From 88d19cf37952a7e1e38b2bf87a00f0e857e63180 Mon Sep 17 00:00:00 2001 From: John Stultz Date: Mon, 3 Jan 2011 18:59:43 -0800 Subject: [PATCH] timers: Add rb_init_node() to allow for stack allocated rb nodes In cases where a timerqueue_node or some structure that utilizes a timerqueue_node is allocated on the stack, gcc would give warnings caused by the timerqueue_init()'s calling RB_CLEAR_NODE, which self-references the nodes uninitialized data. The solution is to create an rb_init_node() function that zeros the rb_node structure out and then calls RB_CLEAR_NODE(), and then call the new init function from timerqueue_init(). CC: Thomas Gleixner Acked-by: Arnd Bergmann Signed-off-by: John Stultz --- include/linux/rbtree.h | 8 ++++++++ include/linux/timerqueue.h | 2 +- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h index 7066acb..033b507 100644 --- a/include/linux/rbtree.h +++ b/include/linux/rbtree.h @@ -136,6 +136,14 @@ static inline void rb_set_color(struct rb_node *rb, int color) #define RB_EMPTY_NODE(node) (rb_parent(node) == node) #define RB_CLEAR_NODE(node) (rb_set_parent(node, node)) +static inline void rb_init_node(struct rb_node *rb) +{ + rb->rb_parent_color = 0; + rb->rb_right = NULL; + rb->rb_left = NULL; + RB_CLEAR_NODE(rb); +} + extern void rb_insert_color(struct rb_node *, struct rb_root *); extern void rb_erase(struct rb_node *, struct rb_root *); diff --git a/include/linux/timerqueue.h b/include/linux/timerqueue.h index a520fd7..5088727 100644 --- a/include/linux/timerqueue.h +++ b/include/linux/timerqueue.h @@ -39,7 +39,7 @@ struct timerqueue_node *timerqueue_getnext(struct timerqueue_head *head) static inline void timerqueue_init(struct timerqueue_node *node) { - RB_CLEAR_NODE(&node->node); + rb_init_node(&node->node); } static inline void timerqueue_init_head(struct timerqueue_head *head) -- 2.7.4