Re: [PATCH] Shrink rbtree

[David Woodhouse <dwmw2@infradead.org>]

On Fri, 2006-04-21 at 18:09 -0700, Andrew Morton wrote:
> #define HRTIMER_INACTIVE        ((void *)1UL) 

Ah. That's newer than the kernel I tested on. Your patch isn't going to
make kernel/hrtimer.c compile though, surely? Let's do it the same way
everyone else marks off-tree nodes -- by setting its parent pointer to
point to itself....

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 306acf1..7d2a1b9 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -127,7 +127,7 @@ #endif
 
 static inline int hrtimer_active(const struct hrtimer *timer)
 {
-	return timer->node.rb_parent != HRTIMER_INACTIVE;
+	return rb_parent(&timer->node) != &timer->node;
 }
 
 /* Forward a hrtimer so it expires after now: */
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index d2a7296..04ab27d 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -393,7 +393,7 @@ static void __remove_hrtimer(struct hrti
 	if (base->first == &timer->node)
 		base->first = rb_next(&timer->node);
 	rb_erase(&timer->node, &base->active);
-	timer->node.rb_parent = HRTIMER_INACTIVE;
+	rb_set_parent(&timer->node, &timer->node);
 }
 
 /*
@@ -578,7 +578,7 @@ void hrtimer_init(struct hrtimer *timer,
 		clock_id = CLOCK_MONOTONIC;
 
 	timer->base = &bases[clock_id];
-	timer->node.rb_parent = HRTIMER_INACTIVE;
+	rb_set_parent(&timer->node, &timer->node);
 }
 
 /**

-- 
dwmw2