Revision 602b5366292b5c04926c6042a400d1907413b010 authored by Linus Torvalds on 12 September 2014, 18:54:54 UTC, committed by Linus Torvalds on 12 September 2014, 18:54:54 UTC
Pull NFS client fixes from Trond Myklebust: "Highlights: - fix a kernel warning when removing /proc/net/nfsfs - revert commit 49a4bda22e18 due to Oopses - fix a typo in the pNFS file layout commit code" * tag 'nfs-for-3.17-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: pnfs: fix filelayout_retry_commit when idx > 0 nfs: revert "nfs4: queue free_lock_state job submission to nfsiod" nfs: fix kernel warning when removing proc entry
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;
}
static inline unsigned long vma_last_pgoff(struct vm_area_struct *v)
{
return v->vm_pgoff + ((v->vm_end - v->vm_start) >> PAGE_SHIFT) - 1;
}
INTERVAL_TREE_DEFINE(struct vm_area_struct, shared.linear.rb,
unsigned long, shared.linear.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 *root)
{
struct rb_node **link;
struct vm_area_struct *parent;
unsigned long last = vma_last_pgoff(node);
VM_BUG_ON(vma_start_pgoff(node) != vma_start_pgoff(prev));
if (!prev->shared.linear.rb.rb_right) {
parent = prev;
link = &prev->shared.linear.rb.rb_right;
} else {
parent = rb_entry(prev->shared.linear.rb.rb_right,
struct vm_area_struct, shared.linear.rb);
if (parent->shared.linear.rb_subtree_last < last)
parent->shared.linear.rb_subtree_last = last;
while (parent->shared.linear.rb.rb_left) {
parent = rb_entry(parent->shared.linear.rb.rb_left,
struct vm_area_struct, shared.linear.rb);
if (parent->shared.linear.rb_subtree_last < last)
parent->shared.linear.rb_subtree_last = last;
}
link = &parent->shared.linear.rb.rb_left;
}
node->shared.linear.rb_subtree_last = last;
rb_link_node(&node->shared.linear.rb, &parent->shared.linear.rb, link);
rb_insert_augmented(&node->shared.linear.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 *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 *root)
{
__anon_vma_interval_tree_remove(node, root);
}
struct anon_vma_chain *
anon_vma_interval_tree_iter_first(struct rb_root *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
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