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Commit 5c228079 authored by Dongsheng Yang's avatar Dongsheng Yang Committed by Ingo Molnar
Browse files

sched: Move the priority specific bits into a new header file 



Some bits about priority are defined in linux/sched/rt.h, but
some of them are not only for rt scheduler, such as MAX_PRIO.

This patch move them all into a new header file, linux/sched/prio.h.

Signed-off-by: default avatarDongsheng Yang <yangds.fnst@cn.fujitsu.com>
Cc: clark.williams@gmail.com
Cc: rostedt@goodmis.org
Cc: raistlin@linux.it
Cc: juri.lelli@gmail.com
Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/f7549508a1588da2c613d601748ca9de30fa5dcf.1390859827.git.yangds.fnst@cn.fujitsu.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 390f3258

include/linux/sched.h

+2 −0
Original line number Diff line number Diff line
@@ -3,6 +3,8 @@ 


#include <uapi/linux/sched.h>



#include <linux/sched/prio.h>





struct sched_param {

	int sched_priority;

include/linux/sched/prio.h

0 → 100644
+23 −0
Original line number Diff line number Diff line 
#ifndef _SCHED_PRIO_H

#define _SCHED_PRIO_H



/*

 * Priority of a process goes from 0..MAX_PRIO-1, valid RT

 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH

 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority

 * values are inverted: lower p->prio value means higher priority.

 *

 * The MAX_USER_RT_PRIO value allows the actual maximum

 * RT priority to be separate from the value exported to

 * user-space.  This allows kernel threads to set their

 * priority to a value higher than any user task. Note:

 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.

 */



#define MAX_USER_RT_PRIO	100

#define MAX_RT_PRIO		MAX_USER_RT_PRIO



#define MAX_PRIO		(MAX_RT_PRIO + 40)

#define DEFAULT_PRIO		(MAX_RT_PRIO + 20)



#endif /* _SCHED_PRIO_H */

include/linux/sched/rt.h

+1 −18
Original line number Diff line number Diff line 
#ifndef _SCHED_RT_H

#define _SCHED_RT_H



/*

 * Priority of a process goes from 0..MAX_PRIO-1, valid RT

 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH

 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority

 * values are inverted: lower p->prio value means higher priority.

 *

 * The MAX_USER_RT_PRIO value allows the actual maximum

 * RT priority to be separate from the value exported to

 * user-space.  This allows kernel threads to set their

 * priority to a value higher than any user task. Note:

 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.

 */



#define MAX_USER_RT_PRIO	100

#define MAX_RT_PRIO		MAX_USER_RT_PRIO



#define MAX_PRIO		(MAX_RT_PRIO + 40)

#define DEFAULT_PRIO		(MAX_RT_PRIO + 20)

#include <linux/sched/prio.h>



static inline int rt_prio(int prio)

{