linux-kernel - [PATCH 08/11] scftorture: Remove preempt_disable in scftorture_invoke

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Message-Id: <20260203112401.3889029-9-zhouchuyi@bytedance.com>
Date: Tue,  3 Feb 2026 19:23:58 +0800
From: "Chuyi Zhou" <zhouchuyi@...edance.com>
To: <tglx@...utronix.de>, <mingo@...hat.com>, <luto@...nel.org>, 
	<peterz@...radead.org>, <paulmck@...nel.org>, <muchun.song@...ux.dev>, 
	<bp@...en8.de>, <dave.hansen@...ux.intel.com>
Cc: <linux-kernel@...r.kernel.org>, "Chuyi Zhou" <zhouchuyi@...edance.com>
Subject: [PATCH 08/11] scftorture: Remove preempt_disable in scftorture_invoke_one

Now we no longer need explicit preempt_disable calls before smp_call_*(),
because the smp_call*() internally handle preemption logic themselves.
Remove preempt_{enable, disable} in scftorture_invoke_one.

Signed-off-by: Chuyi Zhou <zhouchuyi@...edance.com>
---
 kernel/scftorture.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/kernel/scftorture.c b/kernel/scftorture.c
index d86d2d9c4624..3fb1742f3129 100644
--- a/kernel/scftorture.c
+++ b/kernel/scftorture.c
@@ -364,8 +364,6 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
 	}
 	if (use_cpus_read_lock)
 		cpus_read_lock();
-	else
-		preempt_disable();
 	switch (scfsp->scfs_prim) {
 	case SCF_PRIM_RESCHED:
 		if (IS_BUILTIN(CONFIG_SCF_TORTURE_TEST)) {
@@ -411,13 +409,10 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
 		if (!ret) {
 			if (use_cpus_read_lock)
 				cpus_read_unlock();
-			else
-				preempt_enable();
+
 			wait_for_completion(&scfcp->scfc_completion);
 			if (use_cpus_read_lock)
 				cpus_read_lock();
-			else
-				preempt_disable();
 		} else {
 			scfp->n_single_rpc_ofl++;
 			scf_add_to_free_list(scfcp);
@@ -463,8 +458,6 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
 	}
 	if (use_cpus_read_lock)
 		cpus_read_unlock();
-	else
-		preempt_enable();
 	if (allocfail)
 		schedule_timeout_idle((1 + longwait) * HZ);  // Let no-wait handlers complete.
 	else if (!(torture_random(trsp) & 0xfff))
-- 
2.20.1