linux-kernel - [PATCH] sched: simplify sched_init

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Message-ID: <20250719210753.401129-1-yury.norov@gmail.com>
Date: Sat, 19 Jul 2025 17:07:51 -0400
From: Yury Norov <yury.norov@...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>,
	linux-kernel@...r.kernel.org
Cc: Yury Norov <yury.norov@...il.com>
Subject: [PATCH] sched: simplify sched_init_numa()

From: Yury Norov (NVIDIA) <yury.norov@...il.com>

The function opencodes for_each_set_bit() macro.

Signed-off-by: Yury Norov (NVIDIA) <yury.norov@...il.com>
---
 kernel/sched/topology.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index b958fe48e020..7dc3c79aa480 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -1932,10 +1932,9 @@ void sched_init_numa(int offline_node)
 		return;
 	}
 
-	for (i = 0, j = 0; i < nr_levels; i++, j++) {
-		j = find_next_bit(distance_map, NR_DISTANCE_VALUES, j);
-		distances[i] = j;
-	}
+	for_each_set_bit(j, distance_map, NR_DISTANCE_VALUES)
+		distances[i++] = j;
+
 	rcu_assign_pointer(sched_domains_numa_distance, distances);
 
 	bitmap_free(distance_map);
-- 
2.43.0