nvmet: use unlikely for req status check

This patch adds unlikely in the nvmet request completion path for the status check in the low level function __nvmet_req_complete. This is helpful in the scenario where host and target connection is working smoothly.

---
 drivers/nvme/target/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index e3e158ff207a..ac98e9212274 100644
@@ -602,7 +602,7 @@ static void __nvmet_req_complete(struct nvmet_req *req, u16 status)
 	u32 old_sqhd, new_sqhd;
 	u16 sqhd;
 
-	if (status)
+	if (unlikely(status))
 		nvmet_set_status(req, status);
 
 	if (req->sq->size) {

2.17.0

Thanks,

applied to nvme-4.21.