linux-kernel - [PATCH 02/14] sched: Re-arrange the {EN,DE}QUEUE flags

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Message-ID: <20250910155808.536785976@infradead.org>
Date: Wed, 10 Sep 2025 17:44:11 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: tj@...nel.org
Cc: linux-kernel@...r.kernel.org,
 peterz@...radead.org,
 mingo@...hat.com,
 juri.lelli@...hat.com,
 vincent.guittot@...aro.org,
 dietmar.eggemann@....com,
 rostedt@...dmis.org,
 bsegall@...gle.com,
 mgorman@...e.de,
 vschneid@...hat.com,
 longman@...hat.com,
 hannes@...xchg.org,
 mkoutny@...e.com,
 void@...ifault.com,
 arighi@...dia.com,
 changwoo@...lia.com,
 cgroups@...r.kernel.org,
 sched-ext@...ts.linux.dev,
 liuwenfang@...or.com,
 tglx@...utronix.de
Subject: [PATCH 02/14] sched: Re-arrange the {EN,DE}QUEUE flags

Ensure the matched flags are in the low word while the unmatched flags
go into the second word.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 kernel/sched/sched.h |   45 ++++++++++++++++++++++++---------------------
 1 file changed, 24 insertions(+), 21 deletions(-)

--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -2337,27 +2337,30 @@ extern const u32		sched_prio_to_wmult[40
  *
  */
 
-#define DEQUEUE_SLEEP		0x01 /* Matches ENQUEUE_WAKEUP */
-#define DEQUEUE_SAVE		0x02 /* Matches ENQUEUE_RESTORE */
-#define DEQUEUE_MOVE		0x04 /* Matches ENQUEUE_MOVE */
-#define DEQUEUE_NOCLOCK		0x08 /* Matches ENQUEUE_NOCLOCK */
-#define DEQUEUE_SPECIAL		0x10
-#define DEQUEUE_MIGRATING	0x100 /* Matches ENQUEUE_MIGRATING */
-#define DEQUEUE_DELAYED		0x200 /* Matches ENQUEUE_DELAYED */
-#define DEQUEUE_THROTTLE	0x800
-
-#define ENQUEUE_WAKEUP		0x01
-#define ENQUEUE_RESTORE		0x02
-#define ENQUEUE_MOVE		0x04
-#define ENQUEUE_NOCLOCK		0x08
-
-#define ENQUEUE_HEAD		0x10
-#define ENQUEUE_REPLENISH	0x20
-#define ENQUEUE_MIGRATED	0x40
-#define ENQUEUE_INITIAL		0x80
-#define ENQUEUE_MIGRATING	0x100
-#define ENQUEUE_DELAYED		0x200
-#define ENQUEUE_RQ_SELECTED	0x400
+#define DEQUEUE_SLEEP		0x0001 /* Matches ENQUEUE_WAKEUP */
+#define DEQUEUE_SAVE		0x0002 /* Matches ENQUEUE_RESTORE */
+#define DEQUEUE_MOVE		0x0004 /* Matches ENQUEUE_MOVE */
+#define DEQUEUE_NOCLOCK		0x0008 /* Matches ENQUEUE_NOCLOCK */
+
+#define DEQUEUE_MIGRATING	0x0010 /* Matches ENQUEUE_MIGRATING */
+#define DEQUEUE_DELAYED		0x0020 /* Matches ENQUEUE_DELAYED */
+
+#define DEQUEUE_SPECIAL		0x00010000
+#define DEQUEUE_THROTTLE	0x00020000
+
+#define ENQUEUE_WAKEUP		0x0001
+#define ENQUEUE_RESTORE		0x0002
+#define ENQUEUE_MOVE		0x0004
+#define ENQUEUE_NOCLOCK		0x0008
+
+#define ENQUEUE_MIGRATING	0x0010
+#define ENQUEUE_DELAYED		0x0020
+
+#define ENQUEUE_HEAD		0x00010000
+#define ENQUEUE_REPLENISH	0x00020000
+#define ENQUEUE_MIGRATED	0x00040000
+#define ENQUEUE_INITIAL		0x00080000
+#define ENQUEUE_RQ_SELECTED	0x00100000
 
 #define RETRY_TASK		((void *)-1UL)