linux-kernel - [PATCH 1/1] sched/headers: remove double

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Message-Id: <20220329130539.568762-1-wangjianxing@loongson.cn>
Date:   Tue, 29 Mar 2022 21:05:38 +0800
From:   Jianxing Wang <wangjianxing@...ngson.cn>
To:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com
Cc:     linux-kernel@...r.kernel.org,
        Jianxing Wang <wangjianxing@...ngson.cn>,
        Mike Galbraith <bitbucket@...ine.de>
Subject: [PATCH 1/1] sched/headers: remove double_lock function

commit 8c8a743c5087b ("sched/numa: Use {cpu, pid} to create task groups
for shared faults") import double_lock but
commit 60e69eed85bb ("sched/numa: Fix task_numa_free() lockdep splat")
replace it with double_lock_irq, now nobody care it, just remove it.

Cc: Mike Galbraith <bitbucket@...ine.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Signed-off-by: Jianxing Wang <wangjianxing@...ngson.cn>
---
 kernel/sched/sched.h | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 58263f90c559..f8ca414177bd 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -2586,15 +2586,6 @@ static inline void double_unlock_balance(struct rq *this_rq, struct rq *busiest)
 	lock_set_subclass(&__rq_lockp(this_rq)->dep_map, 0, _RET_IP_);
 }
 
-static inline void double_lock(spinlock_t *l1, spinlock_t *l2)
-{
-	if (l1 > l2)
-		swap(l1, l2);
-
-	spin_lock(l1);
-	spin_lock_nested(l2, SINGLE_DEPTH_NESTING);
-}
-
 static inline void double_lock_irq(spinlock_t *l1, spinlock_t *l2)
 {
 	if (l1 > l2)
-- 
2.31.1