nvme: switch abort_limit to an atomic_t
There is no lock to sychronize access to the abort_limit field of struct nvme_ctrl, so switch it to an atomic_t. Signed-off-by:Christoph Hellwig <hch@lst.de> Signed-off-by:
Keith Busch <keith.busch@intel.com> Signed-off-by:
Jens Axboe <axboe@fb.com>
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