blk-mq: check on cpu id when there is only one ctx mapping

[Bart Van Assche]

On 5/31/23 01:38, Ed Tsai wrote:
> commit f168420 ("blk-mq: don't redirect completion for hctx withs only
> one ctx mapping") When nvme applies a 1:1 mapping of hctx and ctx, there
> will be no remote request.

The above sentence is incomprehensible. Please make it comprehensible.

> Signed-off-by: Ed Tsai <ed.tsai at mediatek.com>
> Signed-off-by: Po-Wen Kao <powen.kao at mediatek.com>

This patch comes from Keith Busch. Why has his name not been mentioned? 
See also 
https://lore.kernel.org/linux-block/ZHY2TUrKVBj2xGE2@kbusch-mbp.dhcp.thefacebook.com/.

Bart.