tree 978bdc35cce2405bacc44ad9e747e2c97143ce6f
parent 1e594bb24d3d08fe4a8afa0fc45a61d6109130fa
author NeilBrown <neilb@suse.de> 1418608620 +1100
committer NeilBrown <neilb@suse.de> 1423175576 +1100

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>