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authorMuchun Song <songmuchun@bytedance.com>2020-05-07 11:10:39 +0800
committerPeter Zijlstra <peterz@infradead.org>2020-05-19 20:34:13 +0200
commit12aa2587388de6697fd2e585ae6a90f70249540b (patch)
tree88a90b936c5f995ee9938cde7c6f875769f4e567 /kernel/sched
parent7d148be69e3a0eaa9d029a3c51b545e322116a99 (diff)
downloadlinux-12aa2587388de6697fd2e585ae6a90f70249540b.tar.bz2
sched/cpuacct: Use __this_cpu_add() instead of this_cpu_ptr()
The cpuacct_charge() and cpuacct_account_field() are called with rq->lock held, and this means preemption(and IRQs) are indeed disabled, so it is safe to use __this_cpu_*() to allow for better code-generation. Signed-off-by: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200507031039.32615-1-songmuchun@bytedance.com
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/cpuacct.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c
index 9fbb10383434..6448b0438ffb 100644
--- a/kernel/sched/cpuacct.c
+++ b/kernel/sched/cpuacct.c
@@ -347,7 +347,7 @@ void cpuacct_charge(struct task_struct *tsk, u64 cputime)
rcu_read_lock();
for (ca = task_ca(tsk); ca; ca = parent_ca(ca))
- this_cpu_ptr(ca->cpuusage)->usages[index] += cputime;
+ __this_cpu_add(ca->cpuusage->usages[index], cputime);
rcu_read_unlock();
}
@@ -363,7 +363,7 @@ void cpuacct_account_field(struct task_struct *tsk, int index, u64 val)
rcu_read_lock();
for (ca = task_ca(tsk); ca != &root_cpuacct; ca = parent_ca(ca))
- this_cpu_ptr(ca->cpustat)->cpustat[index] += val;
+ __this_cpu_add(ca->cpustat->cpustat[index], val);
rcu_read_unlock();
}