[ 38/70] virtio-blk: Use block layer provided spinlock

3.2-stable review patch. If anyone has any objections, please let me know. -- From: Asias He commit 2c95a3290919541b846bee3e0fbaa75860929f53 upstream. Block layer will allocate a spinlock for the queue if the driver does not provide one in blk_init_queue(). The reason to use

[ 38/70] virtio-blk: Use block layer provided spinlock

3.2-stable review patch. If anyone has any objections, please let me know. -- From: Asias He as...@redhat.com commit 2c95a3290919541b846bee3e0fbaa75860929f53 upstream. Block layer will allocate a spinlock for the queue if the driver does not provide one in blk_init_queue().