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Merge git://git.infradead.org/~dwmw2/rbtree-2.6

Browse source 
* git://git.infradead.org/~dwmw2/rbtree-2.6:
  [RBTREE] Switch rb_colour() et al to en_US spelling of 'color' for consistency
  Update UML kernel/physmem.c to use rb_parent() accessor macro
  [RBTREE] Update hrtimers to use rb_parent() accessor macro.
  [RBTREE] Add explicit alignment to sizeof(long) for struct rb_node.
  [RBTREE] Merge colour and parent fields of struct rb_node.
  [RBTREE] Remove dead code in rb_erase()
  [RBTREE] Update JFFS2 to use rb_parent() accessor macro.
  [RBTREE] Update eventpoll.c to use rb_parent() accessor macro.
  [RBTREE] Update key.c to use rb_parent() accessor macro.
  [RBTREE] Update ext3 to use rb_parent() accessor macro.
  [RBTREE] Change rbtree off-tree marking in I/O schedulers.
  [RBTREE] Add accessor macros for colour and parent fields of rb_node
This commit is contained in:
Linus Torvalds 2006-06-20 14:51:22 -07:00
commit 2edc322d42
13 changed files with 140 additions and 136 deletions
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2
arch/um/kernel/physmem.c
View file

@ -69,7 +69,7 @@ static void insert_phys_mapping(struct phys_desc *desc)
panic("Physical remapping for %p already present",
desc->virt);
rb_link_node(&desc->rb, (*n)->rb_parent, n);
rb_link_node(&desc->rb, rb_parent(*n), n);
rb_insert_color(&desc->rb, &phys_mappings);
}

5
block/as-iosched.c
View file

@ -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

8
block/cfq-iosched.c
View file

@ -60,14 +60,9 @@ static DEFINE_SPINLOCK(cfq_exit_lock);
/*
* rb-tree defines
*/
#define RB_NONE (2)
#define RB_EMPTY(node) ((node)->rb_node == NULL)
#define RB_CLEAR_COLOR(node) (node)->rb_color = RB_NONE
#define RB_CLEAR(node) do { \
(node)->rb_parent = NULL; \
RB_CLEAR_COLOR((node)); \
(node)->rb_right = NULL; \
(node)->rb_left = NULL; \
memset(node, 0, sizeof(*node)); \
} while (0)
#define RB_CLEAR_ROOT(root) ((root)->rb_node = NULL)
#define rb_entry_crq(node) rb_entry((node), struct cfq_rq, rb_node)
@ -567,7 +562,6 @@ static inline void cfq_del_crq_rb(struct cfq_rq *crq)
cfq_update_next_crq(crq);
rb_erase(&crq->rb_node, &cfqq->sort_list);
RB_CLEAR_COLOR(&crq->rb_node);
if (cfq_cfqq_on_rr(cfqq) && RB_EMPTY(&cfqq->sort_list))
cfq_del_cfqq_rr(cfqd, cfqq);

5
block/deadline-iosched.c
View file

@ -165,10 +165,9 @@ deadline_find_drq_hash(struct deadline_data *dd, 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_drq(node) rb_entry((node), struct deadline_rq, rb_node)
#define DRQ_RB_ROOT(dd, drq) (&(dd)->sort_list[rq_data_dir((drq)->request)])
#define rq_rb_key(rq) (rq)->sector

6
fs/eventpoll.c
View file

@ -337,20 +337,20 @@ static inline int ep_cmp_ffd(struct epoll_filefd *p1,
/* Special initialization for the rb-tree node to detect linkage */
static inline void ep_rb_initnode(struct rb_node *n)
{
n->rb_parent = n;
rb_set_parent(n, n);
}
/* Removes a node from the rb-tree and marks it for a fast is-linked check */
static inline void ep_rb_erase(struct rb_node *n, struct rb_root *r)
{
rb_erase(n, r);
n->rb_parent = n;
rb_set_parent(n, n);
}
/* Fast check to verify that the item is linked to the main rb-tree */
static inline int ep_rb_linked(struct rb_node *n)
{
return n->rb_parent != n;
return rb_parent(n) != n;
}
/*

2
fs/ext3/dir.c
View file

@ -284,7 +284,7 @@ static void free_rb_tree_fname(struct rb_root *root)
* beginning of the loop and try to free the parent
* node.
*/
parent = n->rb_parent;
parent = rb_parent(n);
fname = rb_entry(n, struct fname, rb_hash);
while (fname) {
struct fname * old = fname;

