From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 4 Jul 2016 09:50:28 +0000
Subject: [PATCH 12/22] timer: Give a few structs and members proper names

Some of the names are not longer correct and others are simply too long to
type. Clean it up before we switch the wheel implementation over to the new
scheme.

No functional change.

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>
---
 kernel/time/timer.c |  118 ++++++++++++++++++++++++++--------------------------
 1 file changed, 59 insertions(+), 59 deletions(-)

--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -77,10 +77,10 @@ struct tvec_root {
 	struct hlist_head vec[TVR_SIZE];
 };
 
-struct tvec_base {
+struct timer_base {
 	spinlock_t lock;
 	struct timer_list *running_timer;
-	unsigned long timer_jiffies;
+	unsigned long clk;
 	unsigned long next_timer;
 	unsigned long active_timers;
 	unsigned long all_timers;
@@ -95,7 +95,7 @@ struct tvec_base {
 } ____cacheline_aligned;
 
 
-static DEFINE_PER_CPU(struct tvec_base, tvec_bases);
+static DEFINE_PER_CPU(struct timer_base, timer_bases);
 
 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
 unsigned int sysctl_timer_migration = 1;
@@ -106,15 +106,15 @@ void timers_update_migration(bool update
 	unsigned int cpu;
 
 	/* Avoid the loop, if nothing to update */
-	if (this_cpu_read(tvec_bases.migration_enabled) == on)
+	if (this_cpu_read(timer_bases.migration_enabled) == on)
 		return;
 
 	for_each_possible_cpu(cpu) {
-		per_cpu(tvec_bases.migration_enabled, cpu) = on;
+		per_cpu(timer_bases.migration_enabled, cpu) = on;
 		per_cpu(hrtimer_bases.migration_enabled, cpu) = on;
 		if (!update_nohz)
 			continue;
-		per_cpu(tvec_bases.nohz_active, cpu) = true;
+		per_cpu(timer_bases.nohz_active, cpu) = true;
 		per_cpu(hrtimer_bases.nohz_active, cpu) = true;
 	}
 }
@@ -134,18 +134,18 @@ int timer_migration_handler(struct ctl_t
 	return ret;
 }
 
-static inline struct tvec_base *get_target_base(struct tvec_base *base,
+static inline struct timer_base *get_target_base(struct timer_base *base,
 						int pinned)
 {
 	if (pinned || !base->migration_enabled)
-		return this_cpu_ptr(&tvec_bases);
-	return per_cpu_ptr(&tvec_bases, get_nohz_timer_target());
+		return this_cpu_ptr(&timer_bases);
+	return per_cpu_ptr(&timer_bases, get_nohz_timer_target());
 }
 #else
-static inline struct tvec_base *get_target_base(struct tvec_base *base,
+static inline struct timer_base *get_target_base(struct timer_base *base,
 						int pinned)
 {
-	return this_cpu_ptr(&tvec_bases);
+	return this_cpu_ptr(&timer_bases);
 }
 #endif
 
@@ -371,10 +371,10 @@ void set_timer_slack(struct timer_list *
 EXPORT_SYMBOL_GPL(set_timer_slack);
 
 static void
-__internal_add_timer(struct tvec_base *base, struct timer_list *timer)
+__internal_add_timer(struct timer_base *base, struct timer_list *timer)
 {
 	unsigned long expires = timer->expires;
-	unsigned long idx = expires - base->timer_jiffies;
+	unsigned long idx = expires - base->clk;
 	struct hlist_head *vec;
 
 	if (idx < TVR_SIZE) {
@@ -394,7 +394,7 @@ static void
 		 * Can happen if you add a timer with expires == jiffies,
 		 * or you set a timer to go off in the past
 		 */
-		vec = base->tv1.vec + (base->timer_jiffies & TVR_MASK);
+		vec = base->tv1.vec + (base->clk & TVR_MASK);
 	} else {
 		int i;
 		/* If the timeout is larger than MAX_TVAL (on 64-bit
@@ -403,7 +403,7 @@ static void
 		 */
 		if (idx > MAX_TVAL) {
 			idx = MAX_TVAL;
-			expires = idx + base->timer_jiffies;
+			expires = idx + base->clk;
 		}
 		i = (expires >> (TVR_BITS + 3 * TVN_BITS)) & TVN_MASK;
 		vec = base->tv5.vec + i;
@@ -412,11 +412,11 @@ static void
 	hlist_add_head(&timer->entry, vec);
 }
 
