So we don't open-coded initialization of cpuacct in core.c.
Signed-off-by: Li Zefan <lize...@huawei.com>
---
kernel/sched/core.c | 8 ++------
kernel/sched/cpuacct.c | 7 +++++++
kernel/sched/cpuacct.h | 5 +++++
3 files changed, 14 insertions(+), 6 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 8eb3096..9f5a804 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6860,12 +6860,8 @@ 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;
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c
index 50ec24b..48b5e91 100644
--- a/kernel/sched/cpuacct.c
+++ b/kernel/sched/cpuacct.c
@@ -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,
diff --git a/kernel/sched/cpuacct.h b/kernel/sched/cpuacct.h
index a7f3d4a..551acd7 100644
--- a/kernel/sched/cpuacct.h
+++ b/kernel/sched/cpuacct.h
@@ -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)
{
}
--
1.8.0.2
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