Contributors: 11
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Michel Lespinasse |
491 |
92.29% |
5 |
23.81% |
| Andrew Morton |
9 |
1.69% |
4 |
19.05% |
| Davidlohr Bueso A |
7 |
1.32% |
1 |
4.76% |
| Linus Torvalds (pre-git) |
7 |
1.32% |
4 |
19.05% |
| Linus Torvalds |
6 |
1.13% |
1 |
4.76% |
| Vasyl Gomonovych |
3 |
0.56% |
1 |
4.76% |
| Sasha Levin |
3 |
0.56% |
1 |
4.76% |
| Thomas Gleixner |
2 |
0.38% |
1 |
4.76% |
| Kirill A. Shutemov |
2 |
0.38% |
1 |
4.76% |
| Peter Zijlstra |
1 |
0.19% |
1 |
4.76% |
| Zhiyuan Dai |
1 |
0.19% |
1 |
4.76% |
| Total |
532 |
|
21 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* mm/interval_tree.c - interval tree for mapping->i_mmap
*
* Copyright (C) 2012, Michel Lespinasse <walken@google.com>
*/
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/rmap.h>
#include <linux/interval_tree_generic.h>
static inline unsigned long vma_start_pgoff(struct vm_area_struct *v)
{
return v->vm_pgoff;
}
static inline unsigned long vma_last_pgoff(struct vm_area_struct *v)
{
return v->vm_pgoff + vma_pages(v) - 1;
}
INTERVAL_TREE_DEFINE(struct vm_area_struct, shared.rb,
unsigned long, shared.rb_subtree_last,
vma_start_pgoff, vma_last_pgoff, /* empty */, vma_interval_tree)
/* Insert node immediately after prev in the interval tree */
void vma_interval_tree_insert_after(struct vm_area_struct *node,
struct vm_area_struct *prev,
struct rb_root_cached *root)
{
struct rb_node **link;
struct vm_area_struct *parent;
unsigned long last = vma_last_pgoff(node);
VM_BUG_ON_VMA(vma_start_pgoff(node) != vma_start_pgoff(prev), node);
if (!prev->shared.rb.rb_right) {
parent = prev;
link = &prev->shared.rb.rb_right;
} else {
parent = rb_entry(prev->shared.rb.rb_right,
struct vm_area_struct, shared.rb);
if (parent->shared.rb_subtree_last < last)
parent->shared.rb_subtree_last = last;
while (parent->shared.rb.rb_left) {
parent = rb_entry(parent->shared.rb.rb_left,
struct vm_area_struct, shared.rb);
if (parent->shared.rb_subtree_last < last)
parent->shared.rb_subtree_last = last;
}
link = &parent->shared.rb.rb_left;
}
node->shared.rb_subtree_last = last;
rb_link_node(&node->shared.rb, &parent->shared.rb, link);
rb_insert_augmented(&node->shared.rb, &root->rb_root,
&vma_interval_tree_augment);
}
static inline unsigned long avc_start_pgoff(struct anon_vma_chain *avc)
{
return vma_start_pgoff(avc->vma);
}
static inline unsigned long avc_last_pgoff(struct anon_vma_chain *avc)
{
return vma_last_pgoff(avc->vma);
}
INTERVAL_TREE_DEFINE(struct anon_vma_chain, rb, unsigned long, rb_subtree_last,
avc_start_pgoff, avc_last_pgoff,
static inline, __anon_vma_interval_tree)
void anon_vma_interval_tree_insert(struct anon_vma_chain *node,
struct rb_root_cached *root)
{
#ifdef CONFIG_DEBUG_VM_RB
node->cached_vma_start = avc_start_pgoff(node);
node->cached_vma_last = avc_last_pgoff(node);
#endif
__anon_vma_interval_tree_insert(node, root);
}
void anon_vma_interval_tree_remove(struct anon_vma_chain *node,
struct rb_root_cached *root)
{
__anon_vma_interval_tree_remove(node, root);
}
struct anon_vma_chain *
anon_vma_interval_tree_iter_first(struct rb_root_cached *root,
unsigned long first, unsigned long last)
{
return __anon_vma_interval_tree_iter_first(root, first, last);
}
struct anon_vma_chain *
anon_vma_interval_tree_iter_next(struct anon_vma_chain *node,
unsigned long first, unsigned long last)
{
return __anon_vma_interval_tree_iter_next(node, first, last);
}
#ifdef CONFIG_DEBUG_VM_RB
void anon_vma_interval_tree_verify(struct anon_vma_chain *node)
{
WARN_ON_ONCE(node->cached_vma_start != avc_start_pgoff(node));
WARN_ON_ONCE(node->cached_vma_last != avc_last_pgoff(node));
}
#endif