From patchwork Tue Apr 12 20:39:29 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kani, Toshi" X-Patchwork-Id: 8815241 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0D055C0553 for ; Tue, 12 Apr 2016 20:50:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 333942035D for ; Tue, 12 Apr 2016 20:50:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4997420374 for ; Tue, 12 Apr 2016 20:50:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966263AbcDLUsO (ORCPT ); Tue, 12 Apr 2016 16:48:14 -0400 Received: from g9t1613g.houston.hp.com ([15.240.0.71]:41196 "EHLO g9t1613g.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964798AbcDLUsN (ORCPT ); Tue, 12 Apr 2016 16:48:13 -0400 Received: from g1t5425.austin.hp.com (g1t5425.austin.hp.com [15.216.225.55]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by g9t1613g.houston.hp.com (Postfix) with ESMTPS id 8B78E6180F; Tue, 12 Apr 2016 20:48:07 +0000 (UTC) Received: from g2t2360.austin.hpecorp.net (g2t2360.austin.hpecorp.net [16.196.225.135]) by g1t5425.austin.hp.com (Postfix) with ESMTP id D1C634D; Tue, 12 Apr 2016 20:48:05 +0000 (UTC) Received: from misato.fc.hp.com (misato.fc.hp.com [16.78.168.61]) by g2t2360.austin.hpecorp.net (Postfix) with ESMTP id E4FA357; Tue, 12 Apr 2016 20:48:04 +0000 (UTC) From: Toshi Kani To: akpm@linux-foundation.org, dan.j.williams@intel.com Cc: linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Toshi Kani , Theodore Ts'o , Andreas Dilger , Jan Kara , Matthew Wilcox , Ross Zwisler , Subject: [PATCH v2 2/5] ext4: call dax_get_unmapped_area() for DAX pmd mappings Date: Tue, 12 Apr 2016 14:39:29 -0600 Message-Id: <1460493572-31667-1-git-send-email-toshi.kani@hpe.com> X-Mailer: git-send-email 2.5.5 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP To support DAX pmd mappings with unmodified applications, filesystems need to align an mmap address by the pmd size. Call dax_get_unmapped_area() from f_op->get_unmapped_area. Note, there is no change in behavior for a non-DAX file. Signed-off-by: Toshi Kani Cc: Theodore Ts'o Cc: Andreas Dilger Cc: Jan Kara Cc: Dan Williams Cc: Matthew Wilcox Cc: Ross Zwisler Cc: --- fs/ext4/file.c | 3 +++ 1 file changed, 3 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/fs/ext4/file.c b/fs/ext4/file.c index fa2208b..2abc57b 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -708,6 +708,9 @@ const struct file_operations ext4_file_operations = { .open = ext4_file_open, .release = ext4_release_file, .fsync = ext4_sync_file, +#ifdef CONFIG_FS_DAX + .get_unmapped_area = dax_get_unmapped_area, +#endif .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, .fallocate = ext4_fallocate,