linux-kernel - [tip: sched/core] sched/topology: Remove redundant cpumask_and() in init_overlap_sched

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Message-ID: <161667051732.398.15690730249125096642.tip-bot2@tip-bot2>
Date:   Thu, 25 Mar 2021 11:08:37 -0000
From:   "tip-bot2 for Barry Song" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Barry Song <song.bao.hua@...ilicon.com>,
        Ingo Molnar <mingo@...nel.org>,
        Valentin Schneider <Valentin.Schneider@....com>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: sched/core] sched/topology: Remove redundant cpumask_and() in
 init_overlap_sched_group()

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     0a2b65c03e9b47493e1442bf9c84badc60d9bffb
Gitweb:        https://git.kernel.org/tip/0a2b65c03e9b47493e1442bf9c84badc60d9bffb
Author:        Barry Song <song.bao.hua@...ilicon.com>
AuthorDate:    Thu, 25 Mar 2021 15:31:40 +13:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Thu, 25 Mar 2021 11:41:23 +01:00

sched/topology: Remove redundant cpumask_and() in init_overlap_sched_group()

mask is built in build_balance_mask() by for_each_cpu(i, sg_span), so
it must be a subset of sched_group_span(sg).

So the cpumask_and() call is redundant - remove it.

[ mingo: Adjusted the changelog a bit. ]

Signed-off-by: Barry Song <song.bao.hua@...ilicon.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Reviewed-by: Valentin Schneider <Valentin.Schneider@....com>
Link: https://lore.kernel.org/r/20210325023140.23456-1-song.bao.hua@hisilicon.com
---
 kernel/sched/topology.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index f2066d6..d1aec24 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -934,7 +934,7 @@ static void init_overlap_sched_group(struct sched_domain *sd,
 	int cpu;
 
 	build_balance_mask(sd, sg, mask);
-	cpu = cpumask_first_and(sched_group_span(sg), mask);
+	cpu = cpumask_first(mask);
 
 	sg->sgc = *per_cpu_ptr(sdd->sgc, cpu);
 	if (atomic_inc_return(&sg->sgc->ref) == 1)