Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966297AbcDLUsR (ORCPT ); Tue, 12 Apr 2016 16:48:17 -0400 Received: from g1t5424.austin.hp.com ([15.216.225.54]:46600 "EHLO g1t5424.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964798AbcDLUsP (ORCPT ); Tue, 12 Apr 2016 16:48:15 -0400 From: Toshi Kani To: akpm@linux-foundation.org, dan.j.williams@intel.com Cc: linux-nvdimm@ml01.01.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Toshi Kani , Alexander Viro , Matthew Wilcox , Ross Zwisler Subject: [PATCH v2 5/5] block: call dax_get_unmapped_area() for DAX pmd mappings Date: Tue, 12 Apr 2016 14:39:32 -0600 Message-Id: <1460493572-31667-4-git-send-email-toshi.kani@hpe.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1460493572-31667-1-git-send-email-toshi.kani@hpe.com> References: <1460493572-31667-1-git-send-email-toshi.kani@hpe.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 968 Lines: 30 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: Alexander Viro Cc: Dan Williams Cc: Matthew Wilcox Cc: Ross Zwisler --- fs/block_dev.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/block_dev.c b/fs/block_dev.c index 20a2c02..0274802 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1798,6 +1798,9 @@ const struct file_operations def_blk_fops = { .write_iter = blkdev_write_iter, .mmap = blkdev_mmap, .fsync = blkdev_fsync, +#ifdef CONFIG_FS_DAX + .get_unmapped_area = dax_get_unmapped_area, +#endif .unlocked_ioctl = block_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = compat_blkdev_ioctl,