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authorRoman Zippel <zippel@linux-m68k.org>2006-03-26 01:38:09 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-26 08:57:02 -0800
commitb75f7a51ca75c977d7d77f735d7a7859194eb39e (patch)
treec8057a34970f9a6fb04bdfa37e2926df38747790
parent432569bb9d9d424d7ffe5b21f8205c55bdd1aaa8 (diff)
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[PATCH] hrtimers: remove state field
Remove the state field and encode this information in the rb_node similiar to normal timer. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--include/linux/hrtimer.h11
-rw-r--r--kernel/hrtimer.c14
2 files changed, 7 insertions, 18 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 0e8f476..f57cc7b 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -34,13 +34,7 @@ enum hrtimer_restart {
HRTIMER_RESTART,
};
-/*
- * Timer states:
- */
-enum hrtimer_state {
- HRTIMER_INACTIVE, /* Timer is inactive */
- HRTIMER_PENDING, /* Timer is pending */
-};
+#define HRTIMER_INACTIVE ((void *)1UL)
struct hrtimer_base;
@@ -61,7 +55,6 @@ struct hrtimer_base;
struct hrtimer {
struct rb_node node;
ktime_t expires;
- enum hrtimer_state state;
int (*function)(void *);
void *data;
struct hrtimer_base *base;
@@ -124,7 +117,7 @@ extern ktime_t hrtimer_get_next_event(void);
static inline int hrtimer_active(const struct hrtimer *timer)
{
- return timer->state == HRTIMER_PENDING;
+ return timer->node.rb_parent != HRTIMER_INACTIVE;
}
/* Forward a hrtimer so it expires after now: */
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 59ec50c..658d49f 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -374,8 +374,6 @@ static void enqueue_hrtimer(struct hrtimer *timer, struct hrtimer_base *base)
rb_link_node(&timer->node, parent, link);
rb_insert_color(&timer->node, &base->active);
- timer->state = HRTIMER_PENDING;
-
if (!base->first || timer->expires.tv64 <
rb_entry(base->first, struct hrtimer, node)->expires.tv64)
base->first = &timer->node;
@@ -395,6 +393,7 @@ static void __remove_hrtimer(struct hrtimer *timer, struct hrtimer_base *base)
if (base->first == &timer->node)
base->first = rb_next(&timer->node);
rb_erase(&timer->node, &base->active);
+ timer->node.rb_parent = HRTIMER_INACTIVE;
}
/*
@@ -405,7 +404,6 @@ remove_hrtimer(struct hrtimer *timer, struct hrtimer_base *base)
{
if (hrtimer_active(timer)) {
__remove_hrtimer(timer, base);
- timer->state = HRTIMER_INACTIVE;
return 1;
}
return 0;
@@ -579,6 +577,7 @@ void hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
clock_id = CLOCK_MONOTONIC;
timer->base = &bases[clock_id];
+ timer->node.rb_parent = HRTIMER_INACTIVE;
}
/**
@@ -625,7 +624,6 @@ static inline void run_hrtimer_queue(struct hrtimer_base *base)
fn = timer->function;
data = timer->data;
set_curr_timer(base, timer);
- timer->state = HRTIMER_INACTIVE;
__remove_hrtimer(timer, base);
spin_unlock_irq(&base->lock);
@@ -633,12 +631,10 @@ static inline void run_hrtimer_queue(struct hrtimer_base *base)
spin_lock_irq(&base->lock);
- /* Another CPU has added back the timer */
- if (timer->state != HRTIMER_INACTIVE)
- continue;
-
- if (restart != HRTIMER_NORESTART)
+ if (restart != HRTIMER_NORESTART) {
+ BUG_ON(hrtimer_active(timer));
enqueue_hrtimer(timer, base);
+ }
}
set_curr_timer(base, NULL);
spin_unlock_irq(&base->lock);