scftorture: Avoid additional div operation.

Replace "scfp->cpu % nr_cpu_ids" with "cpu". This has been computed
earlier.

Tested-by: Paul E. McKenney <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Reviewed-by: Boqun Feng <[email protected]>
Tested-by: Boqun Feng <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>

Author: Sebastian Andrzej Siewior

kernel/scftorture.c

@@ -463,7 +463,7 @@ static int scftorture_invoker(void *arg)
 
 	// Make sure that the CPU is affinitized appropriately during testing.
 	curcpu = raw_smp_processor_id();
-	WARN_ONCE(curcpu != scfp->cpu % nr_cpu_ids,
+	WARN_ONCE(curcpu != cpu,
 		  "%s: Wanted CPU %d, running on %d, nr_cpu_ids = %d\n",
 		  __func__, scfp->cpu, curcpu, nr_cpu_ids);