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sched/cpuacct: Initialize root cpuacct earlier

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Now we don't need cpuacct_init(), and instead we just initialize
root_cpuacct when it's defined.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: Tejun Heo <tj@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/51553834.9090701@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Li Zefan 2013-03-29 14:44:04 +08:00 committed by Ingo Molnar
parent 7943e15a3e
commit 14c6d3c8a4
3 changed files with 4 additions and 14 deletions
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2
kernel/sched/core.c
View File

@ -6936,8 +6936,6 @@ void __init sched_init(void)
#endif /* CONFIG_CGROUP_SCHED */
cpuacct_init();
for_each_possible_cpu(i) {
struct rq *rq;

11
kernel/sched/cpuacct.c
View File

@ -59,7 +59,10 @@ static inline struct cpuacct *parent_ca(struct cpuacct *ca)
}
static DEFINE_PER_CPU(u64, root_cpuacct_cpuusage);
static struct cpuacct root_cpuacct;
static struct cpuacct root_cpuacct = {
.cpustat = &kernel_cpustat,
.cpuusage = &root_cpuacct_cpuusage,
};
/* create a new cpu accounting group */
static struct cgroup_subsys_state *cpuacct_css_alloc(struct cgroup *cgrp)
@ -288,12 +291,6 @@ void cpuacct_account_field(struct task_struct *p, int index, u64 val)
rcu_read_unlock();
}
void __init cpuacct_init(void)
{
root_cpuacct.cpustat = &kernel_cpustat;
root_cpuacct.cpuusage = &root_cpuacct_cpuusage;
}
struct cgroup_subsys cpuacct_subsys = {
.name = "cpuacct",
.css_alloc = cpuacct_css_alloc,

5
kernel/sched/cpuacct.h
View File

@ -1,15 +1,10 @@
#ifdef CONFIG_CGROUP_CPUACCT
extern void cpuacct_init(void);
extern void cpuacct_charge(struct task_struct *tsk, u64 cputime);
extern void cpuacct_account_field(struct task_struct *p, int index, u64 val);
#else
static inline void cpuacct_init(void)
{
}
static inline void cpuacct_charge(struct task_struct *tsk, u64 cputime)
{
}