linux-kernel - [PATCH 5.10 042/236] sched/numa: Fix is_core

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Date:   Mon, 13 Sep 2021 15:12:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Mika Penttilä <mika.penttila@...il.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Pankaj Gupta <pankaj.gupta@...os.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 042/236] sched/numa: Fix is_core_idle()

From: Mika Penttilä <mika.penttila@...il.com>

[ Upstream commit 1c6829cfd3d5124b125e6df41158665aea413b35 ]

Use the loop variable instead of the function argument to test the
other SMT siblings for idle.

Fixes: ff7db0bf24db ("sched/numa: Prefer using an idle CPU as a migration target instead of comparing tasks")
Signed-off-by: Mika Penttilä <mika.penttila@...il.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Mel Gorman <mgorman@...hsingularity.net>
Acked-by: Pankaj Gupta <pankaj.gupta@...os.com>
Link: https://lkml.kernel.org/r/20210722063946.28951-1-mika.penttila@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 kernel/sched/fair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index bad97d35684d..c004e3b89c32 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1533,7 +1533,7 @@ static inline bool is_core_idle(int cpu)
 		if (cpu == sibling)
 			continue;
 
-		if (!idle_cpu(cpu))
+		if (!idle_cpu(sibling))
 			return false;
 	}
 #endif
-- 
2.30.2