From f4ad3d38d49dc0c4c911e31d8b884d5b74362b6e Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Mon, 15 Dec 2014 12:57:00 +1100
Subject: [PATCH] md: remove unnecessary 'buf' from get_bitmap_file.

'buf' is only used because d_path fills from the end of the
buffer instead of from the start.
We don't need a separate buf to handle that, we just need to use
memmove() to move the string to the start.

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