Release 4.16 mm/interval_tree.c
/*
* mm/interval_tree.c - interval tree for mapping->i_mmap
*
* Copyright (C) 2012, Michel Lespinasse <walken@google.com>
*
* This file is released under the GPL v2.
*/
#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;
}
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Michel Lespinasse | 18 | 100.00% | 2 | 100.00% |
Total | 18 | 100.00% | 2 | 100.00% |
static inline unsigned long vma_last_pgoff(struct vm_area_struct *v)
{
return v->vm_pgoff + vma_pages(v) - 1;
}
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Michel Lespinasse | 22 | 88.00% | 2 | 66.67% |
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INTERVAL_TREE_DEFINE(struct vm_area_struct, shared.rb,
unsigned long, shared.rb_subtree_last,
vma_start_pgoff, vma_last_pgoff,, 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);
}
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Michel Lespinasse | 223 | 96.96% | 2 | 50.00% |
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Total | 230 | 100.00% | 4 | 100.00% |
static inline unsigned long avc_start_pgoff(struct anon_vma_chain *avc)
{
return vma_start_pgoff(avc->vma);
}
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Michel Lespinasse | 21 | 100.00% | 1 | 100.00% |
Total | 21 | 100.00% | 1 | 100.00% |
static inline unsigned long avc_last_pgoff(struct anon_vma_chain *avc)
{
return vma_last_pgoff(avc->vma);
}
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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);
}
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void anon_vma_interval_tree_remove(struct anon_vma_chain *node,
struct rb_root_cached *root)
{
__anon_vma_interval_tree_remove(node, root);
}
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Michel Lespinasse | 21 | 95.45% | 1 | 50.00% |
Davidlohr Bueso A | 1 | 4.55% | 1 | 50.00% |
Total | 22 | 100.00% | 2 | 100.00% |
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);
}
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Michel Lespinasse | 29 | 96.67% | 1 | 50.00% |
Davidlohr Bueso A | 1 | 3.33% | 1 | 50.00% |
Total | 30 | 100.00% | 2 | 100.00% |
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);
}
Contributors
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Michel Lespinasse | 30 | 100.00% | 1 | 100.00% |
Total | 30 | 100.00% | 1 | 100.00% |
#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));
}
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Michel Lespinasse | 34 | 100.00% | 1 | 100.00% |
Total | 34 | 100.00% | 1 | 100.00% |
#endif
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Sasha Levin | 3 | 0.57% | 1 | 12.50% |
Vasyl Gomonovych | 3 | 0.57% | 1 | 12.50% |
Kirill A. Shutemov | 2 | 0.38% | 1 | 12.50% |
Total | 530 | 100.00% | 8 | 100.00% |
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