Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755551AbcDNQ5b (ORCPT ); Thu, 14 Apr 2016 12:57:31 -0400 Received: from g1t5425.austin.hp.com ([15.216.225.55]:39475 "EHLO g1t5425.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030232AbcDNQ51 (ORCPT ); Thu, 14 Apr 2016 12:57:27 -0400 From: Toshi Kani To: akpm@linux-foundation.org, dan.j.williams@intel.com, viro@zeniv.linux.org.uk Cc: willy@linux.intel.com, ross.zwisler@linux.intel.com, kirill.shutemov@linux.intel.com, david@fromorbit.com, jack@suse.cz, tytso@mit.edu, adilger.kernel@dilger.ca, linux-nvdimm@ml01.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Toshi Kani Subject: [PATCH v3 2/2] ext2/4, xfs, blk: call dax_get_unmapped_area() for DAX pmd mappings Date: Thu, 14 Apr 2016 10:48:31 -0600 Message-Id: <1460652511-19636-3-git-send-email-toshi.kani@hpe.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1460652511-19636-1-git-send-email-toshi.kani@hpe.com> References: <1460652511-19636-1-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: 2500 Lines: 73 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: Andrew Morton Cc: Alexander Viro Cc: Dan Williams Cc: Matthew Wilcox Cc: Ross Zwisler Cc: Kirill A. Shutemov Cc: Dave Chinner Cc: Jan Kara Cc: Theodore Ts'o Cc: Andreas Dilger --- fs/block_dev.c | 1 + fs/ext2/file.c | 1 + fs/ext4/file.c | 1 + fs/xfs/xfs_file.c | 1 + 4 files changed, 4 insertions(+) diff --git a/fs/block_dev.c b/fs/block_dev.c index 20a2c02..52518e0 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1798,6 +1798,7 @@ const struct file_operations def_blk_fops = { .write_iter = blkdev_write_iter, .mmap = blkdev_mmap, .fsync = blkdev_fsync, + .get_unmapped_area = dax_get_unmapped_area, .unlocked_ioctl = block_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = compat_blkdev_ioctl, diff --git a/fs/ext2/file.c b/fs/ext2/file.c index c1400b1..dbf11eb 100644 --- a/fs/ext2/file.c +++ b/fs/ext2/file.c @@ -172,6 +172,7 @@ const struct file_operations ext2_file_operations = { .open = dquot_file_open, .release = ext2_release_file, .fsync = ext2_fsync, + .get_unmapped_area = dax_get_unmapped_area, .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, }; diff --git a/fs/ext4/file.c b/fs/ext4/file.c index fa2208b..6c268f8 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -708,6 +708,7 @@ const struct file_operations ext4_file_operations = { .open = ext4_file_open, .release = ext4_release_file, .fsync = ext4_sync_file, + .get_unmapped_area = dax_get_unmapped_area, .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, .fallocate = ext4_fallocate, diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 569938a..1e409a6 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1708,6 +1708,7 @@ const struct file_operations xfs_file_operations = { .open = xfs_file_open, .release = xfs_file_release, .fsync = xfs_file_fsync, + .get_unmapped_area = dax_get_unmapped_area, .fallocate = xfs_file_fallocate, };