From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Cc: Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1 1/1] sched: Remove never used code in mm_cid_get()
Date: Wed, 15 Oct 2025 11:19:34 +0200 [thread overview]
Message-ID: <20251015091935.2977229-1-andriy.shevchenko@linux.intel.com> (raw)
Clang is not happy with set but unused variable (this is visible
with `make W=1` build:
kernel/sched/sched.h:3744:18: error: variable 'cpumask' set but not used [-Werror,-Wunused-but-set-variable]
It seems like the variable was never be used along with the assignment that
does not have side effects as far as I can see. Remove those altogether.
Fixes: 223baf9d17f2 ("sched: Fix performance regression introduced by mm_cid")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.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);
--
2.50.1
next reply other threads:[~2025-10-15 9:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-15 9:19 Andy Shevchenko [this message]
2025-10-20 10:10 ` [PATCH v1 1/1] sched: Remove never used code in mm_cid_get() Andy Shevchenko
2025-10-20 10:49 ` Peter Zijlstra
2025-10-22 16:46 ` Andy Shevchenko
2025-10-24 21:19 ` Eric Biggers
2025-10-24 23:56 ` Linus Torvalds
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