-static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)
+static void internal_add_timer(struct timer_base *base, struct timer_list *timer)
 {
 	/* Advance base->jiffies, if the base is empty */
 	if (!base->all_timers++)
-		base->timer_jiffies = jiffies;
+		base->clk = jiffies;
 
 	__internal_add_timer(base, timer);
 	/*
@@ -722,7 +722,7 @@ static inline void detach_timer(struct t
 }
 
 static inline void
-detach_expired_timer(struct timer_list *timer, struct tvec_base *base)
+detach_expired_timer(struct timer_list *timer, struct timer_base *base)
 {
 	detach_timer(timer, true);
 	if (!(timer->flags & TIMER_DEFERRABLE))
@@ -730,7 +730,7 @@ detach_expired_timer(struct timer_list *
 	base->all_timers--;
 }
 
-static int detach_if_pending(struct timer_list *timer, struct tvec_base *base,
+static int detach_if_pending(struct timer_list *timer, struct timer_base *base,
 			     bool clear_pending)
 {
 	if (!timer_pending(timer))
@@ -740,16 +740,16 @@ static int detach_if_pending(struct time
 	if (!(timer->flags & TIMER_DEFERRABLE)) {
 		base->active_timers--;
 		if (timer->expires == base->next_timer)
-			base->next_timer = base->timer_jiffies;
+			base->next_timer = base->clk;
 	}
 	/* If this was the last timer, advance base->jiffies */
 	if (!--base->all_timers)
-		base->timer_jiffies = jiffies;
+		base->clk = jiffies;
 	return 1;
 }
 
 /*
- * We are using hashed locking: holding per_cpu(tvec_bases).lock
+ * We are using hashed locking: holding per_cpu(timer_bases).lock
  * means that all timers which are tied to this base via timer->base are
  * locked, and the base itself is locked too.
  *
@@ -759,16 +759,16 @@ static int detach_if_pending(struct time
  * When the timer's base is locked and removed from the list, the
  * TIMER_MIGRATING flag is set, FIXME
  */
-static struct tvec_base *lock_timer_base(struct timer_list *timer,
+static struct timer_base *lock_timer_base(struct timer_list *timer,
 					unsigned long *flags)
 	__acquires(timer->base->lock)
 {
 	for (;;) {
 		u32 tf = timer->flags;
-		struct tvec_base *base;
+		struct timer_base *base;
 
 		if (!(tf & TIMER_MIGRATING)) {
-			base = per_cpu_ptr(&tvec_bases, tf & TIMER_CPUMASK);
+			base = per_cpu_ptr(&timer_bases, tf & TIMER_CPUMASK);
 			spin_lock_irqsave(&base->lock, *flags);
 			if (timer->flags == tf)
 				return base;
@@ -781,7 +781,7 @@ static struct tvec_base *lock_timer_base
 static inline int
 __mod_timer(struct timer_list *timer, unsigned long expires, bool pending_only)
 {
-	struct tvec_base *base, *new_base;
+	struct timer_base *base, *new_base;
 	unsigned long flags;
 	int ret = 0;
 
@@ -948,8 +948,8 @@ EXPORT_SYMBOL(add_timer);
  */
 void add_timer_on(struct timer_list *timer, int cpu)
 {
-	struct tvec_base *new_base = per_cpu_ptr(&tvec_bases, cpu);
-	struct tvec_base *base;
+	struct timer_base *new_base = per_cpu_ptr(&timer_bases, cpu);
+	struct timer_base *base;
 	unsigned long flags;
 
 	timer_stats_timer_set_start_info(timer);
@@ -990,7 +990,7 @@ EXPORT_SYMBOL_GPL(add_timer_on);
  */
 int del_timer(struct timer_list *timer)
 {
-	struct tvec_base *base;
+	struct timer_base *base;
 	unsigned long flags;
 	int ret = 0;
 
