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first step toward the new truncate sequence

From:  Christoph Hellwig <hch@lst.de>
To:  viro@zeniv.linux.org.uk, npiggin@suse.de
Subject:  [PATCH 0/6] first step toward the new truncate sequence
Date:  Sun, 30 May 2010 22:49:32 +0200
Cc:  jack@suse.cz, linux-fsdevel@vger.kernel.org

This series is something that I see as the first major step towards
a broad switch to the new truncate sequence.  The patches get rid
of the _newtrunc variant of blockdev_direct_IO & friends and
*_write_begin, and clean up some bits in that area that make the
switch easier.  After this we have all vmtruncate instances except
for inode_setattr in filesystem code.  A second series to deal
with ->setattr will follow and after that we can easily switch
over one filesystem after another.

I think this is still 2.6.34 material as it will make the fs
switches a lot easier and avoid introducing the _newtrunc variants
for one kernel release.
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