1
fs/jffs2/nodelist.h
View file

@ -315,7 +315,6 @@ static inline struct jffs2_node_frag *frag_last(struct rb_root *root)
return rb_entry(node, struct jffs2_node_frag, rb);
}
#define rb_parent(rb) ((rb)->rb_parent)
#define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb)
#define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb)
#define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb)

18
fs/jffs2/readinode.c
View file

@ -66,7 +66,7 @@ static void jffs2_free_tmp_dnode_info_list(struct rb_root *list)
jffs2_free_full_dnode(tn->fn);
jffs2_free_tmp_dnode_info(tn);
this = this->rb_parent;
this = rb_parent(this);
if (!this)
break;
@ -708,12 +708,12 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
jffs2_mark_node_obsolete(c, fn->raw);
BUG_ON(rb->rb_left);
if (rb->rb_parent && rb->rb_parent->rb_left == rb) {
if (rb_parent(rb) && rb_parent(rb)->rb_left == rb) {
/* We were then left-hand child of our parent. We need
* to move our own right-hand child into our place. */
repl_rb = rb->rb_right;
if (repl_rb)
repl_rb->rb_parent = rb->rb_parent;
rb_set_parent(repl_rb, rb_parent(rb));
} else
repl_rb = NULL;
@ -721,14 +721,14 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
/* Remove the spent tn from the tree; don't bother rebalancing
* but put our right-hand child in our own place. */
if (tn->rb.rb_parent) {
if (tn->rb.rb_parent->rb_left == &tn->rb)
tn->rb.rb_parent->rb_left = repl_rb;
else if (tn->rb.rb_parent->rb_right == &tn->rb)
tn->rb.rb_parent->rb_right = repl_rb;
if (rb_parent(&tn->rb)) {
if (rb_parent(&tn->rb)->rb_left == &tn->rb)
rb_parent(&tn->rb)->rb_left = repl_rb;
else if (rb_parent(&tn->rb)->rb_right == &tn->rb)
rb_parent(&tn->rb)->rb_right = repl_rb;
else BUG();
} else if (tn->rb.rb_right)
tn->rb.rb_right->rb_parent = NULL;
rb_set_parent(tn->rb.rb_right, NULL);
jffs2_free_tmp_dnode_info(tn);
if (ret) {

2
include/linux/hrtimer.h
View file

@ -127,7 +127,7 @@ extern ktime_t hrtimer_get_next_event(void);
static inline int hrtimer_active(const struct hrtimer *timer)
{
return timer->node.rb_parent != HRTIMER_INACTIVE;
return rb_parent(&timer->node) != &timer->node;
}
/* Forward a hrtimer so it expires after now: */

26
include/linux/rbtree.h
View file

@ -99,19 +99,36 @@ static inline struct page * rb_insert_page_cache(struct inode * inode,
struct rb_node
{
struct rb_node *rb_parent;
int rb_color;
unsigned long rb_parent_color;
#define RB_RED 0
#define RB_BLACK 1
struct rb_node *rb_right;
struct rb_node *rb_left;
};
} __attribute__((aligned(sizeof(long))));
/* The alignment might seem pointless, but allegedly CRIS needs it */
struct rb_root
{
struct rb_node *rb_node;
};
#define rb_parent(r) ((struct rb_node *)((r)->rb_parent_color & ~3))
#define rb_color(r) ((r)->rb_parent_color & 1)
#define rb_is_red(r) (!rb_color(r))
#define rb_is_black(r) rb_color(r)
#define rb_set_red(r) do { (r)->rb_parent_color &= ~1; } while (0)
#define rb_set_black(r) do { (r)->rb_parent_color |= 1; } while (0)
static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
{
rb->rb_parent_color = (rb->rb_parent_color & 3) | (unsigned long)p;
}
static inline void rb_set_color(struct rb_node *rb, int color)
{
rb->rb_parent_color = (rb->rb_parent_color & ~1) | color;
}
#define RB_ROOT (struct rb_root) { NULL, }
#define rb_entry(ptr, type, member) container_of(ptr, type, member)
@ -131,8 +148,7 @@ extern void rb_replace_node(struct rb_node *victim, struct rb_node *new,
static inline void rb_link_node(struct rb_node * node, struct rb_node * parent,
struct rb_node ** rb_link)
{
node->rb_parent = parent;
node->rb_color = RB_RED;
node->rb_parent_color = (unsigned long )parent;
node->rb_left = node->rb_right = NULL;
*rb_link = node;

