loop: replace linked list of allocated devices with an idr index

Replace the linked list, that keeps track of allocated devices, with an
idr index to allow a more efficient lookup of devices.

Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/linux/loop.h b/include/linux/loop.h
index 66c194e2d9b9..5f08d18fa148 100644
--- a/include/linux/loop.h
+++ b/include/linux/loop.h
@@ -64,7 +64,6 @@ struct loop_device {
 
         struct request_queue    *lo_queue;
         struct gendisk          *lo_disk;
-        struct list_head        lo_list;
 };
 
 #endif /* __KERNEL__ */