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sched: Replace hardcoding of -20 and 19 with MIN_NICE and MAX_NICE 

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/bd80780f19b4f9b4a765acc353c8dbc130274dd6.1392103744.git.yangds.fnst@cn.fujitsu.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Dongsheng Yang 2014-02-11 15:34:50 +08:00 committed by Ingo Molnar
parent d277d868da
commit 75e45d512f
2 changed files with 7 additions and 7 deletions
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2
kernel/sched/auto_group.c
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@ -203,7 +203,7 @@ int proc_sched_autogroup_set_nice(struct task_struct *p, int nice)
struct autogroup *ag;
int err;
if (nice < -20 || nice > 19)
if (nice < MIN_NICE || nice > MAX_NICE)
return -EINVAL;
err = security_task_setnice(current, nice);

12
kernel/sched/core.c
View File

@ -2993,7 +2993,7 @@ void set_user_nice(struct task_struct *p, long nice)
unsigned long flags;
struct rq *rq;
if (task_nice(p) == nice || nice < -20 || nice > 19)
if (task_nice(p) == nice || nice < MIN_NICE || nice > MAX_NICE)
return;
/*
* We have to be careful, if called from sys_setpriority(),
@ -3072,10 +3072,10 @@ SYSCALL_DEFINE1(nice, int, increment)
increment = 40;
nice = task_nice(current) + increment;
if (nice < -20)
nice = -20;
if (nice > 19)
nice = 19;
if (nice < MIN_NICE)
nice = MIN_NICE;
if (nice > MAX_NICE)
nice = MAX_NICE;
if (increment < 0 && !can_nice(current, nice))
return -EPERM;
@ -3623,7 +3623,7 @@ static int sched_copy_attr(struct sched_attr __user *uattr,
* XXX: do we want to be lenient like existing syscalls; or do we want
* to be strict and return an error on out-of-bounds values?
*/
attr->sched_nice = clamp(attr->sched_nice, -20, 19);
attr->sched_nice = clamp(attr->sched_nice, MIN_NICE, MAX_NICE);
out:
return ret;