netdev - [PATCH 20/33] timers/migration: Remove superfluous cpuset isolation test

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Message-ID: <20251224134520.33231-21-frederic@kernel.org>
Date: Wed, 24 Dec 2025 14:45:07 +0100
From: Frederic Weisbecker <frederic@...nel.org>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Frederic Weisbecker <frederic@...nel.org>,
	Michal Koutný <mkoutny@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Chen Ridong <chenridong@...wei.com>,
	Danilo Krummrich <dakr@...nel.org>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Gabriele Monaco <gmonaco@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jens Axboe <axboe@...nel.dk>,
	Johannes Weiner <hannes@...xchg.org>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Marco Crivellari <marco.crivellari@...e.com>,
	Michal Hocko <mhocko@...e.com>,
	Muchun Song <muchun.song@...ux.dev>,
	Paolo Abeni <pabeni@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Phil Auld <pauld@...hat.com>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Simon Horman <horms@...nel.org>,
	Tejun Heo <tj@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vlastimil Babka <vbabka@...e.cz>,
	Waiman Long <longman@...hat.com>,
	Will Deacon <will@...nel.org>,
	cgroups@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-block@...r.kernel.org,
	linux-mm@...ck.org,
	linux-pci@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH 20/33] timers/migration: Remove superfluous cpuset isolation test

Cpuset isolated partitions are now included in HK_TYPE_DOMAIN. Testing
if a CPU is part of an isolated partition alone is now useless.

Remove the superflous test.

Signed-off-by: Frederic Weisbecker <frederic@...nel.org>
---
 kernel/time/timer_migration.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/time/timer_migration.c b/kernel/time/timer_migration.c
index 3879575a4975..6da9cd562b20 100644
--- a/kernel/time/timer_migration.c
+++ b/kernel/time/timer_migration.c
@@ -466,9 +466,8 @@ static inline bool tmigr_is_isolated(int cpu)
 {
 	if (!static_branch_unlikely(&tmigr_exclude_isolated))
 		return false;
-	return (!housekeeping_cpu(cpu, HK_TYPE_DOMAIN) ||
-		cpuset_cpu_is_isolated(cpu)) &&
-	       housekeeping_cpu(cpu, HK_TYPE_KERNEL_NOISE);
+	return (!housekeeping_cpu(cpu, HK_TYPE_DOMAIN) &&
+		housekeeping_cpu(cpu, HK_TYPE_KERNEL_NOISE));
 }
 
 /*
-- 
2.51.1