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Subject[PATCH v3 2/2] cputime: remove rq parameter from irqtime_account_process_tick func
Date
Using the per cpu rq in function internal is better and meaningful, don't
need get and pass it from outside as a parameter.

It also reduce the object size. with defconfig + CONFIG_IRQ_TIME_ACCOUNTING
base with this patch
cputime.o 10632 bytes 10568 bytes

Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
---
kernel/sched/cputime.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 5086b24d7bee..4e7a1841be86 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -354,9 +354,10 @@ void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times)
* softirq as those do not count in task exec_runtime any more.
*/
static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
- struct rq *rq, int ticks)
+ int ticks)
{
u64 other, cputime = TICK_NSEC * ticks;
+ struct rq *rq;

/*
* When returning from idle, many ticks can get accounted at
@@ -370,6 +371,7 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
return;

cputime -= other;
+ rq = this_rq();

if (this_cpu_ksoftirqd() == p) {
/*
@@ -392,9 +394,7 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
#ifdef CONFIG_IRQ_TIME_ACCOUNTING
static void irqtime_account_idle_ticks(int ticks)
{
- struct rq *rq = this_rq();
-
- irqtime_account_process_tick(current, 0, rq, ticks);
+ irqtime_account_process_tick(current, 0, ticks);
}
#else /* CONFIG_IRQ_TIME_ACCOUNTING */
static inline void irqtime_account_idle_ticks(int ticks) { }
@@ -472,12 +472,10 @@ void thread_group_cputime_adjusted(struct task_struct *p, u64 *ut, u64 *st)
*/
void account_process_tick(struct task_struct *p, int user_tick)
{
- struct rq *rq = this_rq();
-
if (vtime_accounting_cpu_enabled())
return;

- irqtime_account_process_tick(p, user_tick, rq, 1);
+ irqtime_account_process_tick(p, user_tick, 1);
}

/*
--
2.19.1.856.g8858448bb
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