4
kernel/hrtimer.c
View file

@ -393,7 +393,7 @@ static void __remove_hrtimer(struct hrtimer *timer, struct hrtimer_base *base)
if (base->first == &timer->node)
base->first = rb_next(&timer->node);
rb_erase(&timer->node, &base->active);
timer->node.rb_parent = HRTIMER_INACTIVE;
rb_set_parent(&timer->node, &timer->node);
}
/*
@ -582,7 +582,7 @@ void hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
clock_id = CLOCK_MONOTONIC;
timer->base = &bases[clock_id];
timer->node.rb_parent = HRTIMER_INACTIVE;
rb_set_parent(&timer->node, &timer->node);
}
EXPORT_SYMBOL_GPL(hrtimer_init);

189
lib/rbtree.c
View file

@ -26,60 +26,66 @@
static void __rb_rotate_left(struct rb_node *node, struct rb_root *root)
{
struct rb_node *right = node->rb_right;
struct rb_node *parent = rb_parent(node);
if ((node->rb_right = right->rb_left))
right->rb_left->rb_parent = node;
rb_set_parent(right->rb_left, node);
right->rb_left = node;
if ((right->rb_parent = node->rb_parent))
rb_set_parent(right, parent);
if (parent)
{
if (node == node->rb_parent->rb_left)
node->rb_parent->rb_left = right;
if (node == parent->rb_left)
parent->rb_left = right;
else
node->rb_parent->rb_right = right;
parent->rb_right = right;
}
else
root->rb_node = right;
node->rb_parent = right;
rb_set_parent(node, right);
}
static void __rb_rotate_right(struct rb_node *node, struct rb_root *root)
{
struct rb_node *left = node->rb_left;
struct rb_node *parent = rb_parent(node);
if ((node->rb_left = left->rb_right))
left->rb_right->rb_parent = node;
rb_set_parent(left->rb_right, node);
left->rb_right = node;
if ((left->rb_parent = node->rb_parent))
rb_set_parent(left, parent);
if (parent)
{
if (node == node->rb_parent->rb_right)
node->rb_parent->rb_right = left;
if (node == parent->rb_right)
parent->rb_right = left;
else
node->rb_parent->rb_left = left;
parent->rb_left = left;
}
else
root->rb_node = left;
node->rb_parent = left;
rb_set_parent(node, left);
}
void rb_insert_color(struct rb_node *node, struct rb_root *root)
{
struct rb_node *parent, *gparent;
while ((parent = node->rb_parent) && parent->rb_color == RB_RED)
while ((parent = rb_parent(node)) && rb_is_red(parent))
{
gparent = parent->rb_parent;
gparent = rb_parent(parent);
if (parent == gparent->rb_left)
{
{
register struct rb_node *uncle = gparent->rb_right;
if (uncle && uncle->rb_color == RB_RED)
if (uncle && rb_is_red(uncle))
{
uncle->rb_color = RB_BLACK;
parent->rb_color = RB_BLACK;
gparent->rb_color = RB_RED;
rb_set_black(uncle);
rb_set_black(parent);
rb_set_red(gparent);
node = gparent;
continue;
}
@ -94,17 +100,17 @@ void rb_insert_color(struct rb_node *node, struct rb_root *root)
node = tmp;
}
parent->rb_color = RB_BLACK;
gparent->rb_color = RB_RED;
rb_set_black(parent);
rb_set_red(gparent);
__rb_rotate_right(gparent, root);
} else {
{
register struct rb_node *uncle = gparent->rb_left;
if (uncle && uncle->rb_color == RB_RED)
if (uncle && rb_is_red(uncle))
{
uncle->rb_color = RB_BLACK;
parent->rb_color = RB_BLACK;
gparent->rb_color = RB_RED;
rb_set_black(uncle);
rb_set_black(parent);
rb_set_red(gparent);
node = gparent;
continue;
}
@ -119,13 +125,13 @@ void rb_insert_color(struct rb_node *node, struct rb_root *root)
node = tmp;
}
parent->rb_color = RB_BLACK;
gparent->rb_color = RB_RED;
rb_set_black(parent);
rb_set_red(gparent);
__rb_rotate_left(gparent, root);
}
}
root->rb_node->rb_color = RB_BLACK;
rb_set_black(root->rb_node);
}
