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Subject[PATCH 2/3] sched/cputime: code cleanup in irqtime_account_process_tick
Date
In this func, since account_system_time() considers guest time account
and other system time. we could fold the account_guest_time into
account_system_time() to simply the code.

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: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
---
kernel/sched/cputime.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index cff3e656566d..46b837e94fce 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -381,13 +381,10 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
account_system_index_time(p, cputime, CPUTIME_SOFTIRQ);
} else if (user_tick) {
account_user_time(p, cputime);
- } else if (p == this_rq()->idle) {
+ } else if ((p != this_rq()->idle) || (irq_count() != HARDIRQ_OFFSET))
+ account_system_time(p, HARDIRQ_OFFSET, cputime);
+ else
account_idle_time(cputime);
- } else if (p->flags & PF_VCPU) { /* System time or guest time */
- account_guest_time(p, cputime);
- } else {
- account_system_index_time(p, cputime, CPUTIME_SYSTEM);
- }
}

static void irqtime_account_idle_ticks(int ticks)
--
1.8.3.1
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