virtio_blk: remove BKL leftovers
Remove the BKL usage added in "block: push down BKL into .locked_ioctl". Virtio-blk doesn't use the BKL for anything, and doesn't implement any ioctl command by itself, but only uses the generic scsi_cmd_ioctl which is fine without the BKL. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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