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sched/cpuacct: Add cpuacct_init() 

So we don't open-coded initialization of cpuacct in core.c.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/51553687.1060906@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Li Zefan 2013-03-29 14:36:55 +08:00 committed by Ingo Molnar
parent 60fed7891d
commit dbe4b41f98
3 changed files with 14 additions and 6 deletions
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8
kernel/sched/core.c
View File

@ -6936,12 +6936,8 @@ void __init sched_init(void)
#endif /* CONFIG_CGROUP_SCHED */
#ifdef CONFIG_CGROUP_CPUACCT
root_cpuacct.cpustat = &kernel_cpustat;
root_cpuacct.cpuusage = alloc_percpu(u64);
/* Too early, not expected to fail */
BUG_ON(!root_cpuacct.cpuusage);
#endif
cpuacct_init();
for_each_possible_cpu(i) {
struct rq *rq;

7
kernel/sched/cpuacct.c
View File

@ -218,6 +218,13 @@ void cpuacct_charge(struct task_struct *tsk, u64 cputime)
rcu_read_unlock();
}
void __init cpuacct_init(void)
{
root_cpuacct.cpustat = &kernel_cpustat;
root_cpuacct.cpuusage = alloc_percpu(u64);
BUG_ON(!root_cpuacct.cpuusage); /* Too early, not expected to fail */
}
struct cgroup_subsys cpuacct_subsys = {
.name = "cpuacct",
.css_alloc = cpuacct_css_alloc,

5
kernel/sched/cpuacct.h
View File

@ -41,10 +41,15 @@ static inline struct cpuacct *parent_ca(struct cpuacct *ca)
return cgroup_ca(ca->css.cgroup->parent);
}
extern void cpuacct_init(void);
extern void cpuacct_charge(struct task_struct *tsk, u64 cputime);
#else
static inline void cpuacct_init(void)
{
}
static inline void cpuacct_charge(struct task_struct *tsk, u64 cputime)
{
}