linux-kernel - [PATCH 04/46] sched_ext: Use bitfields for boolean warning flags

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Message-ID: <20250920005931.2753828-5-tj@kernel.org>
Date: Fri, 19 Sep 2025 14:58:27 -1000
From: Tejun Heo <tj@...nel.org>
To: void@...ifault.com,
	arighi@...dia.com,
	multics69@...il.com
Cc: linux-kernel@...r.kernel.org,
	sched-ext@...ts.linux.dev,
	memxor@...il.com,
	bpf@...r.kernel.org,
	Tejun Heo <tj@...nel.org>
Subject: [PATCH 04/46] sched_ext: Use bitfields for boolean warning flags

Convert warned_zero_slice and warned_deprecated_rq in scx_sched struct to
single-bit bitfields to reduce struct size.

Signed-off-by: Tejun Heo <tj@...nel.org>
---
 kernel/sched/ext_internal.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/ext_internal.h b/kernel/sched/ext_internal.h
index 2e289931e567..1a80d01b1f0c 100644
--- a/kernel/sched/ext_internal.h
+++ b/kernel/sched/ext_internal.h
@@ -871,8 +871,8 @@ struct scx_sched {
 	struct scx_dispatch_q	**global_dsqs;
 	struct scx_sched_pcpu __percpu *pcpu;
 
-	bool			warned_zero_slice;
-	bool			warned_deprecated_rq;
+	bool			warned_zero_slice:1;
+	bool			warned_deprecated_rq:1;
 
 	atomic_t		exit_kind;
 	struct scx_exit_info	*exit_info;
-- 
2.51.0