Messages in this thread Patch in this message | | | From | Jens Axboe <> | Subject | [PATCH] 2/15 rbtree: fixed reversed RB_EMPTY_NODE and rb_next/prev | Date | Thu, 13 Jul 2006 14:46:25 +0200 |
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The conditions got reserved. Also make rb_next() and rb_prev() check for the empty condition.
Signed-off-by: Jens Axboe <axboe@suse.de> --- block/as-iosched.c | 4 ++-- include/linux/rbtree.h | 2 +- lib/rbtree.c | 6 ++++++ 3 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/block/as-iosched.c b/block/as-iosched.c index 1c44ce3..d677029 100644 --- a/block/as-iosched.c +++ b/block/as-iosched.c @@ -336,7 +336,7 @@ static void as_add_arq_rb(struct as_data static inline void as_del_arq_rb(struct as_data *ad, struct as_rq *arq) { - if (!RB_EMPTY_NODE(&arq->rb_node)) { + if (RB_EMPTY_NODE(&arq->rb_node)) { WARN_ON(1); return; } @@ -1039,7 +1039,7 @@ static void as_move_to_dispatch(struct a struct request *rq = arq->request; const int data_dir = arq->is_sync; - BUG_ON(!RB_EMPTY_NODE(&arq->rb_node)); + BUG_ON(RB_EMPTY_NODE(&arq->rb_node)); as_antic_stop(ad); ad->antic_status = ANTIC_OFF; diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h index 8d5382e..344bc34 100644 --- a/include/linux/rbtree.h +++ b/include/linux/rbtree.h @@ -133,7 +133,7 @@ #define RB_ROOT (struct rb_root) { NULL, #define rb_entry(ptr, type, member) container_of(ptr, type, member) #define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL) -#define RB_EMPTY_NODE(node) (rb_parent(node) != node) +#define RB_EMPTY_NODE(node) (rb_parent(node) == node) #define RB_CLEAR_NODE(node) (rb_set_parent(node, node)) extern void rb_insert_color(struct rb_node *, struct rb_root *); diff --git a/lib/rbtree.c b/lib/rbtree.c index 1e55ba1..48499c2 100644 --- a/lib/rbtree.c +++ b/lib/rbtree.c @@ -322,6 +322,9 @@ struct rb_node *rb_next(struct rb_node * { struct rb_node *parent; + if (rb_parent(node) == node) + return NULL; + /* If we have a right-hand child, go down and then left as far as we can. */ if (node->rb_right) { @@ -348,6 +351,9 @@ struct rb_node *rb_prev(struct rb_node * { struct rb_node *parent; + if (rb_parent(node) == node) + return NULL; + /* If we have a left-hand child, go down and then right as far as we can. */ if (node->rb_left) { -- 1.4.1.ged0e0 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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