From: NeilBrown <neilb@suse.de>
Date: Tue, 26 May 2009 02:41:08 +0000 (+1000)
Subject: md: raid5: avoid sector values going negative when testing reshape progress.
X-Git-Tag: v2.6.30-rc8~58^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=848b3182365fdf5a05bcd5ed949071cac2c894b3;p=pandora-kernel.git

md: raid5: avoid sector values going negative when testing reshape progress.

As sector_t in unsigned, we cannot afford to let 'safepos' etc go
negative.
So replace
   a -= b;
by
   a -= min(b,a);

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

Reading git-diff-tree failed