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Commit 0607500f authored by Arne Coucheron's avatar Arne Coucheron Committed by TARKZiM
Browse files

sched: Make some macros available to other parts of the kernel 

Needed for the updated binder from 3.18

Change-Id: I1aa577c5c592ce49014fb49c2fb81410aafbb69f
parent 1c947737

include/linux/sched/rt.h

+40 −2
Original line number Diff line number Diff line 
#ifndef _SCHED_RT_H

#define _SCHED_RT_H



#define MAX_NICE	19

#define MIN_NICE	-20

#define NICE_WIDTH	(MAX_NICE - MIN_NICE + 1)



/*

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

 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
@@ -17,8 +21,42 @@ 
#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)

#define MAX_PRIO		(MAX_RT_PRIO + NICE_WIDTH)

#define DEFAULT_PRIO		(MAX_RT_PRIO + NICE_WIDTH / 2)



/*

 * Convert user-nice values [ -20 ... 0 ... 19 ]

 * to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],

 * and back.

 */

#define NICE_TO_PRIO(nice)	((nice) + DEFAULT_PRIO)

#define PRIO_TO_NICE(prio)	((prio) - DEFAULT_PRIO)

#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))



/*

 * Convert nice value [19,-20] to rlimit style value [1,40].

 */

static inline long nice_to_rlimit(long nice)

{

	return (MAX_NICE - nice + 1);

}



/*

 * Convert rlimit style value [1,40] to nice value [-20, 19].

 */

static inline long rlimit_to_nice(long prio)

{

	return (MAX_NICE - prio + 1);

}



static inline int rt_prio(int prio)

{

kernel/sched/sched.h

+0 −18
Original line number Diff line number Diff line
@@ -17,24 +17,6 @@ 


extern __read_mostly int scheduler_running;



/*

 * 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

 */