sched/cpuacct: Initialize root cpuacct earlier
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>
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 92930a8..ee8c1bd 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6936,8 +6936,6 @@
#endif /* CONFIG_CGROUP_SCHED */
- cpuacct_init();
-
for_each_possible_cpu(i) {
struct rq *rq;
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c
index a691c4d..0425581 100644
--- a/kernel/sched/cpuacct.c
+++ b/kernel/sched/cpuacct.c
@@ -59,7 +59,10 @@
}
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 @@
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,
diff --git a/kernel/sched/cpuacct.h b/kernel/sched/cpuacct.h
index 51cd76e..ed60562 100644
--- a/kernel/sched/cpuacct.h
+++ b/kernel/sched/cpuacct.h
@@ -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)
{
}