From 60559da4d8c3259ea41a14ca4cfcd83022bff6bd Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Tue, 16 Jul 2013 16:44:29 +1000
Subject: [PATCH] md: don't call md_allow_write in get_bitmap_file.

There is no really need as GFP_NOIO is very likely sufficient,
and failure is not catastrophic.

Calling md_allow_write here will convert a read-auto array to
read/write which could be confusing when you are just performing
a read operation.

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