linux-kernel - [PATCH v2 2/4] smp: Use cpumask_any_but() in smp_call_function_many

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Message-ID: <20250623000010.10124-3-yury.norov@gmail.com>
Date: Sun, 22 Jun 2025 20:00:07 -0400
From: Yury Norov <yury.norov@...il.com>
To: "Paul E. McKenney" <paulmck@...nel.org>,
	Neeraj Upadhyay <neeraj.upadhyay@...nel.org>,
	"Yury Norov [NVIDIA]" <yury.norov@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Thorsten Blum <thorsten.blum@...ux.dev>,
	Zqiang <qiang.zhang1211@...il.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/4] smp: Use cpumask_any_but() in smp_call_function_many_cond()

From: "Yury Norov [NVIDIA]" <yury.norov@...il.com>

smp_call_function_many_cond() opencodes cpumask_any_but().

Signed-off-by: Yury Norov [NVIDIA] <yury.norov@...il.com>
---
 kernel/smp.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/kernel/smp.c b/kernel/smp.c
index 7c8cfab0ce55..5871acf3cd45 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -807,13 +807,8 @@ static void smp_call_function_many_cond(const struct cpumask *mask,
 		run_local = true;
 
 	/* Check if we need remote execution, i.e., any CPU excluding this one. */
-	cpu = cpumask_first_and(mask, cpu_online_mask);
-	if (cpu == this_cpu)
-		cpu = cpumask_next_and(cpu, mask, cpu_online_mask);
-	if (cpu < nr_cpu_ids)
+	if (cpumask_any_and_but(mask, cpu_online_mask, this_cpu) < nr_cpu_ids) {
 		run_remote = true;
-
-	if (run_remote) {
 		cfd = this_cpu_ptr(&cfd_data);
 		cpumask_and(cfd->cpumask, mask, cpu_online_mask);
 		__cpumask_clear_cpu(this_cpu, cfd->cpumask);
-- 
2.43.0