[PATCH] hrtimers: Use consistent variable names for timerqueue_node iterations

[Ingo Molnar <mingo@kernel.org>]

We iterate over the timerqueue_node list of base->active.next 
frequently, but the iterator variables are a colorful and inconsistent 
mix: 'next', 'next_timer' (!), 'node' and 'node_next'.

For the 5 iterations we've invented 4 separate names for the same 
thing ... sigh.

So standardize the naming to 'node_next': this both tells us that it's 
an rbtree node, and that it's also a next element in a list.

No code changed:

   text	   data	    bss	    dec	    hex	filename
   7754	    427	      0	   8181	   1ff5	hrtimer.o.before
   7754	    427	      0	   8181	   1ff5	hrtimer.o.after

md5:
   de9af3b01d50c72af2d8b026ed22704a  hrtimer.o.before.asm
   de9af3b01d50c72af2d8b026ed22704a  hrtimer.o.after.asm

Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/time/hrtimer.c |   32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

Index: tip/kernel/time/hrtimer.c
===================================================================
--- tip.orig/kernel/time/hrtimer.c
+++ tip/kernel/time/hrtimer.c
@@ -448,14 +448,14 @@ static ktime_t __hrtimer_get_next_event(
 	int i;
 
 	for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++, base++) {
-		struct timerqueue_node *next;
+		struct timerqueue_node *node_next;
 		struct hrtimer *timer;
 
-		next = base->active.next;
-		if (!next)
+		node_next = base->active.next;
+		if (!node_next)
 			continue;
 
-		timer = container_of(next, struct hrtimer, node);
+		timer = container_of(node_next, struct hrtimer, node);
 		expires = ktime_sub(hrtimer_get_expires(timer), base->offset);
 		if (expires.tv64 < expires_next.tv64)
 			expires_next = expires;
@@ -872,13 +872,13 @@ static void __remove_hrtimer(struct hrti
 			     struct hrtimer_clock_base *base,
 			     unsigned long newstate, int reprogram)
 {
-	struct timerqueue_node *next_timer;
+	struct timerqueue_node *node_next;
 	if (!(timer->state & HRTIMER_STATE_ENQUEUED))
 		goto out;
 
-	next_timer = base->active.next;
+	node_next = base->active.next;
 	timerqueue_del(&base->active, &timer->node);
-	if (&timer->node == next_timer) {
+	if (&timer->node == node_next) {
 #ifdef CONFIG_HIGH_RES_TIMERS
 		/* Reprogram the clock event device. if enabled */
 		if (reprogram && hrtimer_hres_active()) {
@@ -1262,7 +1262,7 @@ retry:
 
 	for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
 		struct hrtimer_clock_base *base;
-		struct timerqueue_node *node;
+		struct timerqueue_node *node_next;
 		ktime_t basenow;
 
 		base = cpu_base->clock_base + i;
@@ -1271,10 +1271,10 @@ retry:
 
 		basenow = ktime_add(now, base->offset);
 
-		while ((node = base->active.next)) {
+		while ((node_next = base->active.next)) {
 			struct hrtimer *timer;
 
-			timer = container_of(node, struct hrtimer, node);
+			timer = container_of(node_next, struct hrtimer, node);
 
 			/*
 			 * The immediate goal for using the softexpires is
@@ -1428,7 +1428,7 @@ void hrtimer_run_pending(void)
  */
 void hrtimer_run_queues(void)
 {
-	struct timerqueue_node *node;
+	struct timerqueue_node *node_next;
 	struct hrtimer_cpu_base *cpu_base = this_cpu_ptr(&hrtimer_bases);
 	struct hrtimer_clock_base *base;
 	int index, gettime = 1;
@@ -1448,10 +1448,10 @@ void hrtimer_run_queues(void)
 
 		raw_spin_lock(&cpu_base->lock);
 
-		while ((node = base->active.next)) {
+		while ((node_next = base->active.next)) {
 			struct hrtimer *timer;
 
-			timer = container_of(node, struct hrtimer, node);
+			timer = container_of(node_next, struct hrtimer, node);
 			if (base->softirq_time.tv64 <=
 					hrtimer_get_expires_tv64(timer))
 				break;
@@ -1629,10 +1629,10 @@ static void migrate_hrtimer_list(struct
 				struct hrtimer_clock_base *new_base)
 {
 	struct hrtimer *timer;
-	struct timerqueue_node *node;
+	struct timerqueue_node *node_next;
 
-	while ((node = old_base->active.next)) {
-		timer = container_of(node, struct hrtimer, node);
+	while ((node_next = old_base->active.next)) {
+		timer = container_of(node_next, struct hrtimer, node);
 		BUG_ON(hrtimer_callback_running(timer));
 		debug_deactivate(timer);