xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'x86-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse Source 
* 'x86-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, pat: Update the page flags for memtype atomically instead of using memtype_lock
  x86, pat: In rbt_memtype_check_insert(), update new->type only if valid
  x86, pat: Migrate to rbtree only backend for pat memtype management
  x86, pat: Preparatory changes in pat.c for bigger rbtree change
  rbtree: Add support for augmented rbtrees
This commit is contained in:
Linus Torvalds
2010-05-18 09:28:04 -07:00
parent 96fbeb973a 1f9cc3cb6a
commit c4fd308ed6
8 changed files with 470 additions and 244 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
lib/rbtree.c
View File

@@ -44,6 +44,11 @@ static void __rb_rotate_left(struct rb_node *node, struct rb_root *root)
else
root->rb_node = right;
rb_set_parent(node, right);
if (root->augment_cb) {
root->augment_cb(node);
root->augment_cb(right);
}
}
static void __rb_rotate_right(struct rb_node *node, struct rb_root *root)
@@ -67,12 +72,20 @@ static void __rb_rotate_right(struct rb_node *node, struct rb_root *root)
else
root->rb_node = left;
rb_set_parent(node, left);
if (root->augment_cb) {
root->augment_cb(node);
root->augment_cb(left);
}
}
void rb_insert_color(struct rb_node *node, struct rb_root *root)
{
struct rb_node *parent, *gparent;
if (root->augment_cb)
root->augment_cb(node);
while ((parent = rb_parent(node)) && rb_is_red(parent))
{
gparent = rb_parent(parent);
@@ -227,12 +240,15 @@ void rb_erase(struct rb_node *node, struct rb_root *root)
else
{
struct rb_node *old = node, *left;
int old_parent_cb = 0;
int successor_parent_cb = 0;
node = node->rb_right;
while ((left = node->rb_left) != NULL)
node = left;
if (rb_parent(old)) {
old_parent_cb = 1;
if (rb_parent(old)->rb_left == old)
rb_parent(old)->rb_left = node;
else
@@ -247,8 +263,10 @@ void rb_erase(struct rb_node *node, struct rb_root *root)
if (parent == old) {
parent = node;
} else {
successor_parent_cb = 1;
if (child)
rb_set_parent(child, parent);
parent->rb_left = child;
node->rb_right = old->rb_right;
@@ -259,6 +277,24 @@ void rb_erase(struct rb_node *node, struct rb_root *root)
node->rb_left = old->rb_left;
rb_set_parent(old->rb_left, node);
if (root->augment_cb) {
/*
* Here, three different nodes can have new children.
* The parent of the successor node that was selected
* to replace the node to be erased.
* The node that is getting erased and is now replaced
* by its successor.
* The parent of the node getting erased-replaced.
*/
if (successor_parent_cb)
root->augment_cb(parent);
root->augment_cb(node);
if (old_parent_cb)
root->augment_cb(rb_parent(old));
}
goto color;
}
@@ -267,15 +303,19 @@ void rb_erase(struct rb_node *node, struct rb_root *root)
if (child)
rb_set_parent(child, parent);
if (parent)
{
if (parent) {
if (parent->rb_left == node)
parent->rb_left = child;
else
parent->rb_right = child;
}
else
if (root->augment_cb)
root->augment_cb(parent);
} else {
root->rb_node = child;
}
color:
if (color == RB_BLACK)