drivers/block/loop.c: emit uevent on auto release
The loopback driver failed to emit the change uevent when auto releasing the device. Fixed lo_release() to pass the bdev to loop_clr_fd() so it can emit the event. Signed-off-by: NPhillip Susi <psusi@cfl.rr.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Ayan George <ayan@ayan.net> Signed-off-by: NAndrew Morton <akpm@google.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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