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authorDavid Woodhouse <dwmw2@infradead.org>2006-04-21 13:15:17 +0100
committerDavid Woodhouse <dwmw2@infradead.org>2006-04-21 13:15:17 +0100
commit3db3a445308b3cee9bbbd8baa6d05081c9532da0 (patch)
tree768e3a190df58b0f5f5d4a5c5ade925649e757dd /block/as-iosched.c
parent7fe1e133bf45b0fe70491ed3d4c5b491feff7aa8 (diff)
downloadop-kernel-dev-3db3a445308b3cee9bbbd8baa6d05081c9532da0.zip
op-kernel-dev-3db3a445308b3cee9bbbd8baa6d05081c9532da0.tar.gz
[RBTREE] Change rbtree off-tree marking in I/O schedulers.
They were abusing the rb_color field to mark nodes which weren't currently on the tree. Fix that to use the same method as eventpoll did -- setting the parent pointer to point back to itself. And use the appropriate accessor macros for setting and reading the parent. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'block/as-iosched.c')
-rw-r--r--block/as-iosched.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/block/as-iosched.c b/block/as-iosched.c
index e25a5d7..ed336ab 100644
--- a/block/as-iosched.c
+++ b/block/as-iosched.c
@@ -353,10 +353,9 @@ static struct request *as_find_arq_hash(struct as_data *ad, sector_t offset)
/*
* rb tree support functions
*/
-#define RB_NONE (2)
#define RB_EMPTY(root) ((root)->rb_node == NULL)
-#define ON_RB(node) ((node)->rb_color != RB_NONE)
-#define RB_CLEAR(node) ((node)->rb_color = RB_NONE)
+#define ON_RB(node) (rb_parent(node) != node)
+#define RB_CLEAR(node) (rb_set_parent(node, node))
#define rb_entry_arq(node) rb_entry((node), struct as_rq, rb_node)
#define ARQ_RB_ROOT(ad, arq) (&(ad)->sort_list[(arq)->is_sync])
#define rq_rb_key(rq) (rq)->sector
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