From a79cfe12c619aa0fc401f9148d78faa6fc61a331 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Mon, 2 Feb 2015 11:37:59 +1100
Subject: [PATCH] md/raid5: separate out the easy conditions in
 need_this_block.

Some of the conditions in need_this_block have very straight
forward motivation.  Separate those out and document them.

Signed-off-by: NeilBrown <neilb@suse.de>
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Reading git-format-patch failed