scsi: core: introduce force_blk_mq
This patch introduces 'force_blk_mq' to the scsi_host_template so that drivers that have no desire to support the legacy I/O path can signal blk-mq only support. [mkp: commit desc] Cc: Omar Sandoval <osandov@fb.com>, Cc: "Martin K. Petersen" <martin.petersen@oracle.com>, Cc: James Bottomley <james.bottomley@hansenpartnership.com>, Cc: Christoph Hellwig <hch@lst.de>, Cc: Don Brace <don.brace@microsemi.com> Cc: Kashyap Desai <kashyap.desai@broadcom.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: Laurence Oberman <loberman@redhat.com> Signed-off-by: NMing Lei <ming.lei@redhat.com> Reviewed-by: NHannes Reinecke <hare@suse.de> Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
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