[PATCH 2/5] tick: Remove arch_needs_cpu

[Mete Durlu <meted@linux.ibm.com>]

Remove unused arch_needs_cpu() hook. No architectures use it after
s390 removed its use case.

Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Mete Durlu <meted@linux.ibm.com>
---
 include/linux/tick.h     | 3 ---
 kernel/time/tick-sched.c | 7 +++----
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/include/linux/tick.h b/include/linux/tick.h
index 738007d6f577..0f6757f81839 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -44,9 +44,6 @@ static inline void tick_unfreeze(void) { }
 
 #ifdef CONFIG_TICK_ONESHOT
 extern void tick_irq_enter(void);
-#  ifndef arch_needs_cpu
-#   define arch_needs_cpu() (0)
-#  endif
 # else
 static inline void tick_irq_enter(void) { }
 #endif
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index cbbb87a0c6e7..cee18999d818 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -943,8 +943,7 @@ static ktime_t tick_nohz_next_event(struct tick_sched *ts, int cpu)
 	ts->timer_expires_base = basemono;
 
 	/*
-	 * Keep the periodic tick, when RCU, architecture or irq_work
-	 * requests it.
+	 * Keep the periodic tick, when RCU or irq_work requests it.
 	 * Aside of that, check whether the local timer softirq is
 	 * pending. If so, its a bad idea to call get_next_timer_interrupt(),
 	 * because there is an already expired timer, so it will request
@@ -952,8 +951,8 @@ static ktime_t tick_nohz_next_event(struct tick_sched *ts, int cpu)
 	 * minimal delta, which brings us back to this place
 	 * immediately. Lather, rinse and repeat...
 	 */
-	if (rcu_needs_cpu() || arch_needs_cpu() ||
-	    irq_work_needs_cpu() || local_timer_softirq_pending()) {
+	if (rcu_needs_cpu() || irq_work_needs_cpu() ||
+	    local_timer_softirq_pending()) {
 		next_tick = basemono + TICK_NSEC;
 	} else {
 		/*
-- 
2.54.0