linux-kernel - [PATCH 01/17] sched/prio: Add a inline function named nice_to

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Message-Id: <5ea9bc191ef5f47bef0623e2e11db24e4ea281c2.1394532288.git.yangds.fnst@cn.fujitsu.com>
Date:	Tue, 11 Mar 2014 18:09:09 +0800
From:	Dongsheng Yang <yangds.fnst@...fujitsu.com>
To:	linux-kernel@...r.kernel.org
Cc:	peterz@...radead.org, joe@...ches.com, mingo@...nel.org,
	tglx@...utronix.de, heiko.carstens@...ibm.com,
	Dongsheng Yang <yangds.fnst@...fujitsu.com>
Subject: [PATCH 01/17] sched/prio: Add a inline function named nice_to_rlimit() in prio.h.

This patch add an inline function named nice_to_rlimit() in prio.h to
convert nice value [19,-20] to rlimit style value [1,40].

Signed-off-by: Dongsheng Yang <yangds.fnst@...fujitsu.com>
---
 include/linux/sched/prio.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/sched/prio.h b/include/linux/sched/prio.h
index ac32258..29756f8 100644
--- a/include/linux/sched/prio.h
+++ b/include/linux/sched/prio.h
@@ -41,4 +41,12 @@
 #define TASK_USER_PRIO(p)	USER_PRIO((p)->static_prio)
 #define MAX_USER_PRIO		(USER_PRIO(MAX_PRIO))
 
+/*
+ * Convert nice value [19,-20] to rlimit style value [1,40].
+ */
+static inline long nice_to_rlimit(long nice)
+{
+	return (MAX_NICE - nice + 1);
+}
+
 #endif /* _SCHED_PRIO_H */
-- 
1.8.2.1

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