From: Ingo Molnar <mingo@kernel.org>
Date: Wed, 26 Nov 2025 04:31:28 +0000 (+0100)
Subject: sched/fair: Separate se->vlag from se->vprot
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=80390ead2080071cbd6f427ff8deb94d10a4a50f;p=thirdparty%2Fkernel%2Flinux.git

sched/fair: Separate se->vlag from se->vprot

There's no real space concerns here and keeping these fields
in a union makes reading (and tracing) the scheduler code harder.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://patch.msgid.link/20251201064647.1851919-4-mingo@kernel.org
---

diff --git a/include/linux/sched.h b/include/linux/sched.h
index d395f2810facb..bf96a7d595e22 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -586,15 +586,10 @@ struct sched_entity {
 	u64				sum_exec_runtime;
 	u64				prev_sum_exec_runtime;
 	u64				vruntime;
-	union {
-		/*
-		 * When !@on_rq this field is vlag.
-		 * When cfs_rq->curr == se (which implies @on_rq)
-		 * this field is vprot. See protect_slice().
-		 */
-		s64                     vlag;
-		u64                     vprot;
-	};
+	/* Approximated virtual lag: */
+	s64				vlag;
+	/* 'Protected' deadline, to give out minimum quantums: */
+	u64				vprot;
 	u64				slice;
 
 	u64				nr_migrations;