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由 Bart Van Assche 提交于
A later patch will call blk_freeze_queue_start() followed by blk_mq_unfreeze_queue() without waiting for q_usage_counter to drop to zero. Make sure that this doesn't cause a kernel warning to appear by switching from percpu_ref_reinit() to percpu_ref_resurrect(). The former namely requires that the refcount it operates on is zero. Signed-off-by: NBart Van Assche <bvanassche@acm.org> Reviewed-by: NMing Lei <ming.lei@redhat.com> Reviewed-by: NChristoph Hellwig <hch@lst.de> Cc: Jianchao Wang <jianchao.w.wang@oracle.com> Cc: Hannes Reinecke <hare@suse.com> Cc: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: NJens Axboe <axboe@kernel.dk>
bdd63160