linux-kernel - [PATCH] sched: remove unused cpumask variable in mm_cid

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Message-Id: <20251009194818.1587650-1-kriish.sharma2006@gmail.com>
Date: Thu,  9 Oct 2025 19:48:18 +0000
From: Kriish Sharma <kriish.sharma2006@...il.com>
To: Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>,
	Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>
Cc: linux-kernel@...r.kernel.org,
	david.hunter.linux@...il.com,
	skhan@...uxfoundation.org,
	Kriish Sharma <kriish.sharma2006@...il.com>
Subject: [PATCH] sched: remove unused cpumask variable in mm_cid_get()

The variable 'cpumask' in mm_cid_get() was assigned but never used,
causing the following build error with -Werror:

kernel/sched/sched.h: In function ‘mm_cid_get’:
kernel/sched/sched.h:3743:25: error: variable ‘cpumask’ set but not used [-Werror=unused-but-set-variable]
 3743 |         struct cpumask *cpumask;
      |                         ^~~~~~~

Removing the unused variable allows the kernel to compile without errors.

Signed-off-by: Kriish Sharma <kriish.sharma2006@...il.com>
---
 kernel/sched/sched.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 1f5d07067f60..361f9101cef9 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -3740,11 +3740,9 @@ static inline int mm_cid_get(struct rq *rq, struct task_struct *t,
 			     struct mm_struct *mm)
 {
 	struct mm_cid __percpu *pcpu_cid = mm->pcpu_cid;
-	struct cpumask *cpumask;
 	int cid;
 
 	lockdep_assert_rq_held(rq);
-	cpumask = mm_cidmask(mm);
 	cid = __this_cpu_read(pcpu_cid->cid);
 	if (mm_cid_is_valid(cid)) {
 		mm_cid_snapshot_time(rq, mm);
-- 
2.34.1