EXPORT_SYMBOL(rb_insert_color);
@ -134,43 +140,40 @@ static void __rb_erase_color(struct rb_node *node, struct rb_node *parent,
{
struct rb_node *other;
while ((!node || node->rb_color == RB_BLACK) && node != root->rb_node)
while ((!node || rb_is_black(node)) && node != root->rb_node)
{
if (parent->rb_left == node)
{
other = parent->rb_right;
if (other->rb_color == RB_RED)
if (rb_is_red(other))
{
other->rb_color = RB_BLACK;
parent->rb_color = RB_RED;
rb_set_black(other);
rb_set_red(parent);
__rb_rotate_left(parent, root);
other = parent->rb_right;
}
if ((!other->rb_left ||
other->rb_left->rb_color == RB_BLACK)
&& (!other->rb_right ||
other->rb_right->rb_color == RB_BLACK))
if ((!other->rb_left || rb_is_black(other->rb_left)) &&
(!other->rb_right || rb_is_black(other->rb_right)))
{
other->rb_color = RB_RED;
rb_set_red(other);
node = parent;
parent = node->rb_parent;
parent = rb_parent(node);
}
else
{
if (!other->rb_right ||
other->rb_right->rb_color == RB_BLACK)
if (!other->rb_right || rb_is_black(other->rb_right))
{
register struct rb_node *o_left;
struct rb_node *o_left;
if ((o_left = other->rb_left))
o_left->rb_color = RB_BLACK;
other->rb_color = RB_RED;
rb_set_black(o_left);
rb_set_red(other);
__rb_rotate_right(other, root);
other = parent->rb_right;
}
other->rb_color = parent->rb_color;
parent->rb_color = RB_BLACK;
rb_set_color(other, rb_color(parent));
rb_set_black(parent);
if (other->rb_right)
other->rb_right->rb_color = RB_BLACK;
rb_set_black(other->rb_right);
__rb_rotate_left(parent, root);
node = root->rb_node;
break;
@ -179,38 +182,35 @@ static void __rb_erase_color(struct rb_node *node, struct rb_node *parent,
else
{
other = parent->rb_left;
if (other->rb_color == RB_RED)
if (rb_is_red(other))
{
other->rb_color = RB_BLACK;
parent->rb_color = RB_RED;
rb_set_black(other);
rb_set_red(parent);
__rb_rotate_right(parent, root);
other = parent->rb_left;
}
if ((!other->rb_left ||
other->rb_left->rb_color == RB_BLACK)
&& (!other->rb_right ||
other->rb_right->rb_color == RB_BLACK))
if ((!other->rb_left || rb_is_black(other->rb_left)) &&
(!other->rb_right || rb_is_black(other->rb_right)))
{
other->rb_color = RB_RED;
rb_set_red(other);
node = parent;
parent = node->rb_parent;
parent = rb_parent(node);
}
else
{
if (!other->rb_left ||
other->rb_left->rb_color == RB_BLACK)
if (!other->rb_left || rb_is_black(other->rb_left))
{
register struct rb_node *o_right;
if ((o_right = other->rb_right))
o_right->rb_color = RB_BLACK;
other->rb_color = RB_RED;
rb_set_black(o_right);
rb_set_red(other);
__rb_rotate_left(other, root);
other = parent->rb_left;
}
other->rb_color = parent->rb_color;
parent->rb_color = RB_BLACK;
rb_set_color(other, rb_color(parent));
rb_set_black(parent);
if (other->rb_left)
other->rb_left->rb_color = RB_BLACK;
rb_set_black(other->rb_left);
__rb_rotate_right(parent, root);
node = root->rb_node;
break;
@ -218,7 +218,7 @@ static void __rb_erase_color(struct rb_node *node, struct rb_node *parent,
}
}
if (node)
node->rb_color = RB_BLACK;
rb_set_black(node);
}
void rb_erase(struct rb_node *node, struct rb_root *root)
@ -238,48 +238,41 @@ void rb_erase(struct rb_node *node, struct rb_root *root)
while ((left = node->rb_left) != NULL)
node = left;
child = node->rb_right;
parent = node->rb_parent;
color = node->rb_color;
parent = rb_parent(node);
color = rb_color(node);
if (child)
child->rb_parent = parent;
if (parent)
{
if (parent->rb_left == node)
parent->rb_left = child;
