Received: by 2002:a5d:6405:0:b0:204:1ef:56e8 with SMTP id z5-20020a5d6405000000b0020401ef56e8mr8378175wru.677.1647864106165; Mon, 21 Mar 2022 05:01:46 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwhZuEfJSaXjpaErJyh2L9DkMAaRb0WEaJXZhhj0Z+2/QVCT0rFeZuYjApA/Lz7WeWZRTfZiw== X-Received: by 2002:a5d:6405:0:b0:204:1ef:56e8 with SMTP id z5-20020a5d6405000000b0020401ef56e8mr8378159wru.677.1647864105940; Mon, 21 Mar 2022 05:01:45 -0700 (PDT) Received: from ?IPV6:2003:cb:c704:4900:849b:f76e:5e1f:ff95? (p200300cbc7044900849bf76e5e1fff95.dip0.t-ipconnect.de. [2003:cb:c704:4900:849b:f76e:5e1f:ff95]) by smtp.gmail.com with ESMTPSA id a1-20020a056000188100b002041a652dfdsm1639674wri.25.2022.03.21.05.01.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 21 Mar 2022 05:01:45 -0700 (PDT) Message-ID: Date: Mon, 21 Mar 2022 13:01:44 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [RFC 2/3] mm: export zap_page_range() Content-Language: en-US To: Xiaoguang Wang , 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: David Hildenbrand Organization: Red Hat In-Reply-To: <20220318095531.15479-3-xiaoguang.wang@linux.alibaba.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org 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? -- Thanks, David / dhildenb