From: NeilBrown <neilb@suse.de>
Date: Mon, 15 Dec 2014 01:57:00 +0000 (+1100)
Subject: md: move GET_BITMAP_FILE ioctl out from mddev_lock.
X-Git-Tag: fixes-v4.0-rc1~120^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4af1a04176bdb4688aa14f6c10d1d5131c036a9d;p=pandora-kernel.git

md: move GET_BITMAP_FILE ioctl out from mddev_lock.

It makes more sense to report bitmap_info->file, rather than
bitmap->file (the later is only available once the array is
active).

With that change, use mddev->lock to protect bitmap_info being
set to NULL, and we can call get_bitmap_file() without taking
the mutex.

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

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