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From: Christoph Hellwig <hch@lst.de>
To: viro@ZenIV.linux.org.uk
Cc: linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org
Subject: add RWF_(D)SYNC flag to preadv2/pwritev2 V2
Date: Thu,  7 Apr 2016 08:51:54 -0700
Message-Id: <1460044324-5298-1-git-send-email-hch@lst.de>
Sender: linux-fsdevel-owner@vger.kernel.org
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Add per-I/O sync flags, which are very useful for all kinds of file servers
or storage targets.  To properly do this refactor lots of direct I/O code
to not pass pointless argument, which makes the whole series a net negative
in terms of lines of code.

Changes since V1:
 - fix RWF_SYNC defintion
 - fix a comment