From: Paul E. McKenney <paulmck@kernel.org>
Date: Fri, 3 Jul 2020 22:23:19 +0000 (-0700)
Subject: scftorture: Adapt memory-ordering test to UP operation
X-Git-Tag: v5.15~2632^2^2~2^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9e66bf03f9c538863e614a72c5799bcd9579630e;p=platform%2Fkernel%2Flinux-starfive.git

scftorture: Adapt memory-ordering test to UP operation

On uniprocessor systems, smp_call_function() does nothing.  This commit
therefore avoids complaining about the lack of handler accesses in the
single-CPU case where there is no handler.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---

diff --git a/kernel/scftorture.c b/kernel/scftorture.c
index 04d3a42..fc22bcc 100644
--- a/kernel/scftorture.c
+++ b/kernel/scftorture.c
@@ -363,7 +363,8 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
 			scfcp->scfc_out = true;
 	}
 	if (scfcp && scfsp->scfs_wait) {
-		if (WARN_ON_ONCE(!scfcp->scfc_out))
+		if (WARN_ON_ONCE((num_online_cpus() > 1 || scfsp->scfs_prim == SCF_PRIM_SINGLE) &&
+				 !scfcp->scfc_out))
 			atomic_inc(&n_mb_out_errs); // Leak rather than trash!
 		else
 			kfree(scfcp);