NVMe: Simplify queue lookup
Fill in all the num_possible_cpus() entries with duplicate pointers. This reduces the complexity of the frequently-called get_nvmeq(), as well as avoiding a bug in it when there are fewer queues than CPUs. Reported-by: NShane Michael Matthews <shane.matthews@intel.com> Signed-off-by: NMatthew Wilcox <matthew.r.wilcox@intel.com>
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