else
parent->rb_right = child;
}
else
root->rb_node = child;
if (node->rb_parent == old)
rb_set_parent(child, parent);
if (parent == old) {
parent->rb_right = child;
parent = node;
node->rb_parent = old->rb_parent;
node->rb_color = old->rb_color;
} else
parent->rb_left = child;
node->rb_parent_color = old->rb_parent_color;
node->rb_right = old->rb_right;
node->rb_left = old->rb_left;
if (old->rb_parent)
if (rb_parent(old))
{
if (old->rb_parent->rb_left == old)
old->rb_parent->rb_left = node;
if (rb_parent(old)->rb_left == old)
rb_parent(old)->rb_left = node;
else
old->rb_parent->rb_right = node;
rb_parent(old)->rb_right = node;
} else
root->rb_node = node;
old->rb_left->rb_parent = node;
rb_set_parent(old->rb_left, node);
if (old->rb_right)
old->rb_right->rb_parent = node;
rb_set_parent(old->rb_right, node);
goto color;
}
parent = node->rb_parent;
color = node->rb_color;
parent = rb_parent(node);
color = rb_color(node);
if (child)
child->rb_parent = parent;
rb_set_parent(child, parent);
if (parent)
{
if (parent->rb_left == node)
@ -327,6 +320,8 @@ EXPORT_SYMBOL(rb_last);
struct rb_node *rb_next(struct rb_node *node)
{
struct rb_node *parent;
/* If we have a right-hand child, go down and then left as far
as we can. */
if (node->rb_right) {
@ -342,15 +337,17 @@ struct rb_node *rb_next(struct rb_node *node)
ancestor is a right-hand child of its parent, keep going
up. First time it's a left-hand child of its parent, said
parent is our 'next' node. */
while (node->rb_parent && node == node->rb_parent->rb_right)
node = node->rb_parent;
while ((parent = rb_parent(node)) && node == parent->rb_right)
node = parent;
return node->rb_parent;
return parent;
}
EXPORT_SYMBOL(rb_next);
struct rb_node *rb_prev(struct rb_node *node)
{
struct rb_node *parent;
/* If we have a left-hand child, go down and then right as far
as we can. */
if (node->rb_left) {
@ -362,17 +359,17 @@ struct rb_node *rb_prev(struct rb_node *node)
/* No left-hand children. Go up till we find an ancestor which
is a right-hand child of its parent */
while (node->rb_parent && node == node->rb_parent->rb_left)
node = node->rb_parent;
while ((parent = rb_parent(node)) && node == parent->rb_left)
node = parent;
return node->rb_parent;
return parent;
}
EXPORT_SYMBOL(rb_prev);
void rb_replace_node(struct rb_node *victim, struct rb_node *new,
struct rb_root *root)
{
struct rb_node *parent = victim->rb_parent;
struct rb_node *parent = rb_parent(victim);
/* Set the surrounding nodes to point to the replacement */
if (parent) {
@ -384,9 +381,9 @@ void rb_replace_node(struct rb_node *victim, struct rb_node *new,
root->rb_node = new;
}
if (victim->rb_left)
victim->rb_left->rb_parent = new;
rb_set_parent(victim->rb_left, new);
if (victim->rb_right)
victim->rb_right->rb_parent = new;
rb_set_parent(victim->rb_right, new);
/* Copy the pointers/colour from the victim to the replacement */
*new = *victim;

8
security/keys/key.c
View file

@ -211,12 +211,12 @@ static inline void key_alloc_serial(struct key *key)
key->serial = 2;
key_serial_next = key->serial + 1;
if (!parent->rb_parent)
if (!rb_parent(parent))
p = &key_serial_tree.rb_node;
else if (parent->rb_parent->rb_left == parent)
p = &parent->rb_parent->rb_left;
else if (rb_parent(parent)->rb_left == parent)
p = &(rb_parent(parent)->rb_left);
else
p = &parent->rb_parent->rb_right;
p = &(rb_parent(parent)->rb_right);
parent = rb_next(parent);
if (!parent)