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=-6.8 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,URIBL_BLOCKED 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 8A114C352A4 for ; Fri, 7 Feb 2020 20:27:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6222F21775 for ; Fri, 7 Feb 2020 20:27:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="PI4xM+F3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727114AbgBGU1O (ORCPT ); Fri, 7 Feb 2020 15:27:14 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:38759 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727068AbgBGU1M (ORCPT ); Fri, 7 Feb 2020 15:27:12 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1581107231; 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=+PIs0aogCK20rQ10EgLXcJqcuxsHbzkpWoBj+waYkxo=; b=PI4xM+F36IsY8cjLawUB2oWb5EaxZ1HcqszXypZATtSpdpprZKpm7Eg4u018iMjTp84Gkk 9NwR/eaxng9Csacp8MZuKOhJqFfr1ETIj4CHwSesgsKgkoMsP5Badmb/WATXdOHgUPncCk bwV/LSrrg6OXilA8examNsJEgRKl7KA= 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-145-G1LW6OLLO12cioVzd5mrEQ-1; Fri, 07 Feb 2020 15:27:07 -0500 X-MC-Unique: G1LW6OLLO12cioVzd5mrEQ-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C14B2800E21; Fri, 7 Feb 2020 20:27:05 +0000 (UTC) Received: from horse.redhat.com (unknown [10.18.25.35]) by smtp.corp.redhat.com (Postfix) with ESMTP id 14E2C1BC6D; Fri, 7 Feb 2020 20:27:03 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id 9B0742257D6; Fri, 7 Feb 2020 15:27:02 -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 Subject: [PATCH v3 4/7] s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver Date: Fri, 7 Feb 2020 15:26:49 -0500 Message-Id: <20200207202652.1439-5-vgoyal@redhat.com> In-Reply-To: <20200207202652.1439-1-vgoyal@redhat.com> References: <20200207202652.1439-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 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 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