linux-kernel - [PATCH] sched: use unsigned int for one-bit bitfield in sched_dl

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Date:   Fri, 17 Nov 2017 14:50:11 +0800
From:   Xin Long <lucien.xin@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        luca abeni <luca.abeni@...tannapisa.it>
Subject: [PATCH] sched: use unsigned int for one-bit bitfield in sched_dl_entity

This patch is to fix the 'dubious one-bit signed bitfield' error reported
by sparse, when using 'make C=2'.

Fixes: 799ba82de01e ("sched/deadline: Use C bitfields for the state flags")
Signed-off-by: Xin Long <lucien.xin@...il.com>
---
 include/linux/sched.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index a5dc7c9..3e35a37 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -473,10 +473,10 @@ struct sched_dl_entity {
 	 * conditions between the inactive timer handler and the wakeup
 	 * code.
 	 */
-	int				dl_throttled      : 1;
-	int				dl_boosted        : 1;
-	int				dl_yielded        : 1;
-	int				dl_non_contending : 1;
+	unsigned int			dl_throttled      : 1,
+					dl_boosted        : 1,
+					dl_yielded        : 1,
+					dl_non_contending : 1;
 
 	/*
 	 * Bandwidth enforcement timer. Each -deadline task has its
-- 
2.1.0