From: NeilBrown <neilb@cse.unsw.edu.au>
Date: Fri, 9 Sep 2005 23:23:50 +0000 (-0700)
Subject: [PATCH] md: allow hot-adding devices to arrays with non-persistant superblocks.
X-Git-Tag: v2.6.14-rc1~243
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b1e35f6d666693e8f376ce02242efca3ec09aaf;p=pandora-kernel.git

[PATCH] md: allow hot-adding devices to arrays with non-persistant superblocks.

It is possibly (and occasionally useful) to have a raid1 without persistent
superblocks.  The code in add_new_disk for adding a device to such an array
always tries to read a superblock.

This will obviously fail.

So do the appropriate test and call md_import_device with
appropriate args.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

Reading git-diff-tree failed