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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107// 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;}
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_RBvoid 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