commit b3546035277847028df650b147469fc943cf5c71
author NeilBrown <neilb@suse.de> Tue Mar 31 14:56:41 2009 +1100
committer NeilBrown <neilb@suse.de> Tue Mar 31 14:56:41 2009 +1100
tree 87966abc5456a62845326eb8d5a5cf0f88879b2d
parent d562b0c4313e3ddea402a400371afa47ddf679f9

md/raid5: allow layout/chunksize to be changed on an active 2-drive raid5.

2-drive raid5's aren't very interesting.  But if you are converting
a raid1 into a raid5, you will at least temporarily have one.  And
that it a good time to set the layout/chunksize for the new RAID5
if you aren't happy with the defaults.

layout and chunksize don't actually affect the placement of data
on a 2-drive raid5, so we just do some internal book-keeping.

Signed-off-by: NeilBrown <neilb@suse.de>