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From:   Toshi Kani <toshi.kani@hpe.com>
To:     jack@suse.cz, dan.j.williams@intel.com
Cc:     tytso@mit.edu, adilger.kernel@dilger.ca,
        linux-ext4@vger.kernel.org, linux-nvdimm@lists.01.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] fix sync to flush processor cache for ext4 DAX files
Date:   Tue, 11 Sep 2018 09:42:44 -0600
Message-Id: <20180911154246.6844-1-toshi.kani@hpe.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

This patchset fixes an issue that sync syscall to an existing DAX file
does not flush processor cache.

Patch 1/2 adds a check to skip the journal inode. It's a bit awkward,
but I could not find a beter way to get the journal inode.

Patch 2/2 fixes the issue by moving up ext4_set_inode_flags() before
ext4_set_aops() in ext4_iget(). This assumes updated i_flags is harmless
in the error cases after the moved-up ext4_set_inode_flags(). Please
review.

---
Toshi Kani (2):
 1/2 ext4, dax: update dax check to skip journal inode
 2/2 ext4, dax: set ext4_dax_aops for dax files

---
 fs/ext4/ext4_jbd2.h | 8 ++++++++
 fs/ext4/inode.c     | 5 ++++-
 2 files changed, 12 insertions(+), 1 deletion(-)