From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 4 Jul 2016 09:50:24 +0000
Subject: [PATCH 09/22] timer: Remove mod_timer_pinned

We switched all users to initialize the timers as pinned and call
mod_timer(). Remove the now unused function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Chris Mason <clm@fb.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: rt@linutronix.de
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 include/linux/timer.h |    3 ---
 kernel/time/timer.c   |   39 +++++----------------------------------
 2 files changed, 5 insertions(+), 37 deletions(-)

--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -190,12 +190,9 @@ extern void add_timer_on(struct timer_li
 extern int del_timer(struct timer_list * timer);
 extern int mod_timer(struct timer_list *timer, unsigned long expires);
 extern int mod_timer_pending(struct timer_list *timer, unsigned long expires);
-extern int mod_timer_pinned(struct timer_list *timer, unsigned long expires);
 
 extern void set_timer_slack(struct timer_list *time, int slack_hz);
 
-#define MOD_TIMER_NOT_PINNED	0
-#define MOD_TIMER_PINNED	1
 /*
  * The jiffies value which is added to now, when there is no timer
  * in the timer wheel:
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -779,8 +779,7 @@ static struct tvec_base *lock_timer_base
 }
 
 static inline int
-__mod_timer(struct timer_list *timer, unsigned long expires,
-	    bool pending_only, int pinned)
+__mod_timer(struct timer_list *timer, unsigned long expires, bool pending_only)
 {
 	struct tvec_base *base, *new_base;
 	unsigned long flags;
@@ -797,7 +796,7 @@ static inline int
 
 	debug_activate(timer, expires);
 
-	new_base = get_target_base(base, pinned || timer->flags & TIMER_PINNED);
+	new_base = get_target_base(base, timer->flags & TIMER_PINNED);
 
 	if (base != new_base) {
 		/*
@@ -840,7 +839,7 @@ static inline int
  */
 int mod_timer_pending(struct timer_list *timer, unsigned long expires)
 {
-	return __mod_timer(timer, expires, true, MOD_TIMER_NOT_PINNED);
+	return __mod_timer(timer, expires, true);
 }
 EXPORT_SYMBOL(mod_timer_pending);
 
@@ -915,39 +914,11 @@ int mod_timer(struct timer_list *timer,
 	if (timer_pending(timer) && timer->expires == expires)
 		return 1;
 
-	return __mod_timer(timer, expires, false, MOD_TIMER_NOT_PINNED);
+	return __mod_timer(timer, expires, false);
 }
 EXPORT_SYMBOL(mod_timer);
 
 /**
- * mod_timer_pinned - modify a timer's timeout
- * @timer: the timer to be modified
- * @expires: new timeout in jiffies
- *
- * mod_timer_pinned() is a way to update the expire field of an
- * active timer (if the timer is inactive it will be activated)
- * and to ensure that the timer is scheduled on the current CPU.
- *
- * Note that this does not prevent the timer from being migrated
- * when the current CPU goes offline.  If this is a problem for
- * you, use CPU-hotplug notifiers to handle it correctly, for
- * example, cancelling the timer when the corresponding CPU goes
- * offline.
- *
- * mod_timer_pinned(timer, expires) is equivalent to:
- *
- *     del_timer(timer); timer->expires = expires; add_timer(timer);
- */
-int mod_timer_pinned(struct timer_list *timer, unsigned long expires)
-{
-	if (timer->expires == expires && timer_pending(timer))
-		return 1;
-
-	return __mod_timer(timer, expires, false, MOD_TIMER_PINNED);
-}
-EXPORT_SYMBOL(mod_timer_pinned);
-
-/**
  * add_timer - start a timer
  * @timer: the timer to be added
  *
@@ -1527,7 +1498,7 @@ signed long __sched schedule_timeout(sig
 	expire = timeout + jiffies;
 
 	setup_timer_on_stack(&timer, process_timeout, (unsigned long)current);
-	__mod_timer(&timer, expire, false, MOD_TIMER_NOT_PINNED);
+	__mod_timer(&timer, expire, false);
 	schedule();
 	del_singleshot_timer_sync(&timer);
 