@@ -1016,7 +1016,7 @@ EXPORT_SYMBOL(del_timer);
  */
 int try_to_del_timer_sync(struct timer_list *timer)
 {
-	struct tvec_base *base;
+	struct timer_base *base;
 	unsigned long flags;
 	int ret = -1;
 
@@ -1100,7 +1100,7 @@ int del_timer_sync(struct timer_list *ti
 EXPORT_SYMBOL(del_timer_sync);
 #endif
 
-static int cascade(struct tvec_base *base, struct tvec *tv, int index)
+static int cascade(struct timer_base *base, struct tvec *tv, int index)
 {
 	/* cascade all the timers from tv up one level */
 	struct timer_list *timer;
@@ -1164,7 +1164,7 @@ static void call_timer_fn(struct timer_l
 	}
 }
 
-#define INDEX(N) ((base->timer_jiffies >> (TVR_BITS + (N) * TVN_BITS)) & TVN_MASK)
+#define INDEX(N) ((base->clk >> (TVR_BITS + (N) * TVN_BITS)) & TVN_MASK)
 
 /**
  * __run_timers - run all expired timers (if any) on this CPU.
@@ -1173,23 +1173,23 @@ static void call_timer_fn(struct timer_l
  * This function cascades all vectors and executes all expired timer
  * vectors.
  */
-static inline void __run_timers(struct tvec_base *base)
+static inline void __run_timers(struct timer_base *base)
 {
 	struct timer_list *timer;
 
 	spin_lock_irq(&base->lock);
 
-	while (time_after_eq(jiffies, base->timer_jiffies)) {
+	while (time_after_eq(jiffies, base->clk)) {
 		struct hlist_head work_list;
 		struct hlist_head *head = &work_list;
 		int index;
 
 		if (!base->all_timers) {
-			base->timer_jiffies = jiffies;
+			base->clk = jiffies;
 			break;
 		}
 
-		index = base->timer_jiffies & TVR_MASK;
+		index = base->clk & TVR_MASK;
 
 		/*
 		 * Cascade timers:
@@ -1199,7 +1199,7 @@ static inline void __run_timers(struct t
 				(!cascade(base, &base->tv3, INDEX(1))) &&
 					!cascade(base, &base->tv4, INDEX(2)))
 			cascade(base, &base->tv5, INDEX(3));
-		++base->timer_jiffies;
+		++base->clk;
 		hlist_move_list(base->tv1.vec + index, head);
 		while (!hlist_empty(head)) {
 			void (*fn)(unsigned long);
@@ -1237,16 +1237,16 @@ static inline void __run_timers(struct t
  * is used on S/390 to stop all activity when a CPU is idle.
  * This function needs to be called with interrupts disabled.
  */
-static unsigned long __next_timer_interrupt(struct tvec_base *base)
+static unsigned long __next_timer_interrupt(struct timer_base *base)
 {
-	unsigned long timer_jiffies = base->timer_jiffies;
-	unsigned long expires = timer_jiffies + NEXT_TIMER_MAX_DELTA;
+	unsigned long clk = base->clk;
+	unsigned long expires = clk + NEXT_TIMER_MAX_DELTA;
 	int index, slot, array, found = 0;
 	struct timer_list *nte;
 	struct tvec *varray[4];
 
 	/* Look for timer events in tv1. */
-	index = slot = timer_jiffies & TVR_MASK;
+	index = slot = clk & TVR_MASK;
 	do {
 		hlist_for_each_entry(nte, base->tv1.vec + slot, entry) {
 			if (nte->flags & TIMER_DEFERRABLE)
@@ -1265,8 +1265,8 @@ static unsigned long __next_timer_interr
 cascade:
 	/* Calculate the next cascade event */
 	if (index)
-		timer_jiffies += TVR_SIZE - index;
-	timer_jiffies >>= TVR_BITS;
+		clk += TVR_SIZE - index;
+	clk >>= TVR_BITS;
 
 	/* Check tv2-tv5. */
 	varray[0] = &base->tv2;
@@ -1277,7 +1277,7 @@ static unsigned long __next_timer_interr
 	for (array = 0; array < 4; array++) {
 		struct tvec *varp = varray[array];
 
