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 X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 182AEC3404D for ; Tue, 18 Feb 2020 21:49:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DF814206E2 for ; Tue, 18 Feb 2020 21:49:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="bwAmmk/t" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727993AbgBRVtD (ORCPT ); Tue, 18 Feb 2020 16:49:03 -0500 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:37835 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727979AbgBRVtC (ORCPT ); Tue, 18 Feb 2020 16:49:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582062541; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cnevXfGVEDsFBctQatqNzlbLF8HNLGY3ShXMHssDWiQ=; b=bwAmmk/tRY0QIF0C3xm6HscuO56L73fIUB2b0EsdS0AsMjWfVeT8zo1ZactK4sU5HjRdwQ ADhxNpmCEE6oBU8+oSZ5cBY8hElATqT5FUYUkfhlLirnaUUDhHydiGtDYUwuMUku6LF4ar 5jPIYHOFaVNdjWRFmgmVJSiPWd7jgKM= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-405-_qRODWZyNFm7pCqRV7mn4w-1; Tue, 18 Feb 2020 16:48:57 -0500 X-MC-Unique: _qRODWZyNFm7pCqRV7mn4w-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6AE20190B2AB; Tue, 18 Feb 2020 21:48:56 +0000 (UTC) Received: from horse.redhat.com (unknown [10.18.25.35]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4557D90089; Tue, 18 Feb 2020 21:48:56 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id AE6712257D7; Tue, 18 Feb 2020 16:48:52 -0500 (EST) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org, hch@infradead.org, dan.j.williams@intel.com Cc: dm-devel@redhat.com, vishal.l.verma@intel.com, vgoyal@redhat.com, linux-s390@vger.kernel.org, Gerald Schaefer Subject: [PATCH v5 5/8] s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver Date: Tue, 18 Feb 2020 16:48:38 -0500 Message-Id: <20200218214841.10076-6-vgoyal@redhat.com> In-Reply-To: <20200218214841.10076-1-vgoyal@redhat.com> References: <20200218214841.10076-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Content-Transfer-Encoding: quoted-printable Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Add dax operation zero_page_range for dcssblk driver. CC: linux-s390@vger.kernel.org Suggested-by: Christoph Hellwig Reviewed-by: Gerald Schaefer Signed-off-by: Vivek Goyal --- drivers/s390/block/dcssblk.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 63502ca537eb..331abab5d066 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -57,11 +57,28 @@ static size_t dcssblk_dax_copy_to_iter(struct dax_dev= ice *dax_dev, return copy_to_iter(addr, bytes, i); } =20 +static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev, u64 o= ffset, + size_t len) +{ + long rc; + void *kaddr; + pgoff_t pgoff =3D offset >> PAGE_SHIFT; + unsigned page_offset =3D offset_in_page(offset); + + rc =3D dax_direct_access(dax_dev, pgoff, 1, &kaddr, NULL); + if (rc < 0) + return rc; + memset(kaddr + page_offset, 0, len); + dax_flush(dax_dev, kaddr + page_offset, len); + return 0; +} + static const struct dax_operations dcssblk_dax_ops =3D { .direct_access =3D dcssblk_dax_direct_access, .dax_supported =3D generic_fsdax_supported, .copy_from_iter =3D dcssblk_dax_copy_from_iter, .copy_to_iter =3D dcssblk_dax_copy_to_iter, + .zero_page_range =3D dcssblk_dax_zero_page_range, }; =20 struct dcssblk_dev_info { --=20 2.20.1