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dm bufio: clean up rbtree block ordering

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dm-bufio uses unnatural ordering in the rb-tree - blocks with smaller
numbers were put to the right node and blocks with bigger numbers were
put to the left node.

Reverse that logic so that it's natural.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mikulas Patocka 2020-06-02 15:34:39 +02:00 committed by Mike Snitzer
parent 40e9c5ac4e
commit 88f878e588
1 changed files with 3 additions and 3 deletions
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6
drivers/md/dm-bufio.c
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@ -256,7 +256,7 @@ static struct dm_buffer *__find(struct dm_bufio_client *c, sector_t block)
if (b->block == block)
return b;
n = (b->block < block) ? n->rb_left : n->rb_right;
n = block < b->block ? n->rb_left : n->rb_right;
}
return NULL;
@ -276,8 +276,8 @@ static void __insert(struct dm_bufio_client *c, struct dm_buffer *b)
}
parent = *new;
new = (found->block < b->block) ?
&((*new)->rb_left) : &((*new)->rb_right);
new = b->block < found->block ?
&found->node.rb_left : &found->node.rb_right;
}
rb_link_node(&b->node, parent, new);