-		index = slot = timer_jiffies & TVN_MASK;
+		index = slot = clk & TVN_MASK;
 		do {
 			hlist_for_each_entry(nte, varp->vec + slot, entry) {
 				if (nte->flags & TIMER_DEFERRABLE)
@@ -1301,8 +1301,8 @@ static unsigned long __next_timer_interr
 		} while (slot != index);
 
 		if (index)
-			timer_jiffies += TVN_SIZE - index;
-		timer_jiffies >>= TVN_BITS;
+			clk += TVN_SIZE - index;
+		clk >>= TVN_BITS;
 	}
 	return expires;
 }
@@ -1350,7 +1350,7 @@ static u64 cmp_next_hrtimer_event(u64 ba
  */
 u64 get_next_timer_interrupt(unsigned long basej, u64 basem)
 {
-	struct tvec_base *base = this_cpu_ptr(&tvec_bases);
+	struct timer_base *base = this_cpu_ptr(&timer_bases);
 	u64 expires = KTIME_MAX;
 	unsigned long nextevt;
 
@@ -1363,7 +1363,7 @@ u64 get_next_timer_interrupt(unsigned lo
 
 	spin_lock(&base->lock);
 	if (base->active_timers) {
-		if (time_before_eq(base->next_timer, base->timer_jiffies))
+		if (time_before_eq(base->next_timer, base->clk))
 			base->next_timer = __next_timer_interrupt(base);
 		nextevt = base->next_timer;
 		if (time_before_eq(nextevt, basej))
@@ -1402,9 +1402,9 @@ void update_process_times(int user_tick)
  */
 static void run_timer_softirq(struct softirq_action *h)
 {
-	struct tvec_base *base = this_cpu_ptr(&tvec_bases);
+	struct timer_base *base = this_cpu_ptr(&timer_bases);
 
-	if (time_after_eq(jiffies, base->timer_jiffies))
+	if (time_after_eq(jiffies, base->clk))
 		__run_timers(base);
 }
 
@@ -1549,7 +1549,7 @@ signed long __sched schedule_timeout_idl
 EXPORT_SYMBOL(schedule_timeout_idle);
 
 #ifdef CONFIG_HOTPLUG_CPU
-static void migrate_timer_list(struct tvec_base *new_base, struct hlist_head *head)
+static void migrate_timer_list(struct timer_base *new_base, struct hlist_head *head)
 {
 	struct timer_list *timer;
 	int cpu = new_base->cpu;
@@ -1565,13 +1565,13 @@ static void migrate_timer_list(struct tv
 
 static void migrate_timers(int cpu)
 {
-	struct tvec_base *old_base;
-	struct tvec_base *new_base;
+	struct timer_base *old_base;
+	struct timer_base *new_base;
 	int i;
 
 	BUG_ON(cpu_online(cpu));
-	old_base = per_cpu_ptr(&tvec_bases, cpu);
-	new_base = get_cpu_ptr(&tvec_bases);
+	old_base = per_cpu_ptr(&timer_bases, cpu);
+	new_base = get_cpu_ptr(&timer_bases);
 	/*
 	 * The caller is globally serialized and nobody else
 	 * takes two locks at once, deadlock is not possible.
@@ -1595,7 +1595,7 @@ static void migrate_timers(int cpu)
 
 	spin_unlock(&old_base->lock);
 	spin_unlock_irq(&new_base->lock);
-	put_cpu_ptr(&tvec_bases);
+	put_cpu_ptr(&timer_bases);
 }
 
 static int timer_cpu_notify(struct notifier_block *self,
@@ -1623,13 +1623,13 @@ static inline void timer_register_cpu_no
 
 static void __init init_timer_cpu(int cpu)
 {
-	struct tvec_base *base = per_cpu_ptr(&tvec_bases, cpu);
+	struct timer_base *base = per_cpu_ptr(&timer_bases, cpu);
 
 	base->cpu = cpu;
 	spin_lock_init(&base->lock);
 
-	base->timer_jiffies = jiffies;
-	base->next_timer = base->timer_jiffies;
+	base->clk = jiffies;
+	base->next_timer = base->clk;
 }
 
 static void __init init_timer_cpus(void)
