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drbd: use RB_DECLARE_CALLBACKS() to define augment callbacks

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The original code are the same as RB_DECLARE_CALLBACKS().

CC: Michel Lespinasse <walken@google.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Andreas Gruenbacher <agruen@linbit.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Lai Jiangshan 2014-09-18 16:49:42 +02:00 committed by Jens Axboe
parent 82cfb90bc9
commit e9f05b4cfe
1 changed files with 2 additions and 34 deletions
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36
drivers/block/drbd/drbd_interval.c
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@ -37,40 +37,8 @@ compute_subtree_last(struct drbd_interval *node)
return max;
}
static void augment_propagate(struct rb_node *rb, struct rb_node *stop)
{
while (rb != stop) {
struct drbd_interval *node = rb_entry(rb, struct drbd_interval, rb);
sector_t subtree_last = compute_subtree_last(node);
if (node->end == subtree_last)
break;
node->end = subtree_last;
rb = rb_parent(&node->rb);
}
}
static void augment_copy(struct rb_node *rb_old, struct rb_node *rb_new)
{
struct drbd_interval *old = rb_entry(rb_old, struct drbd_interval, rb);
struct drbd_interval *new = rb_entry(rb_new, struct drbd_interval, rb);
new->end = old->end;
}
static void augment_rotate(struct rb_node *rb_old, struct rb_node *rb_new)
{
struct drbd_interval *old = rb_entry(rb_old, struct drbd_interval, rb);
struct drbd_interval *new = rb_entry(rb_new, struct drbd_interval, rb);
new->end = old->end;
old->end = compute_subtree_last(old);
}
static const struct rb_augment_callbacks augment_callbacks = {
augment_propagate,
augment_copy,
augment_rotate,
};
RB_DECLARE_CALLBACKS(static, augment_callbacks, struct drbd_interval, rb,
sector_t, end, compute_subtree_last);
/**
* drbd_insert_interval - insert a new interval into a tree