From: Mike Snitzer <snitzer@redhat.com>
Date: Fri, 27 Jul 2012 14:08:00 +0000 (+0100)
Subject: dm: support non power of two target max_io_len
X-Git-Tag: v3.6-rc1~56^2~51
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=542f90381422676544382d4071ba44a2de90a0c1;p=pandora-kernel.git

dm: support non power of two target max_io_len

Remove the restriction that limits a target's specified maximum incoming
I/O size to be a power of 2.

Rename this setting from 'split_io' to the less-ambiguous 'max_io_len'.
Change it from sector_t to uint32_t, which is plenty big enough, and
introduce a wrapper function dm_set_target_max_io_len() to set it.
Use sector_div() to process it now that it is not necessarily a power of 2.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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