[PATCH 0/4] xfs_log_write cleanups and vector support

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

As mention during the review of the first posting of the transaction
subsystem cleanup series I really didn't like the concept of mixing
the xfs_log_write cleanup with adding the new vector functionality.

Here's a patch series to reshuffle this work into a series that I
feel able to follow and throw in some minimal additional cleanups.

First patch is the factoring out of helpers from xlog_write without
functionality change, second is a re-indent of xlog_write including
moving variable declaration to inner blocks, again without functionality
change, third is the introduction of the log vectors, including the
relatively small changes in xlog_write, and fourth is a small incremental
cleanup patch.