linux-kernel - [PATCH 2/3] sched: Expose some macros related with priority.

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Message-Id: <2b022810905b52d13238466807f4b2a691577180.1390859827.git.yangds.fnst@cn.fujitsu.com>
Date:	Mon, 27 Jan 2014 17:15:38 -0500
From:	Dongsheng Yang <yangds.fnst@...fujitsu.com>
To:	linux-kernel@...r.kernel.org, peterz@...radead.org
Cc:	raistlin@...ux.it, juri.lelli@...il.com, clark.williams@...il.com,
	mingo@...hat.com, rostedt@...dmis.org,
	Dongsheng Yang <yangds.fnst@...fujitsu.com>
Subject: [PATCH 2/3] sched: Expose some macros related with priority.

Some macros in kernel/sched/sched.h about priority are
private to kernel/sched. But they are useful to other
parts of the core kernel.

This patch move these macros from kernel/sched/sched.h to
include/linux/sched/prio.h so that they are available to
other subsystems.

Signed-off-by: Dongsheng Yang <yangds.fnst@...fujitsu.com>
---
 include/linux/sched/prio.h | 18 ++++++++++++++++++
 kernel/sched/sched.h       | 18 ------------------
 2 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/include/linux/sched/prio.h b/include/linux/sched/prio.h
index 9382ba8..13216f1 100644
--- a/include/linux/sched/prio.h
+++ b/include/linux/sched/prio.h
@@ -20,4 +20,22 @@
 #define MAX_PRIO		(MAX_RT_PRIO + 40)
 #define DEFAULT_PRIO		(MAX_RT_PRIO + 20)
 
+/*
+ * Convert user-nice values [ -20 ... 0 ... 19 ]
+ * to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
+ * and back.
+ */
+#define NICE_TO_PRIO(nice)	(MAX_RT_PRIO + (nice) + 20)
+#define PRIO_TO_NICE(prio)	((prio) - MAX_RT_PRIO - 20)
+#define TASK_NICE(p)		PRIO_TO_NICE((p)->static_prio)
+
+/*
+ * 'User priority' is the nice value converted to something we
+ * can work with better when scaling various scheduler parameters,
+ * it's a [ 0 ... 39 ] range.
+ */
+#define USER_PRIO(p)		((p)-MAX_RT_PRIO)
+#define TASK_USER_PRIO(p)	USER_PRIO((p)->static_prio)
+#define MAX_USER_PRIO		(USER_PRIO(MAX_PRIO))
+
 #endif /* _SCHED_PRIO_H */
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index c2119fd..b44720d 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -24,24 +24,6 @@ extern long calc_load_fold_active(struct rq *this_rq);
 extern void update_cpu_load_active(struct rq *this_rq);
 
 /*
- * Convert user-nice values [ -20 ... 0 ... 19 ]
- * to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
- * and back.
- */
-#define NICE_TO_PRIO(nice)	(MAX_RT_PRIO + (nice) + 20)
-#define PRIO_TO_NICE(prio)	((prio) - MAX_RT_PRIO - 20)
-#define TASK_NICE(p)		PRIO_TO_NICE((p)->static_prio)
-
-/*
- * 'User priority' is the nice value converted to something we
- * can work with better when scaling various scheduler parameters,
- * it's a [ 0 ... 39 ] range.
- */
-#define USER_PRIO(p)		((p)-MAX_RT_PRIO)
-#define TASK_USER_PRIO(p)	USER_PRIO((p)->static_prio)
-#define MAX_USER_PRIO		(USER_PRIO(MAX_PRIO))
-
-/*
  * Helpers for converting nanosecond timing to jiffy resolution
  */
 #define NS_TO_JIFFIES(TIME)	((unsigned long)(TIME) / (NSEC_PER_SEC / HZ))
-- 
1.8.2.1

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